Insulation Buried Attic Ducts: Analysis and Field Evaluation Findings Dianne Griffiths, Steven Winter Associates, Inc. Attic Ductwork Installation Recently I’ve installed ductwork in the attic space. The heating unit was recently converted from just heat to heat/ac, and there is no way to get the hot air at the ceiling on the 2nd floor back to the unit, so we will run a duct down from the attic to the basement. When your system itself is in the attic, however, you don't have to worry about this, because your ducts won't have to run all across the attic. Get to know your HVAC system. Its best to run a metal trunk line that's externally insulated with at least 2"sfk or better insulation. The best approach is to run supply plumbing together in a few joist spaces. Replacing aging, leaking or inadequate ductwork typically costs about $35-$55 a linear foot for labor and materials, or $1,000-$5,000 or more for a single-family home, depending on the length and type of ducts used (sheet metal, fiberduct or round flexible. long to bring the heated air down from attic heater to the dryer. (Too cool + Too much moisture = Sweating ductwork. These suggestions are meant to add years of trouble free service from our built-in heater products. Help! I'm completely lost on what we can do now, and not sure if this is the right forum, or the remodeling one. This will involve having a professional come and install vents and ductwork, but if you’re planning on using your attic space regularly, this will be well-worth the effort. Personally I don’t like this kind of installation, but a homeowner decided to build a master bedroom, master bathroom, two laundry rooms and two additional rooms above two and three car garages with a bridge. Often you can collect the ceiling air through a network of flexible pipes in an attic. An attic fan simply draws in outside air and allows the stagnant heated air to circulate through the ventilation ducts. So if you don't run your air conditioner much during the spring and fall, humidity will continue to build up in your your attic. Screw the ductwork together Connect the ductwork with sheet metal screws, wrap the connections with aluminum faced duct tape, then wrap the attic part of the duct work with an insulated sleeve. This might cost a bit more if the electrical panel also needs to be upgraded. Removing mold and mildew can be a costly service, so by enhancing your attic’s ventilation, it makes for a much more cost-effective solution. You may notice a theme here: attic ventilation gets blamed for a lot of problems that often are not caused by ventilation, but rather deeper issues. Upstairs, Bob gets a look at how HVAC ductwork is assembled and run through the attic to an air handler. Avoid bending ducts across sharp corners or in any way that puts them in contact with metal fixtures, pipes, or conduits. You may have already been aware that heat pumps are sized by tonnage: the most common sizes are a 2 ton heat pump, a 3 ton heat pump and a 5 ton heat pump. If I ran the duct 30 feet to the gable end of the house and put a exhaust vent with a one-way flapper (I forget the name of that ) so wind doesn't come in, it would be similar in theory to the bathroom exhaust fan that does the same. Bob's been a tin bender for more than 40 years. From that point unprotected ductwork is routed within the attic to a common exhaust fan. in Los Angeles today. Ductwork is the part of your system that moves air from place to place. Shop hvac duct & fittings in the heating & cooling section of Lowes. The line to the attic will have an inline blower installed in it as well, because I'll be using it for an AC I'm installing too. The duct should not be crushed or kinked. But there's an empty closet, and access to the attic. HVAC Layout & Design. No thought was given in the basement to duct location. To get rid of squirrels in the attic, try soaking a rag in ammonia and placing it in your attic, which may force the squirrels to leave because of the strong smell. The trickiest part of installing a range hood is determining how to run the ventilation ducts. Ducts are run vertically at the inside of the home, so the next step is to run the ductwork horizontally between the floor joists to an interior wall. He insists he still doesn't know. The chap says he has lots of condensation coming into the fan and it now stays on continuously even with the light off. Another thing that causes ducts to sweat is when they are run through trusses or supported by the building structure in a crawlspace. Small leaks throughout a system of ducts can result in weak airflow and uncomfortably cool temperatures in rooms furthest from your furnace. Our heaters are secondary heat sources so 30-45 minutes is adequate to warm a bathroom. In addition to comparing ducts in the attic to ducts inside the building envelope, Roberts and Winkler also looked at electricity savings of other measures, such as adding insulation, installing better windows, and using higher efficiency air conditioners. The duct should not be aimed at a roof vent or have any loose connections inside the attic. all the joints. Static pressure in fan systems is typically less than 2” SP, or 0. Airflow in a duct run of any length can be compromised by sharp turns or even. We have over 50000 HVAC parts available to us. This page is dedicated to the attic ductwork installation, runing of the ductwork in chase, furnace and garage tube heater installation. Be extremely careful while working in the attic. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. Other Residential Products (Vents, Siding, Roll Roofing) Proper ductwork installation of a bathroom exhaust fan. How to Add an Air Duct to a Room step by step instructions. Insulating the duct may also help. When your attic insulation is raised to the recommended levels, it will will prevent heat transfer between the attic and the rooms below, allowing your heating and cooling systems to run less frequently and for shorter times. Any tips on the best way to run coax from an Attic antenna to a basement TV? I am dreading having to cut open the walls. The Duct: Unlike the “dryer vent” section the code is pretty quiet on what can be used & how it should be run. If there isn't a shorter route, you will need to add an in line booster fan. Often you can collect the ceiling air through a network of flexible pipes in an attic. The exhaust duct is 20ft. I want to sheetrock around the ducts. At this point in the summer, after two months of solid 100+ degree temperatures, Phoenix homeowners start feeling the burden of exorbitant electric bills due to near-constant use of air conditioning. Greene Solutions provides Aeroseal solutions in Columbus and vicinity. Any new house built today should have its ductwork contained in the “conditioned” space of the house. This duct extends up to the second floor where it often lines up with an interior hallway wall. Cuss the Truss. SpacePak is the original innovator of high-velocity small-duct home heating and cooling systems. I have ductwork running the length of my basement, right in the middle of the room. The problem: If your air ducts primarily run through the attic, keep in mind that many attic spaces are not insulated. - The system doesn't add outside air if sealed properly. Duct bends that do not comply with the one duct diameter bend guideline. Mold in your HVAC system is a big problem. Put the crimped end in first, then put the other end of the duct in. Connecting a swamp cooler to the existing ductwork of a house involves placing the cooler in an area above the rooms to be cooled because a swamp cooler works by adding moisture to the air and having it evaporate to lower ambient air temperature. What are the potential problems, if any, of venting a portable A/C unit into a closet or attic? I've got a portable A/C unit, but no windows in the room I'm trying to vent. Moving your existing HVAC Equipment. The Attic Factor – How Your Attic Can Affect Your Air Conditioning This entry was posted in Blog on September 12, 2019 by ChandlerAir. Use duct sealant (mastic) or metal-backed (foil) tape to seal the seams and connections of ducts. Sometimes, such as in town-homes or condos, it's not possible to vent a dryer through a wall outside. This post by Scott Gibson first appeared on Green Building Advisor. Once those timers are installed, train everyone in the house to run the bathroom fan for 30 - 60 minutes after every shower or bath; this is how long it takes to get indoor humidity levels back to normal. Re: Ducts thru attic floor I have seen a drywalled first-floor-to-3rd-floor column used for air ducting and other miscellaneous communications/network wiring. This episode dealt with a number of “DIY” heating and cooling projects including the installation of a supply register & a return air vent to an unfinished basement. When your attic insulation is raised to the recommended levels, it will will prevent heat transfer between the attic and the rooms below, allowing your heating and cooling systems to run less frequently and for shorter times. Our duct was originally 4″ wide but because of the larger hole in the roof left by our builder, I opted to use a 5″ gasket in order to bridge the gaps at the roof vent and replace the 4″ ductwork with 5″ fittings. Keep as much of the ductwork span as possible inside the conditioned envelope of the home. Other Residential Products (Vents, Siding, Roll Roofing) Proper ductwork installation of a bathroom exhaust fan. Placing a dehumidifier inside the attic will help to draw out moisture from the surrounding environment. Both metal and fiberglass duct board are rigid and installed in pieces, while flex-duct comes in long sections. During the construction of your home, they drill and cut holes through the walls to run these pipes and wires. HVAC Attic Ductwork - 12 1. Plan the framing package to include chases or trusses to accommodate ductwork [2B]. Problem number one -- the openings at the ceiling around ductwork is rarely properly sealed totally air tight. Remember to include the duct run length and any elbows in your calculations. If the vent system back pressure is less than 0. com, I always recommend installing an insulated bathroom vent, which is a just a normal vent surrounded by fiberglass insulation. Wire the attic for electricity. The transition duct should be as short as possible to connect the dryer to the metal dryer vent and it should be no longer than 8 feet. Every place the duct work transitions from heated to unheated space creates a hole in the thermal envelope. Pitch the attic ductwork back toward the dryer so that any condensation will run back toward the heated space. 32 cm) wire hanging (called a lighting pigtail) to connect the light fixtures. Right now it's only venting directly between the joists. The metal duct should be sealed with tape at every joint. Round hvac ducts are definitely the more common type of ductwork – and not without reason. Ducts that are loose at a collar or do not have a metal sleeve at a splice. How to Install Fiberglass Insulation into Your Attic. Cut all the holes in the trunk line where they will exit and run to the floor mounts. Get to know your HVAC system. • An alternative method of duct sealing is available that seals the duct from the inside. You need to use short ducts and pump the air directly from the attic into the space you want to heat. When you encapsulate an attic with spray foam, you are converting it into an airtight Igloo cooler!. Think about it, condensation on ductwork probably isn't a big problem in Phoenix, Arizona, but why? Because the average humidity level is 10-20% in Phoenix. Ducts should be able to run between studs in the wall and then turn into a joist bay (the space between two joists). duct enters the wall. the run was way too long and the fan basically was ineffective from day one. You may have heard that it’s okay to run your bathroom extractor fan into the attic or upper living space of your home. • The chart assumes the blower motor and total effective length of the duct system to be adequate for a. Step only on the joists because the drywall under the insulation will not support your body weight – you can fall through the ceiling – resulting in injury or at least a messy drywall repair. Most building code calls for R-8 insulation to insulate ducts, but you should always check with your building inspector. Duct Insulation. Step 3: Run the Ductwork. Many people often try to determine the required size of heat pump based on some rule of thumb of 1 ton per 500 square feet. Run the new flexible air duct under the house from the floor return to the underside of the air handler and attach to the metal vent box, or plenum (Image 1). Attics have more extreme temperatures. Replacing aging, leaking or inadequate ductwork typically costs about $35-$55 a linear foot for labor and materials, or $1,000-$5,000 or more for a single-family home, depending on the length and type of ducts used (sheet metal, fiberduct or round flexible. 1 of the International Residential Code (IRC). Energy Saver, we are passionate about finding and fixing problems like this one. Insulate Attic Ductwork. Secure the connection with aluminum tape. paint on mastic or mastic tape. These suggestions are meant to add years of trouble free service from our built-in heater products. How Do I Prevent Moisture When Venting a Bathroom Into An Attic? When a bathroom vent is making a long horizontal run in an attic, there is always a risk of condensation or water droplets. This guide gives clear steps to solving problems with condensation on AC ducts so that it does not return. To get the same result past 25 ft. Then there’s the question of pressure. If the ducts run through the attic DON'T HANG THEM They need to lay on the ceiling joist or bottom cord, streached out and. After all, along with fine dirt and dust, ducts become clogged with pet dander, dead skin cells, mold spores, fungi, pollen, rodent and insect feces, and even microorganisms from cat litter. This article describes routing bath exhaust fan duct upwards through an attic or roof space or downwards through a floor or crawl space. The attic above those rooms I upped the insulation last year. Focus first on sealing ducts that run through the attic, crawlspace, or unheated basement. Find out the primary material of your ductwork. (d) At the end of the duct run, install a rectangular end cap to halt the air flow at that point. Same for duct leakage from segments in the attic. These pipes join together in one central location that permits you to run a duct down to the basement or a second-floor closet. Cut a circle similar to vent pipe end shape by a drywall saw exactly on your ceiling drywall and insert there the vent pipe. After sealing the ducts in those spaces, wrap the ducts in insulation to keep them from getting hot in the summer or cold in the winter. Every joint, every seam, in the ducting is an air leak. Attic Hatch. com, I always recommend installing an insulated bathroom vent, which is a just a normal vent surrounded by fiberglass insulation. Duct systems Waste Energy “Typical duct systems lose 25 to 40% of the heating or cooling energy put out by the central furnace, heat pump or air conditioner. Never use gray cloth duct tape because it degrades, cracks, and loses its bond with age. We have over 50000 HVAC parts available to us. Where you do make bends, limit the bend radius to one duct diameter. One dis-advantage to locating the air handler in the attic space. Bathroom Ventilation Fan Duct Routing Routing a bath vent duct down & out or up through an attic or roof & out. Hooking the Dryer Up to Attic Air Supply. (story continues below) (story continues). No thought was given in the basement to duct location. Around here we usually run ducts in attics as close to the ceiling joist as possible then the ducts are insulated with wrap R8 then insulation can be blown around and over. Personally I think that this is a really bad idea unless there is absolutely no alternative route. One way of opening those spaces to the outside would be to open an attic hatch to the home and also open a window between the home and outside. Or I can go with the X200a (8. Fiberglass insulation can be used as blown in insulation, attic insulation, wall insulation and virtually any other home insulation application including reducing sound transfer between rooms. Remember to include the duct run length and any elbows in your calculations. Air duct cleaning can help reduce allergies from dust and other pollutants. So why put an HVAC system up in the attic at all? Well, mainly it's a way to save space. Perfect example its ductwork installation in attic areas. Pull away insulation as needed to access joints and other leak-prone areas, and reposition the insulation only after the mastic dries. Tip: Damper controls, located in the basement (or sometimes the attic) control airflow to each room. comfortable home. Electric fireplaces make a great and very easy heat option if you’re planning to use your attic space as an optional living area. Think about this for a minute, your AC cools the air down to 60 degrees only to send that air through ducts in your attic that might run 120+ degrees (and that's with a radiant barrier installed). Sealing ductwork in an attic Often furnace heating and air conditioning duct work is run though an attic and then back down into the house. The only way to confirm an infestation is to run a conclusive test. You may have already been aware that heat pumps are sized by tonnage: the most common sizes are a 2 ton heat pump, a 3 ton heat pump and a 5 ton heat pump. As you run your furnace, your ducts in the already-hot attic act as heating coils. Space limitations generally rule out the use of flex duct. How To Get Rid Of Rats In The Attic - Rats are one of the most problematic pest animals to deal with for those who have attic spaces, as they can squeeze through holes that are around the size of a quarter, while they are also prodigious breeders. No Duct Work - No Problem! By Kaitlin Killian on June 1, 2015 in Uncategorized Below is an article written by our Marketing Manager, Angela DeLong, recently published in "At Home in Berks", the Home Builders Association of Berks County magazine!. Eventually, the insulation will fall off the duct work and all the water will cause water damage. fan driven) through the attic for bathroom and hood fans. You will also need a sheet metal can fabricated the same size as your ceiling diffuser opening, and another round collar tied into the end cap. We invited Bob Schmahl to give us a few pointers. Installing security camera wires inside of your house, such as the attic, soffit, siding, etc. Find out the primary material of your ductwork. It will give you an extra support. HVAC Layout & Design. Every joint, every seam, in the ducting is an air leak. Robb Aldrich, Steven Winter Associates, Inc. Return to Top. I asked if they can run from the blower outside, whatever they normally up the side of the house, through the house. New application of duct tape did not hold it for long. Here in Phoenix, for attic installs on a ~1500 sq ft house, all you need for "ductwork" is a couple of ~$100 plenums (one for intake & one for exhaust), and a few ~$30 rolls of flexi-duct. Keep as much of the ductwork span as possible inside the conditioned envelope of the home. These products are used for warm air return, supply, and exhaust systems. Installing ducts and vents in a new or existing home sets homeowners up for an easy solution to meeting their heating and cooling needs. The cleaning methods and the charges usually vary depending on the duct material type. The supply ducts bring nicely conditioned air to all the parts of the house that need it just like arteries. Have a professional check to see that your attic has proper ventilation to release natural moisture in the air. Drain and vent lines must be positioned precisely, so you should install them before the supply pipes. Homes with ducts in a protected area such as a basement may lose somewhat less than this, while some other types of systems such as attic ducts in hot, humid climates often lose more. With a flashlight, examine the attic and locate the path that you will use to run the wire between the two locations. The cost to Install a Duct starts at $9. During the attic inspection found multiple opennings on the air duct system that was cooling the attic. For single level homes, you can run it up to the attic roof vent. Static Pressure - Not Electricity. The high humid air doesn’t vent out of the house before it condensates in the duct and then runs back into the house causing damage. Climb through the attic access, using a ladder if necessary and look into the attic space. How To Get Rid Of Squirrels in the Attic: It's crucial to find out where they are getting in and out (yes, they go out for water and food). Flexible duct can also be airjet cleaned, though a camera run should be made afterward to identify any rips or joint separations from the cleaning, and fix them. Air conditioner is going to run a little bit less in the summer and the burner is going to run a little bit less in the winter. Fish a line though there if it is an easy access to your router and cut a large square/rectangular (at least 6"x6" for easy access) hole at the bottom to get the other end of the wire. Upstairs, Bob gets a look at how HVAC ductwork is assembled and run through the attic to an air handler. Static pressure in fan systems is typically less than 2” SP, or 0. Sharp bends can greatly reduce the airflow and should be avoided. I have an open spot on my air handler where I could add a duct. Supply ducts in an unconditioned attic must have insulation equal to or greater than R-6. How To Get Rid Of Squirrels in the Attic: It's crucial to find out where they are getting in and out (yes, they go out for water and food). Any new house built today should have its ductwork contained in the “conditioned” space of the house. Ducts that run through the attic need to be thoroughly air sealed and insulated. For single level homes, you can run it up to the attic roof vent. Although running a dryer duct for an electric clothes dryer through a plenum is also not a good idea, because you are effectively installing a heating device in the air intake to the system, a gas dryer vent through a plenum is actually dangerous. How-To: Run your own network wiring. With hundreds of square feet of ductwork surface area in the attic and a ΔT of 75° F, the air coming out of the vents in your home will be significantly higher than 55° F. This device, although not very efficient, allows heat recovery between remote and sometimes multiple supply and exhaust airstreams. The test in the video will show that even when the air handler is not running, air from the conditioned space is still escaping through the ducts. Running duct work and all other heating and air conditioning-related jobs are regulated by the local building codes and the HVAC industry. This often means crawlspace , attic or garage air. First check the ductwork for air leaks. Through the wall. Are you sure the duct isn't for ventilation from a range hood? Those are commonly installed in kitchen bulkheads and run from the fixture to the exterior of the home. 5 footer) and mount the whole antenna above the ducting. During winter conditions attic frost is a problem associated with attic bypasses. Run the new flexible air duct under the house from the floor return to the underside of the air handler and attach to the metal vent box, or plenum (Image 1). Portable units are very inefficient. If the range is located along an exterior wall, the process will be much easier. If you are thinking of replacing existing ductwork because it is undersized for a new HVAC system, a much cheaper solution would be running additional duct from the HVAC system to where you need additional capacity, commonly through an unfinished basement or crawlspace or the attic to avoid much drywall tearout. Remember to include the duct run length and any elbows in your calculations. Under the roof rafters and little away from any obstructions (doors or walls) the fan needs at least 1 square feet of vent space in the attic for each 750 CFM it delivers. Return to Top. Extra wear and tear on your air conditioner, since it needs to run longer and work harder to compensate for flaws in the ductwork design, leading to more breakdowns and shorter equipment life. It pretty much starts off vertical for around 1 meter and the ducting continues along the ceiling of the loft and eventually out through the eaves. It the duct is supported by the web of a truss, air is trapped between the duct and the truss. Ducts that run horizontally out of a plenum or into a boot. A dryer vent should be vented outside. For ducts that are accessible, either in the basement or attic, it is a relatively simple matter to seal leaks. Interior duct work in a fur -down system typically consists of metal or fiberglass duct board. , laying on) the ceiling and/or truss lower cords. Here, we see ducts in a dropped hallway chase at the LaHouse project. Whether ducts are in the attic or beneath the floor, insulation is installed in pretty much the same way using special duct insulation: Seal seams with metal duct tape. The next step is to insert the vent pipe. Is it okay to run Cat6 ethernet cable through the duct work? Would the temperature change cause any problems? In my case, it is so much easier running it through the duct work then trying to fish it down through the walls and floors. How to Control Air Flow in Attic Ducts Posted by Lori Lapierre on 10th Feb 2014 Adjusting the temperature in a house can be difficult; rooms facing the sun are naturally warmer than other rooms in the house, and finding a balance -- especially during change seasons -- can be tricky. But attic ductwork has persisted because the attic provides an open, convenient area for running ductwork, and because years ago, heating fuel used to be cheap. Open at least two windows and run a fan in one of them to speed up the process. We have a 5 yr Bryant 100,000 BTU furnace with 4T blower and the new ducts will be servced by this furnace. Now it’s time to go into the attic. It can be made of a number of materials. Have a professional check to see that your attic has proper ventilation to release natural moisture in the air. 1 of the International Residential Code (IRC). Chapter 8 Duct Design and Sealing 143 Chapter 8 Duct Design and Sealing Duct Materials The three most common types of duct material used in home construction are metal, rigid fiberglass duct board, and flex-duct. Duct Sealing. Ductwork that travels through areas that are unconditioned, such as in a basement or a garage can cause the system to lose heat during the winter and dissipate cool air during the summer. Ducts in direct contact with a heat-generating appliance vent. This situation will cause the AC unit to run 24/7, not cooling inside the house, and a high electric bill. Open Spaces as Return-Air Options - Code Notes Stud cavities and floor joist spaces are often used to return air to the heating, ventilating, and air conditioning (HVAC) system#s air-handler, and are specifically allowed in the I-codes. Once you find the entry hole(s), you can mount a special repeater trap or a one-way exclusion door right on the hole. We also recommended a timer be used on the heater in order to avoid nuisance tripping of the UL required thermal protection device in our products. In this article, I'll look at a variety of solutions to the attic duct problem — a topic that I first tackled seven years ago in an article titled Keeping Ducts Indoors. This swamp cooler installation will require a section of rigid ducting down through the roof with an end cap and a round sheet metal collar the same size as the flex duct. Perfect example its ductwork installation in attic areas. Make sure the studs and bays line up well enough to leave a clear path. Your vent hood will have places available for either attic or wall exhaust. ” This bad workmanship not only happens on small residential jobs, but on huge buildings as well. Fish a line though there if it is an easy access to your router and cut a large square/rectangular (at least 6"x6" for easy access) hole at the bottom to get the other end of the wire. Every joint, every seam, in the ducting is an air leak. There will be a lower cost for parts. As far as I know this is all personal preference and there is no code dictating where in the attic the ducts must be run. Putting the Duct Back in Ductless Mini-Splits A would-be HVAC designer wonders if a ductless mini-split head can be hidden in a closet and connected to conventional ductwork. If you have ductwork in the attic or the main system is in the attic, this would have to be carefully examined for leaks and sealed up. Both metal and fiberglass duct board are rigid and installed in pieces, while flex-duct comes in long sections. Addressing all forms of heat gain/loss and moisture related concerns is essential to creating an efficient, healthy, cost effective, and sustainable efficient attic system. Although running a dryer duct for an electric clothes dryer through a plenum is also not a good idea, because you are effectively installing a heating device in the air intake to the system, a gas dryer vent through a plenum is actually dangerous. • An alternative method of duct sealing is available that seals the duct from the inside. Perhaps $500 for materials, and whatever your Hvac guy wants to charge for labor (usually some multiple of his diesel-super-duty 4x4's monthly payment). Janice in Galveston, Texas found some mold in her ductwork and is curious about do-it-yourself removal techniques she can employ to. 1 DRYER EXHAUST DUCT FITTING EQUIVALENT LENGTH. You connect the rods to the brush, connect the whole thing to your drill, then send it through the ductwork, using either a vacuum or the dryer blower to blast out the loose material. If there isn't a shorter route, you will need to add an in line booster fan. You all have duct work either in your attic or crawlspace or something like that. Find quality hvac duct & fittings online or in store. Maintenance: How to Keep Ducts & Vents Clean. Learn seven steps for DIY mold removal for your ducts, coils, and drip pans. Can I exhaust the air from my range hood into the attic, roof or wall? What type of duct is best for venting a range hood? What is the minimum size for a kitchen range hood duct? What is the maximum length for a range hood’s ductwork? How high should I position the range hood above the stove? What is the CFM rate and what is a sone?. One of the hottest topics in energy efficiency and building science is "how should you insulate your attic?" Why? Simply put, the attic has more impact on your efficiency and comfort than any other single part of your home! Let's summarize why the attic is so important: The attic is the hottest part of the house in the…. You can just run it under the kitchen faucet but be sure to have a catch, so any hair or dirt doesn't go into your plumbing system and clog it up. How to Add an Air Duct to a Room step by step instructions. There's this nice air return duct that runs along the corner of my place that I. The Keys To Proper Bathroom Exhaust Bathrooms equal moisture, and the more people living in your home the more moisture there will be- especially if you have teenagers. Choose the most efficient route from your dryer to the outside. On the face of it, the answer is as simple: Run a heating duct from the attic to the basement. (story continues below) (story continues). First, all ac ducts should be vented underneath a building, instead of in an attic. Your Home is Filled with Dust: If your home’s ductwork is broken or gapping, it’s not just letting your conditioned air out, it’s also allowing contaminants to seep in. shut off humidifier for a couple of days, to equalize RH level in the heated area of the house and the attic 2. Joints 1 are attached, and the ducting is connected to vents and your HVAC system. Now it’s time to go into the attic. Make sure the studs and bays line up well enough to leave a clear path. Wire the attic for electricity. Perfect example its ductwork installation in attic areas. Interior duct work in a fur -down system typically consists of metal or fiberglass duct board. Rigid, metal ductwork offers the least amout of resistance to airflow, while insulated flexible ductwork is easy to work with and has sound-reducing characteristics. Cut a circle similar to vent pipe end shape by a drywall saw exactly on your ceiling drywall and insert there the vent pipe. That's why it is vital to identify problems in existing ductwork and plan out the most efficient labyrinth of ductwork in a new installation. In more cases than not a 3 ton AC with the ducts in the attic has a ton or so of load that's just from the location of the ducts in the attic and the associated duct gains, leakage, etc. How to Install a Bathroom Vent Fan It's the best way to expel moisture-laden air and odors, and we have step-by-step instructions for adding a bathroom ceiling vent fan By Joseph Truini of This Old House magazine. Return to Top. Improving on your Insulation. I could run this exhaust up through my attic, which is totally floored but not heated or a/c, it breathes fresh air. The return duct is under a negative pressure because the blower is sucking air back to the unit. Tips for Running Ductwork Through the Attic. Robb Aldrich, Steven Winter Associates, Inc. The presumed reader is a designer or builder who wants to know the best way to avoid the energy penalties associated with attic ductwork. Get fair costs for your SPECIFIC project requirements. There are many advantages to round ducts, from increased airflow, quick installation, and lower costs. The best approach is to run supply plumbing together in a few joist spaces. Every joint, every seam, in the ducting is an air leak. You all have duct work either in your attic or crawlspace or something like that. Another way to combat noise being transmitted to other areas of the house Another way to combat noise being transmitted to other areas of the house is to line the interior of the ductwork with a sound absorber, like Melamine foam. - The unused hot air in summer will soon be used to run through my dryer. The duct serving the hood shall have a smooth interior surface, shall be air tight and shall be equipped with a backdraft damper. - The system doesn't add outside air if sealed properly. Attic Access for Ductwork. Maintenance: How to Keep Ducts & Vents Clean. Then there's the question of pressure. wider width trumps narrow width and when properly suspended the 3" will not cause the duct to compress reducing air flow. Although much of the ductwork in your home is hidden, you can see the supply and return vents. Never use gray cloth duct tape because it degrades, cracks, and loses its bond with age. We're doing a kitchen remodel, and just hung up the cabinet above the hood. In a single-level home, the air handler unit is installed in the attic and ductwork is routed between attic joists to the ceiling of each individual room, where supply and return vents are created through small openings in the ceiling. Purchase an Energy Star Qualified Furnace. Chapter 8 Duct Design and Sealing 143 Chapter 8 Duct Design and Sealing Duct Materials The three most common types of duct material used in home construction are metal, rigid fiberglass duct board, and flex-duct. Re: new ducts to upstairs in old house Sten We've done Retro's and New Construction and run oval pipe in walls, the oval does not have to be insulated because it is in it's own space but should be taped and sealed. The differences, particularly during the heating season, point to the continued need for insulated ductwork for this scenario. Where ductwork must be routed through unconditioned zones that experience temperature extremes such as the attic, crawl space or basement, reduce thermal loss by insulating affected spans. If the insulation on the central heating and cooling ductwork in your house has seen better days, consider replacing or upgrading it to improve energy efficiency and reduce your utility bills. A heat recovery ventilator can work in a home with no ducts. Duct Distribution Quality Installation. Manual D takes each component's equivalent duct length and adds them together for TEL (total equivalent duct length). Pitch the attic ductwork back toward the dryer so that any condensation will run back toward the heated space. I asked if they can run from the blower outside, whatever they normally up the side of the house, through the house. Duct Sealing.