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41-60 of 89 Results
  1. Insulation
    I have a condensation and drip page problem where my 8" exposed circular AC duct comes out of the ceiling. Above the ceiling is the attic, meaning it gets pretty hot. As you can see in the pictures, the small (maybe 6-9") stretch of the pipe between the plenum box above and where it comes out...
  2. Kitchen & Bath Remodeling
    I found some excellent posts here on whether or not you need a duct in enclosed space under a vanity. In my old (1981) vanity, that I just removed, the air came up from the floor into the enclosed space under the vanity then out a vent in the toe kick -- no duct, it worked great. But my...
  3. General DIY Discussions
    Hi. I hope I am posting this in the correct place. Our heat vent in one bathroom is on the floor, right next to the bathtub. I try to keep it covered with a towel when our daughter takes a bath, but sometimes water goes down the duct. Just recently I have noticed a moldy smell coming from the...
  4. HVAC
    Need an expert opinion please... Our new house was custom built in 1975 and has fiberglass ducts. I opened one vent the other day and saw some dirt inside so I grabbed the vacuum and went at it gently... In a few minutes, I noticed that the vacuum reservoir is filling up pretty fast with very...
  5. HVAC
    Hello to all, and thanks in advance for your time. I have a gas furnace in a centrally located utility room. The main duct coming from the top runs up to the ceiling, then runs about 4 feet horizontally (below the ceiling) into a "T," running about 1 foot to one side, 10 feet to the other. It...
  6. HVAC
    I noticed that my contractor in one instance used something that looks like a flanged adapter to mount an exposed spiral pipe going into a square duct so that he was able to screw that flange into the flat surface of the box. In yet another instance, he hooked a non-spiral but still round...
  7. HVAC
    My AC contractor just brought some 8 and some 6 inch spiral pipe to install tomorrow. I do not trust him nor do I trust a single contractor out there, hence posting here to confirm. I am getting a 3 ton system, there are three rooms upstairs and 2 rooms and a dining room downstairs. Total is...
  8. HVAC
    Is it best to put the supply vent boot in and drywall around it or drywall first then cut out the necessary hole for the square vent?
  9. HVAC
    The video of my little problem will take about three minutes time. Comments from individuals who have knowledge and experience in designing ducts for efficient and quiet delivery would be appreciated. Here's the link to Photobucket...
  10. HVAC
    Been working on a wall with all the wiring and tubing for my central air unit above my head. Notice a humming seemingly coming right from the tubing and/or wiring. The hum starts followed shortly by the cool air blowing through the house as it should. The unit seems to work just fine, just...
  11. HVAC
    I'm trying to design an HRV ducting system and I had a few theoretical questions in regard to using a damper. I'd like to have two main trunks that come off the HRV: trunk A and trunk B. These two trunks will be pulling the air OUT of the rooms. Trunk A will serve a kitchen and two bathrooms...
  12. HVAC
    Looked through the manual and understand it to a point. Was hoping to get some "polishing" from you guys. http://www.smarthome.com/3038A/Residential-Control-Systems-001-00242-ZC2S-HVAC-2-Zone-Controller/p.aspx Could this be installed to independently control the temperature and CFM of the HT...
  13. HVAC
    Changing some things in my HVAC ductwork and have a few questions(this is all in the basement btw: 1. What's the best way to seal off a supply just use thermopan? 2. I'm also moving a return. What is the best way to cut out a new vent hole in the return trunk?
  14. HVAC
    Would a 9,000 btu minisplit unit be enough to heat and cool a 200 sqf room easy, fast, and efficiently?
  15. HVAC
    So I got some Knauf Duct Board at a very good price. However, once I got it home it seems very...fibrous. I run my hand calmly over the fiberglass portion and it feels like i'm scraping off very small particles. Is this normal? It has the intent of being used as a return plenum so air flow...
  16. Building & Construction
    So I removed the Panning for the returns and I found this going on. Is that hole there so the wall can breathe? Can I close it off? It connects to the return for the room upstairs and that is an outside wall.
  17. Building & Construction
    I'm replacing my old sheet metal returns in the ceiling with Thermopan duct board. My question is, can I place xps rigid foam board in the rim joists inside the return before putting the new duct boards up? I would seal them with Great Stuff or is that not advisable.
  18. HVAC
    Soundproofing Air Return Plenum. I have 2 air return plenums in my basement and they echo and vibrate something aweful. What can i do to sound proof them or at least stop the echo/vibration. I'll be decoupling the ceiling so that'll help but still. Also, they're nailed flush to the joists...
  19. HVAC
    Hi, I'm Brittany and this is my first post. I am planning a remodel for my two bedroom 800 sq ft house. I plan to section off the two bedrooms and make a small efficiency apartment so that I can have a roommate. I have a gas furnace with one return which is located in the area sectioned for...
  20. HVAC
    Hey guys! It's me again. This thread is a little different from last time. I had a "specialist" come in an install a duct fan. The friggin' thing is so loud though! Now, the air comes out of the vent full blast (almost) but the air isn't that cold at all compared to the northern rooms. I don't...
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