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66 views

What should we do about asbestos tape on heat ducts?

My daughter just had a home inspection of a home from 1900 and there was asbestos tape noted on the seams of the duct work. What should we do? And I am assuming it is not only on the visible ducts. ...
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1answer
107 views

Why would only 1/3 of my registers be blowing warm air?

I have a Coleman gas furnace in a wall space in my house which somehow shares the blower on my a/c unit on the roof because it turns on when furnace is called to start, though it does bump up after a ...
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1answer
122 views

How to run duct work for basement dehumidifier?

Our basement is partially finished, approximately 50/50 in terms of square footage. It was used as a mother-in-law suite at some point by a previous owner. The finished rooms are air ...
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1answer
104 views

How to fill / seal in-slab hvac ductwork?

My house is built on a slab. Within the slab are "channels" which act as ducts for the HVAC system. I assume it is partially lined with metal but based on photos from an HVAC-cleaner, it's hard to ...
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1answer
232 views

Will splitting a duct to extend HVAC to an addition cause problems?

I'm building a 15 x 26 addition off of current family room to use as a music room. The family room has 2 vents(registers) where the family room meets the new room, and because of convenience they ...
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122 views

Adding vents to duct?

My house has forced air HVAC. When I finished the basement, I used a closed cell foam insulation that worked very well. The basement will get only 8 degrees cooler than the first floor during a time ...
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0answers
31 views

Duct ends behind jacuzzi tub -verify and close or move?

I've wondered for years why our 1st floor bathroom is so hot. I got a temperature gun yesterday and checked, after the heat being on for 30 minutes the inside of the tub read 120. I had to figure it ...
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0answers
18 views

What cleaners are there in the market to use for Air duct duct cleaning?

My house is near to the mountains so I' am unable to get any help from Air duct cleaning Denver experts as they are unable to come over my house. Can any body suggest me some cleaners used for air ...
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0answers
18 views

How do you apply the Equal loss friction method when your furnace has extended plenum in two directions?

My furnace has the extended plenum in two directions (one main duct goes to left, the other goes to right) Do I have to calculate one longest path for each of these extended plenums?
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0answers
96 views

Can I cut out the sill plate to pass a duct through a load bearing wall?

I need to pass an HVAC duct through a load bearing wall into the basement below it. I can't seem to find a code reference in IRC for what I am allowed to do with respect to notching or cutting away ...
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0answers
390 views

Where to buy plastic (temporary) air ducting in the UK?

Does anyone know somewhere (ideally online) I can buy plastic air ducting? The stuff I'm talking about is what they used on Mythbusters to make that helium 'airship'. It's just a large diameter tube ...
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0answers
128 views

Would increasing the size of the A/C duct for my kitchen improve cooling?

As part of an ongoing kitchen project, I'd like to relocate the existing a/c register in the ceiling (which is located next to an interior wall) to the center of the room and upsize the duct (and ...
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0answers
17 views

Can I use the following parts to create a remote duct temperature sensor for my thermostat?

Parts: DS18B20 Temperature Sensor (PDF) or TMP36 Temperature Sensor (PDF) Cat5 cable Would those parts make a viable replacement for a remote duct sensor replacing a Venstar Remote Duct Digital ...
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0answers
36 views

How do I measure the size of a duct that runs through a finished wall (the register end is accessible)?

I am trying to redo a Manual D for my house (heating mainly). I can pretty much determine the length of each run but I can't figure out the exact size of the ducts that are already installed The ...
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0answers
75 views

Do I need a damper on both ends of the ducts on my kitchen range hood/extractor?

My new kitchen range hood is compatible with both 3-1/4" x 10" rectangular ducting and 7" pipe ducting. It includes a damper for the 3-1/4" x 10" format, and an adapter plate for 7" - no damper was ...
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0answers
51 views

What could be the reason why all my registers at foundation slab level have weak air flow?

In the picture below all the ducts that have a long leg going toward foundation have weak air flow. Read the details on the picture Could anybody tell me what is the problem with these guys? The ...
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54 views

Lint when running AC

There seems to be a lot of lint when I run my AC unit. I have recently replaced the filter and made sure that the filter is put in correctly. What could be the issue?
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39 views

Asbestos in close proximity of floor repair

I have a floor repair to make in a 1950's home that had the large in floor central heater installed that has long been removed. The owner wants the grate removed and flooring toothed back in, matching ...