(Heating, Ventilating, and Air Conditioning) For questions about installing, repairing, and troubleshooting HVAC systems.
3
votes
1answer
3k views
How should I wire this White-Rodgers fan and limit control? What about the thermostat?
I have a wood-burning stove, that is used as an auxiliary heat source in the house. There's a regular electric furnace, and adjacent to it is the stove. The warm air duct (out) from the stove ...
2
votes
3answers
2k views
Why is my furnace blower noisy when it starts?
The blower of my furnace makes a loud noise every time it starts. I understand that a large fan and the movement of large amounts of air will produce some noise. What I am puzzled by is the noise that ...
16
votes
1answer
1k views
10
votes
3answers
3k views
Is running ethernet cable through an air return allowed under US code?
I'm looking to wire up the second floor of my house and the cold air return provides a convenient, straight run from the office to the utility room. Is it safe and within code to run ethernet cable in ...
7
votes
2answers
382 views
Is there any legitimate reason to have a direct vent between utility room and attic?
I've been doing some sealing and insulating in my attic, and discovered a purpose built vent directly from the utility room into the attic space. See most of these photos
The house is in a ...
5
votes
2answers
448 views
How to best keep floor vent by shower dry/mold free?
We just moved into a rental home. It turned out after living there for a few weeks that we discovered the vents were innudated with mold. They were so bad the landlord had to replace all the vents in ...
5
votes
2answers
2k views
How do I install a wood stove as an auxiliary heat source?
I have a house with a forced air electric furnace.
We've also got a wood-burning stove adjacent to the furnace. I didn't have it installed, and I want to understand if it's been done properly, and ...
4
votes
2answers
331 views
Can an HRV replace the air exhausted by a range hood?
I'm in the process of buying a 1950s ranch house. It doesn't have the greatest insulation, so I'm planning to do some improvements over the first few years to tighten things up. I'll certainly do the ...
5
votes
2answers
2k views
Is it OK to have heating registers and returns near the ceiling?
I've got a question about a new house - a friend of my mother's is buying a new place and when she did a walkthrough (before the drywall was up), she noticed that all the heating registers and returns ...
3
votes
3answers
12k views
Why is my furnace blowing cold air?
My HEIL 7000 natural gas furnace has stopped working what are the most likely causes, and how to verify faulty parts?
Normal operation routine
Thermostat sends "need heat" signal.
Exhaust blower ...
3
votes
2answers
2k views
How do I install a jump duct?
Our master bedroom is considerably warmer than the living/dining/kitchen area of our house, and we've been setting the thermostat quite lower than we'd like in order for the bedroom to get cool enough ...
3
votes
4answers
3k views
How often should I run a bleach and water solution through heat pump lines?
How often do you need to run a bleach and water solution through the heat pump lines to keep the bacteria away?
What are the recommended parts (e.g. 1 part bleach, 10 part water) ?
2
votes
1answer
1k views
Why won't my Heil 7000 natural gas furnace ignite?
I have a Heil 7000 gas furnace
Model: NUGK100DH12
Serial: L933050100
When we turn it on at the thermostat, the exhaust blower will kick on. We checked to be sure the gas is reaching the unit and ...
1
vote
4answers
2k views
Are there efficient ways to provide combustion air to heating appliances?
In a previous question we established that there probably should be a vent between my utility room (which opens into the kitchen and living space in general) and the outdoors (in my case the attic, ...
