Questions tagged [forced-air]
The forced-air tag has no usage guidance.
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Hardware issues with 2 series condensers with heat pump in heat mode [migrated]
I am planning to use a second heat exchanger to added inline to remove heat from a standard mini split heat pump system. The refrigerant will flow from the compressor to an added water coil exchanger, ...
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Honeywell T-10 fan will not stay on after cycle ends
I just installed a Honeywell T10 Thermostat to replace a Honeywell T5 that was professionally installed with a brand new HVAC unit four years ago.
The HVAC at this home is a bit unique in that it is ...
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HVAC flue vent making weird noise
My HVAC system is forced hot air, with natural gas. The flue vent is making a weird noise when it's on, kind of like water sloshing around.
It's hard to describe the noise, so here's a video (it's a ...
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Choosing Where to Place Forced Air Wall Heaters
I have a small home ~800 sq ft in a mountain climate that gets quite cold in the winters (10s-20s F in the day in the winter). I already have a pellet stove but the other existing heat comes from two ...
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Gas fired Forced-air furnace has a outlet grill in the mechanical room - can I remove it?
I just moved into a house with a gas fired forced-air furnace. Whenever I'm in the basement and the furnace is running I can hear a whistling noise coming from the mechanical room. I traced this sound ...
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What could be damaging my furnace control board and/or what can I do to protect it?
I had an issue with a damaged control board a few months ago, replacing it worked, details here: Is it the control board or is it the induction fan?
A similar issue has now came up.
It's hit or miss ...
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How do I add a filter to the return air vent of my retrofitted forced air system?
I have a 1940 home with a basement and a forced air heat pump system that was added some time in the past decade by the previous owner. The ceiling in the basement is open, and the ducts were ...
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Cracked Heat Exchanger Carbon Monoxide
If there was a crack in a heat exchanger in a natural gas forced hot air furnace, would it trigger a Carbon Monoxide detector to go off?
This is NOT happening in my house. The reason why I am asking ...
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Is it the control board or is it the induction fan?
I've got an older Goodman (GME80905CXAB) that doesn't seem to heat. Blower motor turns on just fine for cool but not at all when there's a call for heat. I can confirm ~120 volts are going into the ...
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Can I configure a two-stage thermostat to manage two heat systems?
The System
I have a relatively simple system. It starts out with a standard, run-of-the-mill Rheem gas forced air setup with central air. One transformer in the furnace goes to one thermostat like ...
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How to calculate efficiency of old Westinghouse furnace VS new variable speed Furnace
We have an old Westinghouse Forced Air Furnace (model FGUB137EG). It's been working fine, with the occasional pilot lighting issues since we moved in 6 years ago. We've been thinking about adding ...
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Integrating existing Hydronic Radiant with new Hybrid (dual fuel) Heat Pump (forced hot air)
I have an existing simple Hydronic baseboard radiant forced hot water heating system running off of an Oil Boiler. I am adding a duel fuel (hybrid) heat pump to the house.
Here's what I want:
When ...
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FAU Removal and Storage
I'm looking to move my FAU in a few months to the attic, but right now I need it moved out of my basement for a remodel. Can an FAU be stored in this manner for short term? Logic leads me to think so, ...
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Thermostats with or without variable temperature differential (swing)
I am looking at replacing my thermostat, and don't really need or want one with geosync. I am thinking of the honeywell RTH9585wf. Currently I have a lux that is not wifi but programmable. It ...
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Alternatives to forced hot air in-wall units
My condo came with in-wall hot air units with a fan (one for the bedroom, one for the living room).
I am very unhappy with this heating system and am looking for alternatives.
It is very noisy (to ...
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739
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Return plenum too big for air handler?
I am currently in the process of changing the air handler and heat pump in my house. I am working with a friend's father who does HVAC for a living. He came over and looked at my HVAC system and gave ...
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Aquatherm - thermostat is dead. What to check?
(Thermostat: White-Rodgers 1F80-51
Heating Unit is aquatherm, XUAQ22-2, this is a heat exchanger hanging off a hot water heater, and giving us forced air heat for a 500 sqft space. Unit and ...
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Forced-air heater for old floor registers
I have an older home which used to be centrally heated by a furnace in the crawlspace, but has since been retrofitted with forced-air wall heaters: Some of the wall heaters are in inconvenient ...
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Do I need a special thermostat to take advantage of a modulating gas valve?
I just had a high efficiency condensing gas furnace installed. I feel like it was done poorly, but I'm not sure. Some questions I'm wondering about are:
Do furnaces need to be level? It is visibly ...
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How to seal joints in ductwork when tape is not an option
The duct-work in the basement for my forced air heating system has been modified at various points over its long history and as a result had quite a few leaks when I moved in recently. I used foil ...
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Why is my thermostat turning the heat on too soon?
I have recently come across an issue with my thermostat and when and how my heat comes on.
My thermostat seems to be an old round Honeywell. I set my temp at 65 typically. As of last night my ...
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Which thermostat for both forced air and baseboard heating [closed]
I recently purchased a Bosch 2 stage central a.c. with a heating inverter. I have baseboard heating and but have a large and opened family room so didn't want to run more pipes. The Bosch will work up ...
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How can I reduce noise from tenants coming through my heating duct?
I live in an old house with a wood frame and forced air heating. My family lives upstairs and we rent out the bottom floor. My problem is that the sound from my tenant's bedroom travels directly into ...
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Gas Furnace only, is Y wire needed?
I have force air (propane furnace). I would like to upgrade to a new "smart" thermostat, but they didn't run a C (common) wire which is required for most of these units to run properly.
I do however,...
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Forced hot air and mini heat pump
I recently bought a house and I have forced hot air currently. It works fine, the only issue I have with it is that it constant turns on and off. I've been looking into mini heat pumps and they seem ...
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How much clearance does my furnace intake need?
The furnace in our teeny tiny new house is in the most awkward corner. If there wasn't a furnace and air intake right there, we would absolutely put a coat closet in front of it. That is obviously a ...
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What is this brown stain around heat vent?
What is this brown stain around the heat vent in a 1970's home that I recently acquired? Is it rust? This is on a lino floor. It doesn't have a significantly different texture from the surrounding ...
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How to seal around ceiling duct?
We were painting our ceilings and removed the register for the central heating system.
The hole is roughly cut. And I can see right through to the attic along the edges between the duct and the ...
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Fixing an unsealed drip tray
So, when my air handler was installed, it seems like they didn't even bother properly connecting the drip tray. While the blower is on, I can feel air blowing out around the drip tray (downstream/...
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Least Destructive New Heating System? Hot Water or Air?
I'm having some issues with my current steam heating system. I'd rather get it replaced with a whole new system, either forced hot water or forced air. The house was built in 1916, so I'd have to do ...
user44111
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90 degree angle in air conditioning ducts, should I avoid them?
I have forced air at my home and air ducts run pretty much straight. However I want to add bathroom in the basement and because of low ceiling hight, the main air conditioning duct has to be re-routed ...
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How to Lower the Ouptut of Oversized Furnace
Questions
I would like to lower the output capacity of my furnace if possible. How can I do this? Is it worth doing, or should I just live with it? Is there an easy way? Some ideas: replace burner ...
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How do I reduce the noise from my forced air furnace?
We recently had a new forced air furnace and return installed. The unit works great, but the return (which is in an adjacent closet to the furnace closet) is quite loud. What are some solutions I can ...
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Heating zone not working when other 2 do
I have three zones of forced air/baseboard heating in my house. I had the furnace shut off for the summer and after turning it back on, two zones in the house work and one does not. Any tips on how ...
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Forced air system blowing cold air through bedroom vents, hot through the rest
I'm in a rental house for the next few months which hasn't been particularly well maintained. It does have a newish looking Goodman gas furnace, yet the gas bills seem outrageous to me ($250 per month ...
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Why is the upstairs a lot hotter in a 2 story duplex?
I've lived in my current duplex for about 5 years now and every summer, my upstairs portion of the duplex gets noticeably hotter than downstairs. I couldn't give an exact measurement but 10 degrees ...
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Should fan on heat pump be delayed turning off when system stops?
I have a heat pump system with emergency heat. I have a Honeywell RTH7600D thermostat. When the heat is running and I turn the temperature down, the system immediately stops. Isn't this inefficient ...
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Air deflectors on floor registers and cooling efficiency
I was once told by an HVAC technician to avoid using air deflectors on floor registers during the summer. The reason was that the last thing you want to do is to direct the heavier, colder air ...
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Does lowering the blower speed of a forced-air furnace lower its efficiency?
My gas furnace has two options for the blower speed: MED, and MED-HI. It had been set on the higher speed, but that was too harsh, so I lowered it to the slower speed. Does that have any impact on the ...
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What tape should I use to seal leaks in forced air heating system?
I have some of this duct tape Nashua 557 Premium Grade Flex Duct Tape. Is this the correct stuff to use to seal leaks in a forced air heating system, or is there something else I should be using?
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Do thermostat-controlled, auto-adjust HVAC vents exist?
The residential forced-air HVAC systems I have seen are controlled by a single thermostat in one room. One has to manually adjust the vents in order to adjust the temperature in other rooms. Is ...
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