Can you install a furnace underneath a house?
In the crawl space - yes, but if you live in the a raised house I think your furnace could be easily stolen.

Can you insulate an electric furnace?
You can insulate whatever you want!

Can you insulate around power range vent?
If your vent is in the attic, then my answer is yes, you should insulate it.

Can you run water pipe through a cold air return?
Yes.

Can you split an oval duct into two?
I have never seen it before.

Can you use a dryer vent to vent a microwave?
No, just vent it separate, what's the problem?

Can you use cold vents to pick up heat from basement?
Unless your house sits on a volcano, basements are usually much colder then upstairs. So what type of heat do you intended to pick up from there?

Central heating takes an hour to stop making a tapping noise!
Then what are you waiting for? Get a solution on this page.

Connecting to ducting to above oven microwave oven.
Find an answer on this page.

Correct way to seal furnace exhausts.
Yes, I saw some weird installation where joints were sealed. They were using high temperature silicone or aluminum foil tape.

Could you tap into a basement heat duct register to add one to the garage?
No.

Distance between ERV vent pipes.
Here is a free PDF file where you can find an answer to your question.

Distance between fresh air and exhaust duct.
10'.

Do bathroom fans come with backflow preventers?
Normally yes.

Do I need a fresh air line in the cold air return with a heat pump?
Yes.

Do I need b-vent for my 80 percent furnace?
If your old furnace was vented to the chimney, then you should use a chimney liner instead.

Do pipes make a clicking noise in a two-story house when the second floor is not being used?
Well, why not? Resolve this issue on this page.

Do you include basement in furnace BTU calculation?
Normally, yes.

Does a cold air intake on furnace increase efficiency?
Absolutely!

Does a furnace condensate if it does not have a humidifier?
If this is a condensing high efficiency furnace it will condensate.

Does a gas-fired heater produce booming sound?
Normally not, yours requires a repair or maybe even a replacement.

Does duct insulation in an unconditioned basement save about the same amount of energy as exterior wall insulation?
I do not think so.

Draft inducer motor bearings went bad heat exchanger cracked.
I'm sorry to hear that, buy a new furnace. Buy it and get step-by-step guide how to install it on this page.

Ducts under house making noise when heat goes on and off.
Well, find a solution on this page.

Ductwork riser/offset what is the difference?
In general, riser, it's when your duct goes up or down or if you are mitering a smaller dimension (In 24 x 8 duct, its 8").
Offset, it's when your duct goes to the left or to the right or if you are mitering a bigger dimension.

Easiest way to cold air return metal panning.
You can use thermo-pan and staples.

Energy saving tips and explanation.
Yeah, I have quite a few of them, check them out here.

Fasten panning to joists.
You can use 1" sheeting nails or ¼" zip screws.

Fitting ductwork pictures.
You can find pictures of all fittings you want in Chapter Materials of my Ductwork Installation Guide book.  

Fixing a squeaky draft inducer.
Just replace it.

Fixing popping noise in plenum.
Get info on this page.

Furnace filter got sucked into blower area.
Maybe it’s too dirty, and now you may need to replace the blower wheel. Buy one on the right or on the left.

Furnace keeps turning off fan sounds like water inside.
Tunings, condensate trap or condensate pipes might be clogged.

Got a new furnace motor, when it runs it rattles the floor, is this normal?
No, you should balance it.

Heat pump P-trap, should it be dry in the winter?
In the wintertime, you do not have condensate, so a p-trap may dry out. In general p-trap should be installed if an evaporator is installed on the intake side of the air handler. If it’s installed on the supply side p-trap doesn't allow air to escape through the condensate line.

High efficiency furnace installation pics.
You may find a lot of photos on this page.

How big does a sidewall cold air return vent need to be?
What is a sidewall cold air return? But in general cold air returns range from 14" x 6" to 48" x 6", sometimes by 10". And you can buy some on the right or on the left.

How can I make my furnace 2 zones?
Just to add one! If you do not know how please visit this page.

How do you build a duct heating system books?
I do not know too many books for this topic, but on my site, you can find some of them on this page.

How do you install a heat pump gas exhaust?
I have never heard about a heat pump gas exhaust, cause it is electrical, do you?

How do you tell the difference between the return vent and the supply vent?
Supply vent must have adjustable louvers.

How far apart should I place my heating vents?
Normally we put them under each window.

How far away for cold air intake should fireplace vent be?
10".

How far does a sofa need to be from a return vent?
I think 1" - 3" is fine.

How much space does a 120000 BTU furnace heat?
The right answer to this question is - you should do a load calculation. However, there is a rule of thumb: 1 BTU for 35 square feet. That means that this furnace is good for a 3430 square feet house.

How to branch out ductwork from my furnace to heat my garage?
You cannot do it, because it's illegal.

How to connect s-cleats ducting?
I have a Chapter #40 in my Ductwork Installation Guide book where you can find info for this topic.

How to find out an offset formula?
It is extremely simple, just go to this page and get all the info you want!

How to increase airflow in bathroom wall registers?
Balance your system with the pipe dampers.

How to install duct boot in drywall?
I have a Chapter in my Kitchen Remodeling Edition book dedicated to this issue.

How to lubricate high efficiency furnace?
It is permanently lubricated.

How to make a double offset on sheet metal duct?
If your question is about making an offset and riser from the same piece of duct, the answer is here on this page.

How to make a room warm that does not have a cold air return?
I have a video #6 on this page dedicated to this issue.

How to replace draft inducer in Carrier furnace?
Watch a video on this page. And buy a draft inducer below.

How to replace furnace pressure switch?
Watch a video on this page. And you can buy one on the right or on the left.

How to secure end cap on rectangular duct?
There are two types of end caps: end caps for S-cleat drive-cleat connection and slip-on end caps. In the first case you should use S-cleats and drive-cleat, in the second one - a bottom punch or ¼" zip screws.

How to troubleshoot noisy heating ducts, rushing air sound, return air?
Find info on this page.

How to work with ductwork?
Purchase my Ductwork Installation Guide e-book and find it out for yourself

I have a chance of getting a Bryant plus 80 down flow furnace, I need a upflow one to replace the old junker in my house now. from what I see the Bryant might be able to be converted to upflow but not sure. the model of the Bryant is 376CAV048115 serial 1596A10205. it looks like I can take the blower that's on the top now an mount it under the heat exchanger so it blows the hot air upwards into the duct work. but maybe not?
Only allowed configuration is down flow or horizontal left or right. Not allowed to be upflow.
1996 model? Its pretty much a junker too. Not sure why anyone would sell an 80% furnace from 1996 with no warranty. Even less sure of who would buy a 20 year old unit for their house.

I have a small gas leak in my furnace do I need a new furnace.
Maybe you have to replace a gas valve. Buy one below.

I have loud noise from air units in my attic but I seem to be the only one who hears it, why?
Direct this question to your shrink...

I haven't had my furnace inspected in 5 years.
And I haven't had my furnace inspected in 12. So I have more chances to be listed in the Guinness book.

Is a rounded elbow better for airflow on furnaces?
Round elbow is always better then a rectangular one, but if your question is about a cold air boot, then you should use a rectangular one.

Is it ok for my exhaust on my high efficiency furnace to build a lot of condensate?
Well, if it runs through unconditioned space then yes.

Is it wise to close off heating and air registers in order to reduce energy costs?
Absolutely, however you may need get more info on this page.

Is mold normal just above the air conditioner coil main duct?
Of course not!

Is there a bad spot to put a cold air return in a furnace?
Yes, it’s not a good idea to put it at the back side of the furnace's jacket.

Is there a p trap under my furnace?
Unless your high efficiency furnace is installed horizontally it should be inside.

Is there anything that can be done to make ductwork stop making noise?
Yes, and you can find a solution on this page.

Lack of return air causing condensate blow off.
No, it's rather the one-sided path of air making this happen, but get more info on this page, BTW it’s free.

Leaks around air return at furnace entrance.
Seal it with the duct sealer or silicone. Buy it on the right.

Long running furnace hurt heat exchanger?
Bad chambers are usually related to the age of the unit. Expanding and contracting of the metal over time will rust it.

Magnetic register covers to shut off' forced air furnace registers in unused room.
You can use them, but you should use them wisely! Get more info on this page.

Moving gas furnace to the basement and running ducting to the two-story house.
My God! It's what my Ductwork Installation Guide e-book is all about!

My air ducts run from a silver foiled box.
Right, they named it plenum.

My cold air return for the furnace is on the wall on my bottom level, does this mater?
Well, it's not the best place for your cold air return, but what else can you do?

My high efficiency furnace cycles on and off a lot is this correct?
No, re-read your thermostat manual again.

Pictures of how to make an offset on ductwork.
On this page, you can find them a lot.

Problem with hvac, one thermostat is controlling both zones.
This is wrong you should have two. Buy one on this page.

Should you put filters on your heat vents?
No.

Terrible furnace installation photos.
If you got a "Terrible furnace installation", take some pics and send them to me. I will publish them on the "Wall of Shame" or "Wall of Ignoramuses" pages of this site.

What happens if I oversize my air handler?
It will short cycle, and it won't remove enough moisture.

What happens when you block off all heat vents?
Are you crazy? Just turn off your furnace!

What kind of drill bit do I need to drill through a duct pipe?
Drill bit for metal.

When furnaces are in crawl spaces and attics, where is a humidifier put?
In the crawl space and in the attic.

If you are unable to find an answer to your question, try links to the other pages of this kind below.
Please follow the links provided on these pages, they would lead you to the free or paid pages on my site or even to the other sites where you can get your question answered!
If you are still cannot find an answer to your simple question, just ask it on this page.
If your question requires more than simple "Yes" or "No" or one sentence to answer, please ask your question on this page. Price for the question is only $1.34 and if I have already a paid page with the answer to your question, you will pay nothing. If that page is pricier that $1.34 you will pay for the page, but I will refund your money back to your PayPal account.
If I do not have an answer to your specific question, I will refund your money as well.

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