List of Simple Questions 10

On the List of Simple Questions page and on the others alike (see links to them below), you can find answers to all spectrums of issues this website is dedicated for!
If your search engine sent you to this page that means, that a similar question was asked before and you will be able to find the answer you are looking for.
Some of the questions are simple enough and you can find answers right here on this page.
The others are more complicated and I provided links to the pages on my site where you can find free information.
For the third part of the questions that are not that simple, as you may think, I provided links to the paid pages or books on my site.

So, please scroll down, find your question and good luck!

Basement fresh air intake making basement cold.
Well, you are probably talking about the combustion air intake. There are at least two ways on how to reduce it that I know of. First of them, you can find on this page. A second one you may use special motorized dampers manufactured by Hoyme.

Best place to put a furnace.
The best place to put a furnace is in the middle of your basement, but it is not always practical especially if you want you basement finished.

Can a dirty filter cause the black around my heating vents?
Yes.

Can a gas line touch a furnace duct?
Yes.

Can a heat vent be placed right above the cold air return vent?
Here is a free study for this topic on this page.

Can cold air return be installed vertically?
No, and it doesn't make sense anyway.

Can exhaust vents for two stages heating be place near a window?
Yes, but you have to read the installation manual. For example, Carrier allows you to install it 1' from an operational window, but Reem 4'.

Can forced air system be made quieter?
Systems with variable speed motors are very quiet.

Can I add a PVC vent to my cold air return for outside air?
You can add whatever you want; after all it’s your house.

Can I cut a cold air return on the lower part of my return to my furnace?
I do not think that code addresses high efficiency furnaces, but for 80% efficiency and lower, it must be at least 10' away.

Can I drain my furnace in the crawlspace?
No, you should use a condensate pump, route the tubing in the crawlspace, drill a hole in the sewage PVC pipe, stick the tubing in it, seal with silicone and fasten it with the electrical black tape.

Can I get ill from a furnace vent?
If it's back drafting then yes.

Can I install mini split system 3 foot off floor?
Yes.

Can I move a cold air return in my dinning room without hurting my furnace?
Yes you can, but turn the furnace off first.

Can I put metal screen in my air vents in the floor?
Yes, you can.

Can I use galvanized 6" duct pipe from stove to chimney?
If the installation manual allows it, then why not?

Can I use rectangular duct if a range hood calls for 8 inch round?
Yes, but it must be at least 14" x 3 ¼”.

Can the furnace run with the condensate pump shut off?
If you are asking about a condensing furnace, then no.

Can the hole in your cold air return be too small?
Yes.

Can the ticking noise come from inside the gas pipes?
No. BTW, I have never heard gas pipe ticking.

Can two furnaces utilize same ductwork?
Yes, they name it twined furnaces.

Can you cut a cold air return in basement on plenum?
If you have one then why not?

Can you cut in to the side of the plenum to install a vent?
Yes.

Can you open or close fireplace outside air intake?
Usually this kind of air intakes does not have dampers.

Can you plug your cold air return in the winter in Colorado?
You are probably referring to the fresh air intake. You can plug it if you do not use your bath fans and kitchen exhaust.

Can you put a cabinet over an air return kitchen?
No, because there are not suppose to be any cold air returns in the kitchen. However, if there is you should move it on another side of the wall or to another wall.

Can you use flexible gas duct for furnace exhaust?
Yes. Get more info in Chapter #49 of my Ductwork Installation Guide book.

Can you run a dryer vent through a cold a return?
Yes you can, if there are no any connections, but I would suggest to silicone the seam anyway.

Can you vent a microwave to the garage?
Well, I think this is the brightest idea from the invention of the sliced bread! Any time you come back home you will know what your wife is cooking!

Clothes dryer hooked up to wood furnace.
I think this is a wonderful idea! You will supply preheated air with lint in it right to the burner chamber and save! However, please keep it a secret.  

Connect bathroom fan to furnace vent.
I think that this one is also a bright idea! This way you will mix your stink with the carbon monoxide one and as a result everyone in your neighborhood would think that you are an alien from another planet!

Do furnaces remove moisture from the air?
Well, it is not actually removing it. It just reduces the RH.

Do I need to keep ac ductwork short in length?
Yes, but make sure not to kink insulated flex if you are using it for your project.

Do you have to vent gas furnace at floor and ceiling?
I assume that your question is about combustion air intake. Yes, in code they require combustion air intakes in 12" off the floor and ceiling. However, most of the inspectors understand that this is BS, and for residential they allow you to have only one 12" off the floor.

Do you need cold air returns with a down draft electric furnace with a heat pump?
Yes.

Do you need to put a heat register in the kitchen?
Absolutely, if you want to now how, please visit this page.

Does a draft inducer motor supply and exhaust air at the same time?
Yes.

Does a furnace cold air return duct have to be ducted to the heated air space of a home?
Yes.

Does adding a cold air return help with a cold basement?
Yes, it does, but adding a heat run is a must.

Does cold air venting make your old furnace more efficient?
Yes.

Does my crawlspace have to be vented if there is a gas furnace?
No, but if there is an 80% efficiency furnace you should provide combustion air intake.

Does the draft inducer motor get air from your basement or the outside of the house for combustion air?
For most of the high efficiency furnaces, it gets a combustion air from outside, for some of the high efficiency furnaces and 80% and lower it takes air from inside of your house.

Does the exhaust pipe from a gas furnace in an attic need to be connected to a duct, or is it okay if the exhaust just goes into the attic?
Not sure what you are asking, but it is not okay to exhaust into the attic.

Down flow furnace, now floors are cold how can I heat the floors?
If your house sits on the crawlspace, seal it 100% and cut in a couple of 10" x 4" supply registers.

Duct calculation formula.
I have a free page dedicated to this issue.

Duct sealing technology, which seals the ducts from the inside with a latex-based spray -- will soon be commercially available.
I am not sure if this is a statement or a question; anyway watch some videos on this page.

Ductwork, how many elbows is too many?
Well, every elbow adds up 10' of resistance to your heat run, so go figure.

Eliminate furnace media filter whistling noise.
Get info for this topic on this page.

Forced air furnace duct calculator.
Watch video clip #4 in the HVAC Ductulator video player.

Forced air heating noise dampening.
I have a free page dedicated to this issue.

Free images of hvac dustings.
Well, I have a lot of them on this page.

Furnace installation heat loss calculations.
Get a free manual on this page.

Furnace ticking noise in ductwork.
Find a solution on this page.

Geothermal heat pump problem with low humidity in winter.
Because a geothermal heat pump produces low temperature heat I would recommend you to install a steam humidifier. Buy it on the right or on the left.

High-energy furnace air intake pipe frozen with water what is wrong?
Well, this is impossible. However, if you have a similar issue go to this page and send me some pics of your PVC pipes, especially from outside. 

How big should return ducting be for a furnace?
You can calculate it for yourself on this page.  

How can I connect ductwork in my home when pipes don't line up properly? After almost three decades in the business, I do not know how to respond to the question! Could you just line up them properly and make a connection, otherwise take a picture and send it to me from this page.

How can you tell if you microwave has a duct?
If it's not blowing air out in your face, then it probably has a duct. Can you just open the cabinet's door above to actually see it?

How do I fix my high efficiency gas furnace condensation dripping from exhaust PVC vent?
Find a solution on this page.

How do they make the locking ductwork?
You can use a bottom punch hand tool for that. Buy it on the right or on the left.

How do you install a pipe to bring in cold air into the cold air return for the furnace?
Yeah, I have a page on my site dedicated to this issue.

How far apart should duct take offs, be on the main trunk duct?
They could be just next to each other.

How far apart should intake and exhaust be on direct vent furnaces?
2" between pipes, and 12" between openings.

How high off the floor do you mount a thermostat?
In a residential application - 5', in commercial - 4', if a handicap person lives in a house - 4' also.

How is heating ductwork determined in a home?
Learn how to do that on this page.

How many air ducts are there in a 2-bathroom house?
In a 2-bathroom house?!? What's the shit town you are from?

How many feet apart metal duct should be supported?
Trunk line - 4' - 5', pipes 5'- 10'.

How much to install furnace with 120000 Btu 2 stage?
Here is a website http://www.hvac-cost.com/, try to find info on that site.

How not to pay for sloppy work on my new furnace?
Send me some pics of the installation and if it's really bad I'll tell you what to do.

How to add cold air return on new addition?
In order to find an answer to this question I would recommend you to purchase the "Basement" part of my Ductwork Installation Guide e-book. By the way a visitor who found my site on the web with this question already did.

How to build ductwork to fit existing plenum?
There should be a starting transition between the duct and plenum installed.

How to close off exhausts ductwork?
Just cap it.

How to control cold fresh air intake vent to furnace in winter?
You can get info for this topic on this page.

How to cut registers in spiral pipe?
You can find answers to your question on this page and in Chapter #57 of my Ductwork Installation Guide book.

How to cut top plate oval duct hvac?
Nail a top plate to the joists or rafters if it is not already nailed, mark an opening and cut it with the saw-zall. Need a saw-zall? Buy it on the right or on the left.

How to fix ductwork being sucked in and popping out making a loud noise?
Get a solution on this page.

How to fix ductwork popping noise when basement ceiling is drywalled?
You should read on this page, there is a lot of info for this matter.

How to hang heating ducts so they do not make noise?
Well, this is a good question! I saw a lot of ducts some of them were making noise and some of them not, but they were installed the way they should!?! Furthermore, sometimes noise coming from the pipes and take-offs also. So, read on this page and decide for yourself.

How to make an offset in metal on the field, formula how long a piece of duct is need?
You can find all answers to these questions on this page.

How to solve noise in furnace and duct in bungalow?
Just read on this page and find a solution there.

How to vent garage heater through vinyl siding?
You need 1" clearance and that's all. Get more info and pics on this page.  

How to work with round heating duct?
I have almost entire Ductwork Installation Guide e-book dedicated to this subject, but if you want it on a cheap side, please visit this page.

Hvac filter cabinet causing humming noise.
Get some free info on this page.

I don’t use part of my house. Can I shut off the registers to that part of the house to save energy?
Yes you can and you should, but read on this page first.

I feel sick after installation of gas furnace.
It's probably back drafting of the exhaust pipe leading to the connection being wrong.

I got this question from Kuala Lumpur, Malaysia: How to steal electric using a contactor?
Well, I'm not an electrician, so I do not know the answer to this question and I'm not sure if I want to know...

I live in a home with vaulted ceilings in the main living area. it’s a great room concept. All the heat run to far wall floor registers. A lot of windows on that wall as it’s an outside wall. The rest of the room gets cold because all the heat goes straight up. The room stays cold. I want to add a run on the other side of the room (interior wall) but I am afraid the same thing will happen. Any ideas to spread the warmth through the room?

Install low cold air return.

I removed all dampers in ducts in my attic will there be a problem?
Well, I think it would be better to ask this question before you did something to your system, but not after. The good news is: now you are going to see for yourself if there is a problem or not.

It is a supply duct that is connected to the furnace.
1) What is inside the pipe (which is about 8-10 inches diameter)? I think it might be rattling because my new furnace fan is much more powerful than my old one, but I can't be sure the thing stuck inside is causing the rattling until I get my hands on it.
2) Should I remove what is inside the pipe?
3) How can I do that? I was thinking of cutting open the drywall and the pipe and patching it back up.
It is a single stem mount damper, every pipe should have one and usually does so the system can be balanced. It looks wide open and I would leave it alone. They can rattle and there is a handle on it which usually has a nut you can turn it a bit and tighten to stop that.

I want to add an Aprilaire 700 to my Trane XR95 furnace that has a cased A-Coil.
The only place on the supply duct big enough to put the 700 (or any other humidifier) is on the side of the cased A-coil. The dimensions are fine and it looks like there would not be any interference.

If a furnace is installed in a closet how big should the pipe be to bring outside air in for combustion?
6".

If I cut off my furnace at the thermostat, does it stop a potential gas leak?
No.

If your blower wheel is off balance is it bad for your furnace?
Yes.

Install fresh air combustion vents to your furnace room to minimize drafts through the entire home.
Well, this is a good idea, just install it and be done with it! Get more info on this page.

Installing elbow in ductwork.
I have a Chapter #44 in my Ductwork Installation Guide book dedicated to this subject.

44. "Jumper" Installation – the chapter gives a description how to make 45 degree angle from the “elbow”. Chapter covers all possible cases of measurement, calculation and installation of the “jumpers”. Also the chapter covers several uncommon cases of the “jumper” installation. The chapter has 61 pictures; 29 pages*. $2.50 (Instant Access). On 09/22/2013 text of this chapter was significantly modified and improved.

Is it ok to tap into a return air duct?
Yes.

Kitchen fan duct solutions.
They are on this page.

Make your own register boot for duct.
Yes, you can do it! Purchase Chapter #18 from my Ductwork Installation Guide first, and if you'll find out that your lay out is different I'll give you advise for free.

My basement is cold because of my furnace venting.
You should add a combustion air intake. Get more info and pics on this page.

My furnace makes a sound like moving furniture.
Well, maybe it does...

My metal ductwork is damaged what can be done?
If your ductwork is damaged, take some pictures and send them to me on this page.

Name the parts for furnace ductworks.
In the different parts of the country the same parts are named differently. Learn parts names in the Chapter Materials of my "Ductwork Installation Guide" book.

Nothing works on your heating & air conditioning system.
This statement is wrong!

Pop sound coming from ducts in ceiling - will duct cleaning help?
It may help if there are some plastic bottles in the ducts.

Questions to ask before installing furnace humidifier?
Well, do not ask questions install it yourself.

Should I use insulation to stop a furnace duct leak?
No, you should use duct sealing mastics. Buy it on the right.

Should OSHA be called in if there is insulation coming out of heating and air vent at work?
Maybe, but I would call the installer company first.

Should the condensate pump on my furnace have water in it?
Yes.

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.
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If I do not have an answer to your specific question, I will refund your money as well.

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