List of Simple Questions 8

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! 

Added ductwork to basement and now have lower airflows around the house.
As soon it keeps up with the load, it is fine. 

Are range hoods suppose to bang and make noise?
No.

Attic air handler installed with secondary drain lower than primary!
This is just a minor mistake. Call the installer back out and let him fix that.

Best type of duct for crawl space with rodents?
Sheet metal ducts.

Books on installing ductwork in a crawl space.
Well, there's only one book available for this matter: Ductwork Installation Guide e-book.

Can a furnace blower fan be too powerful?
Well, it could be if your furnace is oversized, or ductwork is undersized.

Can a furnace, air handler be installed upside down?
No.

Can I have a 90 degree bend in my ac return duct?
If you are asking about flex, it can be 90* bend, but try to make a big radius.

Can I have bathroom fan vent into floor drain?
No.

Can I insulate my ductwork twice?
Yes.

Can I put return ducts in ceiling with a down flow furnace?
I guess that you should do it.

Can I use one condensate pumps for two furnaces?
Yes.

Can insulation touch ductwork?
If it isn’t a R-foil it must touch ductwork.

Can thermostats be adjusted to half a degree?
No.

Can you attach bathroom fan ductwork to existing roof vents?
Yes, you can. More info in Chapter #25 of my Ductwork Installation Guide book. And you may need to buy some 4" insulated flex to get the job done. Buy it on the right.

Can you close off your fresh air vent to the furnace?
Yes you can, but better leave it alone or get more info on the paid page.

Can you cover your heat pump duct vents to save energy?
Yes, you can. Learn how to do it the right way on this page.

Can you explain exactly how the Bryant Evolution system works? What does it monitor?
Does it self adjust run times? What does it communicate?
Stat measures indoor temperature and humidity, Outdoor unit measures outside temperature. With a humidifier hooked up it will take into account the outside temperature so you do not get condensation. I.e. it will never hit 50% when it is cold outside.
The stat has some other settings like comfort or economy and will change blower speed based on that.
In the summer, it will adjust blower speed and/or stage based on indoor humidity/temp.

Can you install a fresh air intake without a furnace?
Yes, they name it a combustion air intake.

Can you install heat pump supply grills in the floor?
It is what smart people would do.

Can you run a cold air return thru the wall with no ductwork?
Yes.

Concentric vent tapping noise.
I have a paid page with a solution to this issue.

Could you put a PVC exhaust line for gas furnace over an electrical wire?
Yes.

Do furnaces make noise?
Yes.

Do I need a condensate trap for my furnace?
No, it is already there.

Do I need to redo my ducts for zoned heating?
Yes. You have to add a trunk line or two.

Do retirement homes need fresh air intake?
Believe me, they need a fresh air intake even more than others!

Do you glue PVC vent to high efficiency furnace?
No.

Do you need to install new vents when you install a new furnace?
No.

Does a condensation furnace need the condensation pump to work?
If you have a floor drain or sump well nearby then answer is no.

Does energy saving garage door windows save a lot?
Well, not really. For more info please visit this page.

Does high efficiency furnace need a dedicated circuit?
Yes.

Does increasing duct size help airflow?
Yes.

Does it matter where take offs are installed on supply air ducts?
Not really, but better to install them on the top and the last one 12" off the end cap. And, by the way, you can buy them on this page on the right.

Does rough-in hvac include insulate duct lines?
No, if they are in the exterior walls there should be wall insulation behind them.

Does steel gas piping expand and contract and make popping sounds?
Normally not.

Does the code allow range hood vent between floor joists?
Yes.

Drum style furnace humidifier.
You can get all info you need on this page. And you can buy this kind of humidifier on the right or on the left.

Dry eyes from gas furnace.
You may consider installation of a humidifier.

Duct installation guide you tube.
Do not even think about it! It may take hundreds and hundreds of video clips to cover all possible cases of ductwork installation and so far, nobody did it for free!

Free furnace installation pictures step-by-step.
I have these kinds of pictures on this site! Price is only $2.50! As you can see it's extremely low and you can consider it is free.

Funny sound in wall when furnace runs!
Nothing is funny when you are suffering from the ticking noise!

Furnace rattles but stops when you step on certain areas of floor.
Right, it happens! Why not to fix it! Find a solution on this page.

High efficiency furnace exhaust installation can it go through crawl space?
Yes, if there is enough pitch.

How balance and adjust forced hot-air registers to minimize wind noise?
You may need to adjust the dampers.

How do you attach sheet metal to joists for cold air return?
Usually I use the sheeting nails.

How do you unsnap single wall stove pipe?
I have a quiz dedicated to this issue.

How far apart should the flue be from the combustion air pipe?
If this question is about PVC pipe, then min 2", otherwise 10'.

How far away should a thermostat be from a return duct?
From 3' - 4' to any appropriate place in a house.

How far from the wall, do you install heat registers?
4" off the finished wall.

How far off from floor should be fresh air intake?
Fresh air intake should be connected to the cold air duct. Combustion air intake should be terminated 12" off the floor.

How far off the wall should ductwork be for microwave vent?
There are no restrictions for this installation.

How far to put insulated ductwork from gas line?
There are no restrictions for this installation.

How many cold air returns can you put together?
Four on a wall. From two to eight in a joist space.

How many heat registers should you have in a living room?
It depends on the room's size and the pipes sizes. Do a load calculation, or just put one heat under each window.

How many volts should I have at thermostat wires?
24v.

How tall should a furnace plenum be?
It should be 1" off the joists.

How to add humidity to a room using air handler?
You have to install a humidifier. Buy a whole house humidifier on this page.

How to attach ductwork to floor?
With the sheeting nails.

How to cut a hole in the ductwork to get a cat out?
Drill a hole with a unibit, cut an opening with the red aviation snips, let a cat out, and patch a hole. If there are no cat at this location repeat it as many times as necessary.

How to cut a sheet metal hvac duct?
The answer is on this page.

How to cut off existing dryer 4 inch round duct?
You can use a saw-zall with a metal blade. Buy both on the right or on the left.

How to drop a heat register in soffit right below ductwork?
I have two pages on my site dedicated to this issue.

How to fasten ductwork on concrete ceiling?
You can use "silver bullets" anchors. And you can buy them on this page on the right.

How to fix ductwork that booms?
Learn how to do that on this page.

How to replace old flex duct on YouTube?
Yes, there is such video. (HVAC Install video player, 16-th video).

How to trace an obstruction in furnace ductwork?
You may hire the duct cleaning company to do it. They have special video cameras for it.

How to wire a condensate pump on a high efficiency furnace?
On some models, I saw a couple of control wires, but I never hooked them up. Just plug it in the outlet and that's it.

I get sick when the furnace runs.
Well, maybe you have cracked heat exchanger!

I was kneeling on power lines and touched metal ductwork.
Wow! And you are still alive?

If I put insulation around my heat ducts will the noise stop?
I do not think so, but anyway its a very expensive solution for such minor problem! Find a solution on this page.

If you set anything on a vent in the house, can it cause the furnace to explode?
If it's a centralized cold air return it may overheat a heat exchanger, but explode... I do not think so.

Installation 8-inch heating duct.
Learn how to do that in the Chapter #45 of my Ductwork Installation Guide e-book.

45. Application 8" Pipes and Fittings* – the chapter describes how to use 8” pipes and fittings, explains how to make field made Tee, and covers penetration of a pipe through blocker. The chapter has 15 pictures; 11 pages*. $2.00 (instant Access). *Broken Elbow Quiz. On 07/15/2013 text of this chapter was significantly modified and improved. Five more pictures were added.

Installing a basement exhaust fan with photos.
There are a lot of photos on this page.

Is a 12" return hose adequate for a 3 ton heat pump?
No, should be at least 16". Buy 16"- 18"- 20" insulated flex on the right or on the left.

Is furnace humidifier supposed to be on when air conditioner is on?
No.

Is it normal for a carrier whole house performance bypass humidifier to drain a lot of water?
No, you should reduce water flow thru the humidifier and/or install a second one. Learn how to do that on this page.

Is it ok to block a cold air return with a couch?
If your couch is with legs, then it's fine.

Is it ok to have temperature rise a few degrees over recommended setting on a gas furnace?
No, it could damage a heat exchanger.

Is it unsafe to have a furnace installed on it's side in a crawl space?
No, but how else could it be installed?

Is there a wrong way to strap up flex ductwork in the crawl space?
Straps should be 1 ½" wide and 4' -5' apart.

My furnace is in the bathroom, should I shut the door?
In order to do this you have to have a louvered door or combustion air intake.

My furnace sets on the floor of our attic. Would it be more efficient in the ceiling of our basement?
Why would you want to put it in the ceiling? Set it on the floor.

Office building noisy A/C supply registers. How to resolve it?
First off try to close a damper. Secondly, put another register off the same duct.

Pictures and guidebooks on how to finish your basement yourself.
You can find a lot of pictures in the Finished Basement Edition book.

Should a furnace closet be closed?
Yes, if you have a combustion air penetrations.

Should heat registers in an unfinished basement be left open?
You can close them off if you do not use this basement as a living space at all.

Should I cut into the basement ducting to add vent?
Yes.

Show me a picture of the duct crimping tools.
You can use a special tool - crimpier, or you can use a long nose pliers, buy them on the right or on the left.

Taking heating run off plenum.
Learn how to do that in Chapter #38 of my Ductwork Installation Guide book.

Tips on fabricating metal at home to make my own pipe sections to replace exhaust vent connections.
Yes, of course, I know these kinds of tips, but for exhaust vent, you would be better of buying the genuine stuff.

We would like to install a range hood that vents to the outside. The oven is on an interior wall. We have a two story home. Is this a possibility? What would you suggest?
Usually it's part of a bigger demo. A bulk head or soffit above the cabinets is one way to rout to the outside wall. Another option is a downdraft type. The system has a vent at counter level and uses a pretty powerful fan to suck the fumes down and out. The vent is routed through the basement or the base cabinets to an outside wall.

Were to find a book for ductwork installation new construction?
Here, on this site.

What can I replace my old metal duct work with?
With the new metal ductwork. And you can buy it all on the right.

What can if line my ducts with noise reduction?
You can use an acoustic duct liner.

What can one put over a hot air heating register to filter the air coming out?
Nothing, put a filter at the furnace.

What can you do to keep heat loss from your metal ductwork on your furnace?
Insulate it.

What class duct tape do you need for dryer exhaust?
You must use rated aluminum foil tape. Buy it on the right or on the left.

What happens when you put heat on with a new wood floor for the first time?
It could be a problem if you do not have a humidifier. But you can buy one on this page.

What is a difference between a chase and duct?
Chase is the duct's enclosure.

What is black insulation in sheet metal of cold air return?
They name it acoustic duct liner.

What is flexible transition for a furnace to quiet the noises from the ducts?
They named it a canvas.

What is the best ceiling/wall registers close off?
Find it out on this page.

What is the best tape to seal your ductwork?
Aluminum foil tape. And you can buy it on this page on the right or on the left.

What r-value on air-conditioning duct trunk in attic?
Normally R-6, R-8.

What to put under a furnace in the basement?
You can put rubber pads, bricks, S-cleats. And you can buy rubber - cork pads on the right.

Where to find practical formula for offset calculation?
Here, on this page.

Why condensate pump overflowing when furnace is heating?
There is probably kink or blockage in the plastic tubing, which is coming off the pump.

Why did my hvac guy install pvc pipe exiting the crawl space?
It might be a condensate line.

Why do I hear popping noise from the copper tube on my gas central heating unit?
Because they are expanding and contracting. Find a solution on this page.

Why do they sell 4 in duct if no 4 in register box?
Because 4" pipes in use for the other needs.

Why does the back of my fireplace have duct work?
Probably because it was only free spot to run them there…

Why is there a dripping sound in wall, why do my heating vents ping?
Get an answer on this page.

Will a dirty filter cause my ductwork to sweat?
Yes.

Will all down flow gas furnace work lying on the side?
Yes.

Will bad furnace inducer prevent furnace from working?
Yes.

Will lowering the hvac fan speed cause ductwork to sweat?
Yes.

Would a cold air return prevent high humidity?
It might.

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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