List of Simple Questions 7

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! 

130 degree how hot should gas furnace ductwork get?
Check out the sticker inside of your furnace, in the most cases the temperature cannot exceed 170*F.

Air duct vent relocation solutions.
I have Chapter #1 in my Energy Saving Edition book for you to read.

Any danger in closing up heat duct vent in wall?
If you have only so many vents for your furnace you may overheat it. Get more info on this page.

Are cold air returns necessary on direct vent furnaces?
They are necessary on any type of furnaces.

Are there books on how to insulate metal ductwork in a home?
No, but I have a paid page on my site dedicated to this issue.

Are you supposed to turn off gas in summertime furnace?
If you have an old furnace with a pilot on all the time you must turn it off, otherwise it's up to you.

Can an old sweating metal ac duct be repaired?
It would be better to replace it.

Can bathroom fans duct into waste vents in attic?
No. But you can vent it through the roof cap or through the soffit cap. Just buy one of them on this page.

Can dryer exhaust be greater than 4"?
No, because it will reduce speed of airflow.

Can gas vent run through space with cold air return?
No.

Can I use flexible gas connection for my furnace?
Yes, you can, but first call to your city building department. If they okay it buy it on this page on the right or on the left.

Can I use make up air from your attic in my restaurant?
No, and do not even ask why!

Can I use my existing flue when changing furnace?
Yes, only if this is the same type of furnace.

Can return air be on basement ceiling?
Yes, it can, but better keep it low.

Can you burry an air duct?
Well, if it is dead, why not!

Can you connect a clothes dryer vent with a New Yorker residential heating boiler?
No.

Can you install a humidifier on the supply duct?
You are probably asking about the plenum. Yes, you can, but it would be better put it on the cold air drop.

Can you put a down flow furnace in a basement?
If you are having underground ductwork, then yes.

Can you run an over the counter microwave/exhaust fan into the attic?
No, it should be run to the outside.

Can you run ductwork downward when installing a microwave?
Yes.

Can you use flex duct for over range vent?
Yes, if it's a rigid one.

Closing fireplace fresh air vent.
Personally, I do not use fireplace in my house at all, so I have blocked both: exhaust and intake.

Cold air return takes up to much space as our basement has low ceilings, can I reduce the size of it?
Speaking in general terms - yes you can.

Do I need a heating vent in basement bathroom?
If there no window you may avoid it, but I would put it in there anyway as a bath fan exhaust make up air.

Do I need to cover furnace exhaust vent with a screen?
Yes, you might do it.

Do microwaves require a 4 or 6-inch duct?
6".

Do you have pictures of mini split systems installed?
Yes I do, just go to this page.

Do you know if you can exhaust a high efficient furnace through an existing sheet metal flue?
I was told you could run PVC from the furnace and couple it to the old stack. No! This person doesn't know anything about furnace venting. Check your installation instructions for venting requirements.

Do you need to crimp rectangular duct?
No.

Does a microwave hood need ductwork?
Yes.

Does combustion intake need fresh air?
Yes, directly or indirectly it should have fresh air.

Does the cold air return need to be on the floor?
No. It should be on the wall.

Dry eyes due to low humidity in the house.
I have a page on my site dedicated to this issue. And you can install a whole house humidifier - buy one of them on this page on the right or on the left.

Heating vent make clicking noises, can't sleep.
Well, if you can't sleep, why you didn't purchase my Ticking Noise Elimination page?

How can I tell the difference between the A/C return and supply lines?
If air blows out - it is a supply, but if it sucks in it is a return.

How do I install cold air return registers?
Learn how to do it in Chapter #52 of my Ductwork Installation Guide book.

How do I install ductwork in attic area over the garage?
Part of Chapter #62 in my Ductwork Installation Guide book is dedicated to this issue.

How do I insulate range hood ductwork running through unconditioned attic space?
You can insulate it with the wrap or sleeve insulation.

How do I know if my heat pump system is too small?
If it doesn't keep up with the load - working constantly and will never satisfy the thermostat, then it's one of the reasons your system is too small.

How do I reconnect the ductwork if a new furnace is smaller?
Find the answer on this page.

How do I rough in ceiling return air grill?
Learn how to do it in Chapter #56 of my Ductwork Installation Guide book.

How do you put a 4 in. galvanized duct together?
I have a paid page for this matter.

How far away does flex duct need to be from a furnace?
It can even touch it, zero clearance.

How joist panning connecting to square duct?
It's easy, you can find an answer to this question in Chapter #34 of my Ductwork Installation Guide book.

How many elbows can you put in a supply duct?
You can put as many as necessary, but learn about the best practices of doing that in Chapter #44 of my "Ductwork Installation Guide" book.

How much air intake is needed in new gas furnace installation?
If your question is about the cold air returns then you need as much as you can get.

How to change a forced air heat register from floor to ceiling?
Before you do, decide why you want to do it in the first place!

How to connect 3.25x10 ducts?
You have to connect it with S-cleats and Drive-cleats.

How to connect a cold air return to filter on outside of furnace?
You can find a step-by-step tutorial for this installation in Chapter #40 of my Ductwork Installation Guide book.

How to connect flex duct to existing metal ductwork?
I have Chapter #56 in my Ductwork Installation Guide book dedicated to this issue.

How to cut insulation for round air duct elbow?
Roll it over a piece of insulation, add 6" and cut a piece to length. Wrap an elbow and secure it with a piece of foil tape. Cut extra insulation off with the utility knife along the elbow's edges.

How to get the right amount of air in cold return?
Do not worry about that; just make as many cold air returns as you can!

How to install a cold air return filter box on my furnace?
Find the answer to this question in Chapter #56 of my Ductwork Installation Guide book.

How to install central air in a house with no ductwork videos?
There are no good quality videos on a market anyway, so the best chance for you is to purchase my Ductwork Installation Guide book. If you disagree with these words, please contact me on this page.

How to install dampers in ductwork?
If your question is about a pipe then, pierce a hole with a scratch awl, make this hole larger, poke the bolt through the hole with the washer on, put a handle on and tighten the wing nut.

Do you need to crimp rectangular duct?
No.

Does a microwave hood need ductwork?
Yes.

Does combustion intake need fresh air?
Yes, directly or indirectly it should have fresh air.

Does the cold air return need to be on the floor?
No. It should be on the wall.

Dry eyes due to low humidity in the house.
I have a page on my site dedicated to this issue. And you can install a whole house humidifier - buy one of them on this page on the right or on the left.

Heating vent make clicking noises, can't sleep.
Well, if you can't sleep, why you didn't purchase my Ticking Noise Elimination page?

How can I tell the difference between the A/C return and supply lines?
If air blows out - it is a supply, but if it sucks in it is a return.

How do I install cold air return registers?
Learn how to do it in Chapter #52 of my Ductwork Installation Guide book.

How do I install ductwork in attic area over the garage?
Part of Chapter #62 in my Ductwork Installation Guide book is dedicated to this issue.

How do I insulate range hood ductwork running through unconditioned attic space?
You can insulate it with the wrap or sleeve insulation.

How do I know if my heat pump system is too small?
If it doesn't keep up with the load - working constantly and will never satisfy the thermostat, then it's one of the reasons your system is too small.

How do I reconnect the ductwork if a new furnace is smaller?
Find the answer on this page.

How do I rough in ceiling return air grill?
Learn how to do it in Chapter #56 of my Ductwork Installation Guide book.

How do you put a 4 in. galvanized duct together?
I have a paid page for this matter.

How far away does flex duct need to be from a furnace?
It can even touch it, zero clearance.

How joist panning connecting to square duct?
It's easy, you can find an answer to this question in Chapter #34 of my Ductwork Installation Guide book.

How many elbows can you put in a supply duct?
You can put as many as necessary, but learn about the best practices of doing that in Chapter #44 of my "Ductwork Installation Guide" book.

How much air intake is needed in new gas furnace installation?
If your question is about the cold air returns then you need as much as you can get.

How to change a forced air heat register from floor to ceiling?
Before you do, decide why you want to do it in the first place!

How to connect 3.25x10 ducts?
You have to connect it with S-cleats and Drive-cleats.

How to connect a cold air return to filter on outside of furnace?
You can find a step-by-step tutorial for this installation in Chapter #40 of my Ductwork Installation Guide book.

How to connect flex duct to existing metal ductwork?
I have Chapter #56 in my Ductwork Installation Guide book dedicated to this issue.

How to cut insulation for round air duct elbow?
Roll it over a piece of insulation, add 6" and cut a piece to length. Wrap an elbow and secure it with a piece of foil tape. Cut extra insulation off with the utility knife along the elbow's edges.

How to get the right amount of air in cold return?
Do not worry about that; just make as many cold air returns as you can!

How to install a cold air return filter box on my furnace?
Find the answer to this question in Chapter #56 of my Ductwork Installation Guide book.

How to install central air in a house with no ductwork videos?
There are no good quality videos on a market anyway, so the best chance for you is to purchase my Ductwork Installation Guide book. If you disagree with these words, please contact me on this page.

How to install dampers in ductwork?
If your question is about a pipe then, pierce a hole with a scratch awl, make this hole larger, poke the bolt through the hole with the washer on, put a handle on and tighten the wing nut.

How to install ductwork takeoffs?
You can find a step-by-step tutorial for this installation in Chapter #41 of my Ductwork Installation Guide book.

How to know undersized ducting?
Undersized return air duct(s) which can impede efficiency and overwork your compressor. Improperly sized ductwork is resulting in inadequate or noisy airflow.

How to measure oval ducting?
The same way as a round one.

How to plumb a furnace condensate line?
You can use a torpedo level. Do not have one? Buy it on this page on the right or on the left.

How to replace old rusty cold air return ducts?
The same way you would install a new one. For more info, please purchase Chapter #40 of my Ductwork Installation Guide book.

How to seal a hole in ductwork with an end cap?
You have to make S-sides and drive-sides on the duct to match them on the end cap and use S-cleats and drive-clits for connection. Apply some silicone or duct sealant.

How to take a ductwork apart?
If you are asking about round ducts (pipes) you can take a quiz and find out for yourself how it works. However, if your question is about rectangular duct you should do the following:
Screw duct's wide side to any wood (floor, stud) and pull another part of this duct out.

How to vent furnace PVC through vinyl siding wall?
It's easy, you can find an answer to this question in Chapter #49 of my Ductwork Installation Guide book.

I would like to see finished basement with metal studs photos.
You can see it in Chapter #54 of my Ductwork Installation Guide book.

If you move a cold air return, do you have to patch the ductwork?
Absolutely!

Is a cold air return needed if a furnace draws fresh air from outside?
If you are not asking about a commercial kitchen makeup air unit, any furnace needs a cold air return.

Is it better to have a hood or a microwave with top vent?
A microwave hood serves both ways, while a kitchen hood only one.

Is it common to bring in outside air to your furnace or just let furnace recycle air in the home?
Yes, they named it a fresh air intake.

Is it safe to close vents in crawlspace in winter if a gas furnace is down there?
If your crawl space is insulated and sealed then you can do it.

Joining 9x12 ducts between I-Joists.
This isn't very difficult to do. Learn how to do it in Chapter #41 of my Ductwork Installation Guide book.

Pictures of connecting bathroom fan duct "in the wall".
You can see them on the Top of the Line House Ductwork Installation page.

Sealing floor register from basement air.
You can use foam spray for this matter.

Should a bedroom over a garage have a cold air return?
Any bedroom should have a cold air return.

Should be a central air return placement low or high on wall?
Learn more for this issue on this page.

Should hvac ductwork be off the floor in an unfinished basement?
It must be 1" off the joists for a supply and tight to the joists for the return.

Should I close heat vents in my basement?
If you are not using them then yes.

Should I insulate ductwork in crawl space?
According to recent changes in code, you should do it.

Should the condensate pump on my furnace have water in it?
Absolutely, it is what the condensate pump is designed for.

The air return vent is in an upper corner of the living room wall, at the ceiling. The grille is metal and has angled slats. Should the slats be angled up toward the ceiling? Or down toward the room? Or doesn't it really matter?
It doesn't matter except for aesthetics. If you don't want to see inside the grille, point them up.

Tools for installation of ducts.
You can find a list of all tools for ductwork installation in Chapter #1 of my Ductwork Installation Guide book. Also you can buy most of it on this page.

What are Colorado heater fresh air intake code requirements?
I believe they are the same for the rest of the country.

How to install ductwork takeoffs?
You can find a step-by-step tutorial for this installation in Chapter #41 of my Ductwork Installation Guide book.

How to know undersized ducting?
Undersized return air duct(s) which can impede efficiency and overwork your compressor. Improperly sized ductwork is resulting in inadequate or noisy airflow.

How to measure oval ducting?
The same way as a round one.

How to plumb a furnace condensate line?
You can use a torpedo level. Do not have one? Buy it on this page on the right or on the left.

How to replace old rusty cold air return ducts?
The same way you would install a new one. For more info, please purchase Chapter #40 of my Ductwork Installation Guide book.

How to seal a hole in ductwork with an end cap?
You have to make S-sides and drive-sides on the duct to match them on the end cap and use S-cleats and drive-clits for connection. Apply some silicone or duct sealant.

How to take a ductwork apart?
If you are asking about round ducts (pipes) you can take a quiz and find out for yourself how it works. However, if your question is about rectangular duct you should do the following:
Screw duct's wide side to any wood (floor, stud) and pull another part of this duct out.

How to vent furnace PVC through vinyl siding wall?
It's easy, you can find an answer to this question in Chapter #49 of my Ductwork Installation Guide book.

I would like to see finished basement with metal studs photos.
You can see it in Chapter #54 of my Ductwork Installation Guide book.

If you move a cold air return, do you have to patch the ductwork?
Absolutely!

Is a cold air return needed if a furnace draws fresh air from outside?
If you are not asking about a commercial kitchen makeup air unit, any furnace needs a cold air return.

Is it better to have a hood or a microwave with top vent?
A microwave hood serves both ways, while a kitchen hood only one.

Is it common to bring in outside air to your furnace or just let furnace recycle air in the home?
Yes, they named it a fresh air intake.

Is it safe to close vents in crawlspace in winter if a gas furnace is down there?
If your crawl space is insulated and sealed then you can do it.

Joining 9x12 ducts between I-Joists.
This isn't very difficult to do. Learn how to do it in Chapter #41 of my Ductwork Installation Guide book.

Pictures of connecting bathroom fan duct "in the wall".
You can see them on the Top of the Line House Ductwork Installation page.

Sealing floor register from basement air.
You can use foam spray for this matter.

Should a bedroom over a garage have a cold air return?
Any bedroom should have a cold air return.

Should be a central air return placement low or high on wall?
Learn more for this issue on this page.

Should hvac ductwork be off the floor in an unfinished basement?
It must be 1" off the joists for a supply and tight to the joists for the return.

Should I close heat vents in my basement?
If you are not using them then yes.

Should I insulate ductwork in crawl space?
According to recent changes in code, you should do it.

Should the condensate pump on my furnace have water in it?
Absolutely, it is what the condensate pump is designed for.

The air return vent is in an upper corner of the living room wall, at the ceiling. The grille is metal and has angled slats. Should the slats be angled up toward the ceiling? Or down toward the room? Or doesn't it really matter?
It doesn't matter except for aesthetics. If you don't want to see inside the grille, point them up.

Tools for installation of ducts.
You can find a list of all tools for ductwork installation in Chapter #1 of my Ductwork Installation Guide book. Also you can buy most of it on this page.

What are Colorado heater fresh air intake code requirements?
I believe they are the same for the rest of the country.

What does it mean when you have water trapped between a/c duct and insulation?
That means that there are gaps in your insulation.

What is code for condensate pump in an attic?
Personally, I never heard about a condensate pump in an attic installation, you should use gravity instead.

What is the difference between a return chase and supply ducts?
The main difference is in the materials. For the supply ducts you have to use sheet metal, but for the return wood and drywall it could be used.

What is the industry standard way to measure CO in residential gas furnaces?
You should measure at the furnace with a combustion analyzer.

What is the maximum flex ductwork length?
25'.

What is the maximum safe limit of CO?
Average levels in homes without gas stoves vary from 0.5 to 5 parts per million (ppm). Levels near properly adjusted gas stoves are often 5 to 15 ppm and those near poorly adjusted stoves may be 30 ppm or higher.

What is the soft material that is between around my furnace plenum?
It is probably foam insulation.

What to do if you cut the cold air return on the wrong side of the furnace?
Try to turn furnace at 180*, if it does not work patch it or you can connect this furnace to the cold air drop on both sides. Learn how to do it in Chapter #55 of my Ductwork Installation Guide book.

What works best insulated flex duct or galvanized duct for air return?
Galvanized duct is always better.

Where do you install a humidifier to my ductwork?
The best place is on the cold air drop.

Where I can find do-it-yourself ductwork installation book?
Surprise, surprise - you can find it on this website.

Where I can see images of offset ducting?
On this page.

Where should inducer condensation drain run out?
It should be dumped to the floor drain or to the condensate pump.

Where should return be supply outlets in ceiling?
Next to the windows.

Which side of the furnace is for cold air return?
At that side where the blower sits.

Which tape should I use to seal off furnace registers?
You should not use tape for this matter.

Why did my hvac installer install a return air vent that pulls in outside air?
It is probably a fresh air intake.

Why does my bath fan blow air back into the bathroom?
Something is blocking the exhaust.

Why electronic furnace air filters makes constant ticking sound?
Because of its moronic design! Disconnect the power and replace all it guts with a 4" - 5" pleated filter.

Why my air return filters popping after air shuts off?
Many air units have filters located in the grill, usually without a filter at the handler. It will decrease intake flow but, here again, many handlers can be set to operate at faster and slower speeds. The problem you may run into is if there is too much 'drag' on the intake, is 'oil-canning' at the air handler.
There is a popping noise that happens when the air handler shuts off. The noise is caused by excessive negative pressure in the air handler, which could result from too much drag caused by multiple filters and/or the handler speed is too high or ducts too small, or even clogged filters.

Why my ductwork makes a clicking sound when I turn on the heat?
It's because so far you have not visited this page on my site!

Why my high efficiency gas furnace vent "blowing water"?
Your furnace has a P-trap inside, maybe it’s clogged, or if your condensate line is glued directly to the P-trap then it can be clogged.  

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.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |

What does it mean when you have water trapped between a/c duct and insulation?
That means that there are gaps in your insulation.

What is code for condensate pump in an attic?
Personally, I never heard about a condensate pump in an attic installation, you should use gravity instead.

What is the difference between a return chase and supply ducts?
The main difference is in the materials. For the supply ducts you have to use sheet metal, but for the return wood and drywall it could be used.

What is the industry standard way to measure CO in residential gas furnaces?
You should measure at the furnace with a combustion analyzer.

What is the maximum flex ductwork length?
25'.

What is the maximum safe limit of CO?
Average levels in homes without gas stoves vary from 0.5 to 5 parts per million (ppm). Levels near properly adjusted gas stoves are often 5 to 15 ppm and those near poorly adjusted stoves may be 30 ppm or higher.

What is the soft material that is between around my furnace plenum?
It is probably foam insulation.

What to do if you cut the cold air return on the wrong side of the furnace?
Try to turn furnace at 180*, if it does not work patch it or you can connect this furnace to the cold air drop on both sides. Learn how to do it in Chapter #55 of my Ductwork Installation Guide book.

What works best insulated flex duct or galvanized duct for air return?
Galvanized duct is always better.

Where do you install a humidifier to my ductwork?
The best place is on the cold air drop.

Where I can find do-it-yourself ductwork installation book?
Surprise, surprise - you can find it on this website.

Where I can see images of offset ducting?
On this page.

Where should inducer condensation drain run out?
It should be dumped to the floor drain or to the condensate pump.

Where should return be supply outlets in ceiling?
Next to the windows.

Which side of the furnace is for cold air return?
At that side where the blower sits.

Which tape should I use to seal off furnace registers?
You should not use tape for this matter.

Why did my hvac installer install a return air vent that pulls in outside air?
It is probably a fresh air intake.

Why does my bath fan blow air back into the bathroom?
Something is blocking the exhaust.

Why electronic furnace air filters makes constant ticking sound?
Because of its moronic design! Disconnect the power and replace all it guts with a 4" - 5" pleated filter.

Why my air return filters popping after air shuts off?
Many air units have filters located in the grill, usually without a filter at the handler. It will decrease intake flow but, here again, many handlers can be set to operate at faster and slower speeds. The problem you may run into is if there is too much 'drag' on the intake, is 'oil-canning' at the air handler.
There is a popping noise that happens when the air handler shuts off. The noise is caused by excessive negative pressure in the air handler, which could result from too much drag caused by multiple filters and/or the handler speed is too high or ducts too small, or even clogged filters.

Why my ductwork makes a clicking sound when I turn on the heat?
It's because so far you have not visited this page on my site!

Why my high efficiency gas furnace vent "blowing water"?
Your furnace has a P-trap inside, maybe it’s clogged, or if your condensate line is glued directly to the P-trap then it can be clogged.  

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.

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |