List of Simple Questions 4
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 an 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!
2 bath fans vented through existing roof vent.
Learn how to do it in Chapter #25 (below) of my DIGuide book.
Air not reaching back room.
Learn how to fix it on this page (below).
Are these comparable furnaces?
I’m the homeowner of a 2,000 house in the twin cities area. House built in the 70s. Insulation levels are not great but going to make things much better. There’s currently an 80% efficient single stage natural gas furnace that vents through the chimney.
Got several estimates to replace hvac and I think I’ve narrowed it down to 2.
First is a Bryant987MA 60k btu variable speed.
Second is an AmanaAMVC96 60k btu variable speed.
The Bryant contractor says Amana is an inferior Goodman product.
The Amana contactor emphasizes the stainless steel parts and warranty and doesn’t really bad mouth any brand.
I know NOTHING about this. What’s most important to me is energy efficiency and reliability. If I have a problem I want to be able to get it FIXED. I know installation is just as important as the product itself.
Price is substantially different. Bryant is about $4500 more. I’ve asked and reviewed the quotes and they’re doing pretty much the same thing.
The Bryant person is unprofessional IMO, just for the fact of belittling the competition instead of highlighting the pluses of the Bryant line...
Bath fan vented through the soffit.
The Amana is a higher tiered level than the Goodman, as an example only, the manufacturer warranty typically is better, especially the higher the SEER you go. Also the Goodman furnaces have the aluminized steel Heat Exchanger. Nothing wrong with that type of HX, as Goodman gives a limited lifetime warranty along with other manufacturers.
The Amana was referencing the Heat Exchanger (HX) is stainless steel, whereas many are aluminized coating steel. I do not know what the Bryant model number has.
Both probably have a limited lifetime HX warranty to original owner but the difference between the two is with the Amana, you get a complete new furnace if HX ever fails, don't believe the Bryant offers that type of warranty.
Bryant looks to have a modulating gas valve, variable speed blower fan, the Amana looks to be two stage , variable speed, communicating
Both should apply for any rebates your state or local gas utility company mayboffer. Would need a AHRI number.
One source for potential rebates: http://www.dsireusa.org/
Make sure whatever brand model you choose make sure to register the furnace, as those great warranties of both companies can be decreased.
You want reliability? Have the Installing Contractor follow the install guide to the letter, making sure your existing ductwork is sized correctly for your furnace. Make sure your furnace is sized correctly for your residence.
Learn how to do it in Chapter #23 (below) of my DIGuide book.
Black insulation not covering air condition hose.
Can a builder be sued over ductwork condensation?
Name of this black insulation is armaflex; you can buy it at any HVAC supply house.
In America? No questions asked!
Can air conditioner vents under cabinets cause your hardwood floors to buckle?
If these vents aren't extended to the openings in the cabinet's bases then I think they can.
Can anything be done to remedy lack of cold air return?
Just install an additional cold air return; read more and step-by-step tutorial on this page (below).
Can I have a return vent in my basement to my furnace?
Can I install a duct booster fan in my heat pump?
Absolutely! And you can buy it on this page, on the right.
Can I install booster fans inside my furnace air ducts?
Yes, you can!
Can I install my air conditioning ducts in the attic?
Yes, you can, but find a better solution.
Can I replace a furnace door switch myself?
Yes you can. Just buy one on the right.
Can you cover fresh air vent for noise reduction in house?
There are no direct correlation between fresh air intake and noise in house. However if you don't have enough cold air returns fresh air intake may help a little.
Can you seal off a return heating register?
You can seal off whatever you like even cold air supply grill...
Can you vent a gas furnace with a draft inducer blower through a wall in the crawlspace?
Technically, you can, but it would be against a manufacturer's instruction and code. However, they allow you to run an exhaust from a garage heater or from all kinds of suspended heaters in the commercial applications...
China heat pump price.
Learn about heat pump prices on this page.
Condensing unit is making a buzzing sound even when off.
Even if it's off you have low voltage wires to the unit and a relay that is always energized by them.
Do and don’ts of furnace ducting installation.
I have entire book (below) dedicated to this issue.
Do Honeywell humidifiers waste water?
Yes, learn how to reduce water consumption on this page (below).
Do I need fresh air for wood stove?
If you are asking about combustion air then the answer is yes.
Do the modern clothes dryers leave clothes damp?
It seems to me that your exhaust pipe is clogged with the lint, find a solution on this page.
Do you insulate round ductwork?
Do you put cold air returns in a kitchen?
No cold air returns in kitchens and bathrooms allowed by code.
Does a furnace plenum need to be insulated?
In a conditioned space you can skip on it.
Does air return run down your wall or up?
In the most cases it depends on location of your furnace/air handler.
Does furnace fresh air intake lower heating cost?
Maybe just a bit, but learn how to make it work for you on this page (below).
For each season which hvac return register do you open and close?
This question only seems simple, please read on this page (below).
How do I hook ductwork to existing ductwork?
It is not really a simple question; get more info on this page (below).
Does every heat vent need a cold air return?
Well, in the perfectly designed system, it does, but nothing is perfect.
How far apart do you place air conditioning diffusers?
Normally – according to the blueprint. But they should cover entire room.
How far should be cold air return from furnace?
If this is basement cold air return - the 10'.
How long can flexible duct be in attic?
Should be no longer than 25'. And you can buy it on the right.
How long should ductwork runs be before extending main duct?
There are no regulation for this matter. You can set a heat run right on the plenum.
How much air for microwave vent?
As much as microwave can produce…
How much drop does a condensate drain need on an air conditioner?
At least 1/8" per foot.
How much fresh combustion air required for gas furnace?
There is a method on how to determine amount like this, just read on this page.
How often should ac ductwork be replaced?
If it is in a good shape, then never.
How to attach duct to microwave?
It is not difficult at all! The re is step-by-step tutorial on this page (below).
How to attach plenum to furnace?
You should attach plenum to furnace with several ½" zip screws.
How to cap or plug unneeded heating duct vents in ceiling?
Disconnect it from hanger, put a 10 x 4 end cap on, push it up and fix the drywall.
How to connect new ductwork to existing basement ductwork?
This is a very simple DIY project, but at first, buy my Ductwork Installation Guide book.
How to cut plenum down?
Learn how to do it in Chapter #38 (below) of my DIGuide book.
How to cut top of ductwork?
You can cut the top of ductwork with red or green aviation snips. Do not have one? Buy it on the right.
How to duct microwave exhaust to outside?
Find a solution on this page (above).
How to effectively cover a cold air return and not compromise the efficiency of your furnace?
This is a good question, find a solution on this page (below)!
How to eliminate sound transfer in cold air return?
In order to achieve that you have to use an acoustic duct liner, but you cannot install it on your existing system, because it should be glued to the ductwork inside.
How to get furnace ductwork to not bang and make noise?
Find a solution on this page (below).
How to hook up return duct to main duct?
Well, it is not really simple question, but you can learn how to do that in the Chapters #34 - #36 of my Ductwork Installation Guide.
How to install a toe kick heat register?
You can get step-by-step tutorial in a Chapter #1 of the Kitchen Remodeling Edition e-book.
How to install additional take off to heating duct?
I have a paid page that answers to this question.
How to install an hvac sheet metal register?
You can find step-by-step explanations in Chapter #52 on this page.
How to install ceiling register?
If for the finished basement, you can find step-by-step explanations in Chapter #6 on this page.
How to install cold air return to furnace room?
No cold air returns from mechanical rooms allowed by code.
How to install commercial duct?
You can find the answer on this page.
How to install crawl space ductwork for a gas furnace?
Just like in a basement.
How to install ducts to plenum in home heating system?
Read Chapter #38 of my Ductwork Installation Guide book.
How to install dampers in ductwork?
Pierce a hole in a duct with a scratch awl, by turning it back and forth make a hole larger, insert damper, put on a handle and tighten it up with the wing nut. And you can buy a scratch awl here on the right.
How to install ductwork for bathroom fan?
You can find step-by-step explanations in the Chapter #23 on this page or below.
How to install rectangular duct?
You can find step-by-step explanations in the Chapter #39 on this page or below.
How to install suspended furnace in attic?
I do not have a tutorial for the attic, but its similar installation, which is described in the Chapter #62 from my Ductwork Installation Guide book or below.
62. Uncommon Cases – the chapter presents a wide variety uncommon cases of the Rough-in, basement and others
Are you looking for work? Not yet? When you will, they are going to ask you about your experience and it should be at least from three to five years or even more than that! However, under a good supervision one year is just enough to put your hands on it!!
installations, such as: pool fan installation, suspended furnace installation, etc.
CONCLUSION – the chapter wishes good luck in a new profession.
So, why do they need more, are they crazy? No, they are not! They just need to know that you are able to do your job without asking too many questions!
My entire book is designed to help you out in this regard, but this chapter in particular! Once you have read this chapter, undoubtedly, you can claim that you have a knowledge equal at least of ten years of experience!
The chapters have 65 pictures; 26 pages*. $5.00 (Instant Access). On 06/24/2013 25 more pictures added. Examples of Pulte Homes ductwork installation were also inserted in this chapter.
How to make ducts?
First off, buy a tin shop...
How to quiet ductwork when walking on floor?
I believe you can fly! But seriously, stay on my site and read on this page for God sake.
How to run an air conditioner trunk line?
This actually is a very complicated question, but you may find answers in my Ductwork Installation Guide book.
How to size hvac condensate drain?
There are no calculations for this matter, just use ¾" PVC pipes and fittings.
How to vent our microwave hood around 2 x 4?
Cut the stud, nail two headers, run exhaust through the wall. If you run it up or down it’s not necessary to be dead on center. Get more info on this page or below.
I have a 1700 sq. ft. two story house built in 1988 in the Atlanta area with central A/C. The only return is on the first floor at the bottom of the stairs. The Master bedroom is over the garage and has a vaulted ceiling. Heat gets trapped in the room during the summer as well as in the upstairs hallway that has three bedrooms and a bathroom off of it. I'm thinking of installing a 400cfm exhaust fan near the top, gable end of the master bedroom and exhaust it into the attic in order to pull out hot air.
I'm also thinking of installing 350cfm exhaust fan at the top of the staircase in the upstairs hallway and exhaust it into the attic in order to pull out hot air.
Exhausting the air from the second floor into the attic. Will just make the whole house warmer/hotter. As that air will be replaced by unconditioned out door air. That your A/C is not large enough to cool.
Either find a way to get a return up there. or get an A/C for just the second floor.
I had my HVAC replaced recently and I was wondering if a 2" PVC is enough? The furnace exhaust diameter is 2", my vent run horizontally for 13ft. Also the vent is really close to the ground outside like 4inches (90 elbow is facing the ground).
Exhaust needs to be above the snow line. 2” is ok to certain lengths and size of the furnace. It should state this length in the install manual.
I have to put an air return vent above my bedroom door but the header is in the way.
Then do not put it there, run it through the wall or install a cold air return in the ceiling/wall.
I notice that every time the ac starts, I get a burst of warm air out of the supply grills. It goes away instantly then I begin to feel the cold air coming out of the register. Is this normal?
This is normal. The ducts are in the hot attic, the air that is just "sitting" in the ducts when the system is off will get warm. Once the system comes on and starts cooling, the warm air is blown out of the ducts and into the house.
Is a fresh air intake recommended for heat pump systems?
Is it good to install ductwork in attic?
No, furthermore, personally I consider it as a crime!
Is it normal to have moisture on outside of plenum when air is running?
Is it safe to run your central heat if the outside unit is disconnected?
If this is a furnace only, then yes, but if this is a heat pump it won’t work anyway.
Is it worth moving return registers close to ceiling?
Is there a good web site that explains how to install ductwork?
Wake up dude you are already there!
Is there a guide for pop noise removal?
Yes, you can find it on this page and it is working already for five years on my site flawlessly!
My house vent duct sweat and rotted my floor!
Really? Then stay on this site and go to this page.
Notes on hvac installation.
There are hundreds of them in my DIGuide e-book.
Our furnace is 20 years old and needs replacing. The problem is our house is just over 4200SF and the builder did not 2 zone the air and heat we have a 150,000 BTU furnace and so far the 2 guys that came over for an estimate says they do not make a high efficiency furnace in that size. One guy said he would try connecting 2 smaller units in parallel. The other guy wants to redo the duct work and 2 zone it, (way too much $$$, we will never recoup that cost). My question is what can I do?
A 150,000 BTU input 80% efficient furnace, is 120,000 BTUs output.
A 120,000 BTU input 95% efficient furnace is 114,000 BTUs output. Doubt you will miss 6,000 BTUs.
A load calc will probably show that a 120,000 95% input furnace is more then enough heat for your house. You can do your own load calc and find out what size you really need.
Two furnaces can be twinned to get the size you need, if it would turn out that you need the full 120,000 BTU output. The new furnaces will have instructions how to twin them. Done right, you will end up with a nice two stage heating system and probably save a lot of money on your heating bill.
Should an air conditioner condensate drain into a washing machine trap?
Yes, you can use it if you are out of the other options.
Should my cold air return duct in the attic be sealed tight?
Should you insulate ductwork in walls?
If these are the exterior walls then yes.
Should you put a filter in the return air grill?
If it's designed for a filter then the answer is yes.
Tools for cutting sheet metal.
See them all on this pageor below.
Types for heat duct rigid or flex.
Rigid is always better.
Video installing duct work around perimeter of unfinished basement.
Learn how to do it in Chapter #55 of my DIGuide book.
What are recommended humidity settings in a cold climate?
40% - 50% RH.
What causes return air vent to whistle?
Most likely lack of cold air returns.
What do I need to make my own ductwork?
As I've said above, buy a tin shop or you can learn a very simple technique on this page.
What do you do when your old cold air returns are dented?
Well, I have a quiz dedicated to this issue. Find an instant answer to this question on this page.
What do you have to do to get your ductwork moved from under your house to above it?
Well, you must gut your house.
What gauge duct for dryer venting?
30 gauges is enough.
What is back drafting on a gas furnace?
It’s when furnace or/and water heater fumes are drawn back into the basement.
What is circumference of 4" ductwork?
Are you kidding? I guess this is back to school time!
What is a low loss fitting used with AC charging hose. How does it work?
To prevent refrigerant from leaking when disconnecting from the service valves.
What is purpose of the T line behind the condensation trap?
It is designed for the cleaning purposes.
What is the best way to run your hvac ducting in the attic?
The best way is not to run it at all, otherwise look around I have quite a few paid and free pages dedicated to this issue.
What's the easiest way to go through my crawlspace looking for leaks to tape off in my ductwork?
Cover up ½ of the supplies and turn the fan on. Should be able to feel where the air is blowing out at then.
What is metering device and what does it do?
The metering device breaks down the pressure on the refrigerant, from high pressure liquid going into the evaporator to a much lower pressure saturated (both liquid and vapor) refrigerant on the other side of the metering device. As the refrigerant travels throughout the evaporator it's slowly all changing state to pure vapor as it picks up (extracts) heat from the air travelling over the evaporator coil, as well as pulls moisture from the air during this procedure. By the time the refrigerant leaves the evaporator it should be all vapor, if not, there is something wrong with the system.
What kind of ductwork do you use for kitchen exhaust systems?
Just regular sheet metal ducts.
What material do I need to cover a cold air return?
Sheet metal, Thermo Pan, drywall.
What tool do I use to cut into the top of my supply plenum?
It is not allowed by code to cut into the top of the supply plenum.
What type of ductwork do I need to run return fresh air supply to furnace?
You can use insulated flex.
What type worker extends ductwork from dryer to outside vent?
C'mon, even you can do it, just read Chapter #26 from my Ductwork Installation Guide book.
What would happen if you install microwave without the vent?
Really not much, you just cannot get rid of the smell completely and have to change filters more often.
Which duct installation is proper? Both supply and return registers on inside walls or outside walls, supply register on outside and return register on inside, supply register on inside and return register on outside.
The second one. For more info visit this page and download a pdf file, it's free of charge.
Who can install kitchen microwave ductwork?
Who can perform heat loss gain calculations?
Even you can do it, just purchase calculation software online.
Why my dryer exhaust constantly clogs with moist lint?
Because you are not using a dryer exhaust booster! Buy it on the right on this page.
Why you should not add fresh air intake to home furnace?
This is an interesting question. But really, why?
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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