HVAC Questions? Ask an HVAC Expert for Answers ASAP
Hello my name is XXXXX XXXXX going to help you out tonight.
How old is the house?
Have you had yearly check ups? Better yet if you have, have they checked the return air vents before?
I have had a check up every summer for my A/C and in winter for heat they basically just check the unit outside for whatever and change filter, ive only replace a fan motor on the unit outside and the contactor other than that i did have a guy for another company change all the flex line in crawl space to hard pipe
but to answer correctly no
this guy is the first to say anything about return air
Okay, I have seen what your stating allot. (unfortunately) As you stated the closet to the furnace is pulling well due to a short run. Few questions:
How many return air vents do you have?
as in oin floor right?
Also locations meaning are the low or high on the wall
Not the supplies just the returns
two...both in celing
one in corner of lv room downstairs one in center of hallway
no filters in them either
okay, the easiest way (without a company coming to your house w/ proper equipment) is to close off the one downstairs and see if you get any pull from the one upstairs?
That will tell you at the very least it's connected
i know its connected it does have a small draw in air and i went innto attic and checked
maybe a hole in line i didnt see?
i dont have any rodent issues in their i know that for sure tho
You may have seen at home depot before they sell big (as in diameter) magnets usually white and can be cut to size to close off return air vents.
So with a set-up like you have in the summer you would close off the 1st flr return as cool air drops and heat rises. Then switch in the winter/colder months
are u suggestion the one downstairs is robbin the other of some sort
Well the one downstairs is closet and your furnace is like a vacuum.
So to get the most efficiency closing off the returns in certain areas like i'm suggesting is necessary.
The reason there's no way to close a return vent like a supply vent is someone were to close all the returns they would burn up the blower motor. So you have to get the magnets and only close one at a time.
Keep in mind i'm advising you off the fact the HVAC company was out and your furnace/air handler is operating correctly.
ok so i should block off the dwn stairs and see if it creates a major suction upstairs as it should do to the vacuum effect, and alternate the magnet from winter and summer months....basically the cool air is being sucked out by mass air flow down staies and up stairs stays hot cause of that lack of flow and by closing off first floor the other can suck the hot aie out in turn helping keep it cool, and vise versa in winter
Yes this is the case.
Now depending on the length of the run you might now get the same pull you get from the downstairs one but it should be close.
and the HVAC company I use is very good in Seattle area so i trust them and that everything else is ok, wonder why he wouldnt mention that idea tho, i guess they have to check first and its about a 20 25 foot flex line thats about 12-14 ft round
you mean inches round?
okay scared me there :-)
i scare myself sometimes
im very hands on and as far as magnets go i think i can try that no sweat...
As long as you followed that flex line and made sure there are no kinks/obstructions it seems the design isn't the best.
And when you close off the bottom floor you will know for sure
Also check by where air filter goes that it's not sucking too much air from around that point.
Again i'm assuming the HVAC company checked that.
i know its not the best...gotta love builder grade, thats why i had all the flex in crawl was changed to 6in metal, but thats a whole other issue cause he did it different that original, i had two boxes with supplies in each, one box with about four lines in middle of run and another box at end of run with more supplies lines running, and he ran one new str8 line down center of house and teed off lines where need and added individual vents to every line
so lets assume the attic line is 100% good and the magnet trick doesnt improve vacuum, then what?
Yeah it happens. Flex is not the best and you have some long runs, for returns it's not as bad.
and i ty in advance for you help
Then that return is not fully connected somewhere. Here's what I want you to do if that happens
sell asap lol
If you have little pull at the upstairs after closing the bottom floor then go to the furnace and slowly pull filter out ,in fact do that now/b4 magnet so you will be able to tell if there's a difference. If there's little pull upstairs and you don't feel any difference pulling the filter out then the air is being pulled from inside walls/attic somewhere.
Now if you go to pull filter out and it's really hard then there's a blockage somewhere
ok and that would mean theirs a break in that lie or something for sure right
And obviously turn furnace off and open bottom floor so you don't burn up the motor.
But since your getting some pull upstairs i'm assuming once you close the bottom floor it will pull allot more
i think i understand....but i did go to public school..lol....ill give that all a try tomorrow for sure,
I went to public school too! In chicago no less.
No problem I think it will work fine once you close off the bottom floor. If you have any other questions you can come back here and I will respond
is it poss that my 20$ filters block to much vacuum
That could be adding to the issue. Also the thicker the filter the more strain your putting on the blower motor.
so in fernace world cheeper filters over the long run could save the life of parts and labor
I use 30 day cheap filters on my own furnace.
right on.....Im happy to pay in full for your help and let you know how it turns out. i hope it works.
Thanks for using JA. And remember if you need anything else just come back here and i'll respond.