The air-filter tag has no wiki summary.
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1answer
21 views
How do I wrap the pre-filter around the HEPA filter in this air purifier?
I bought this air purifier and was installing the pre-filter that came with it. The instructions go "Carefully wrap the pre-filter around the HEPA filter so that the ends meet. Fasten the ends ...
4
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2answers
805 views
Which way does air flow into a furnace?
Which way does air typically flow in a furnace? Put another way, does the filter usually sit before the incoming cool air reaches the burners or after?
I'm trying to figure out which way the air flow ...
3
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2answers
337 views
Why does the pilot light go out when the furnace is running?
Every time the furnace fires up, it blows out the pilot light. Sometimes it will run a full cycle and blow out when it shuts down, and sometimes it will blow out about a minute into the cycle.
We ...
1
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2answers
355 views
Is there a filter-reminder thermostat that uses run-time instead of total time?
My HVAC filter is in my crawlspace and is a hassle to change. I don't want to change it more than needed. "Change it every month" is bogus advice because in some months (like May) we don't have to run ...
2
votes
1answer
134 views
Will an electronic air filter harm my furnace?
If I install a furnace-mounted, electronic air filter, like this one,
will it harm my furnace due to reduced air flow? How will I know if it reduces air flow too much?
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3answers
1k views
Can I sense filter replacement need based on filter pressure drop?
I should first point out that the system I'm referring to will be a self build DIY project. Fan and Filters being the only items purchased complete, And I'm still in the design phase but I'm not a ...
4
votes
1answer
778 views
What would cause my furnace to only work with the filter removed?
My Carrier furnace works fine without the air filter in place on the return. With the filter in place it works for a while and then stops with a complaint about "limit, or flame rollout is open" ...
3
votes
2answers
290 views
Why is my furnace filter alarmingly clean?
I have central air and heat at my appartment I moved into about 6 months ago. Today I decided it was probably long past time to figure out how to change filters in the furnace so I poke around until I ...
1
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3answers
256 views
Are 5" thick filters for furnace/Central AC still available?
My furnace/AC was installed about three years ago. It uses 16" X 25" X 5" filters. The problem is when I try to find a replacement at my local home center: at Lowe's, Home Depot, (you name it), I ...
7
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2answers
177 views
How to detect mildew or fungus?
We live in an apartment, and since a couple of months, my girlfriend suffer from all sort of lung/breath/throat problems. ( Multiple visits to the Doctors give the same result: she has nothing, might ...
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6answers
1k views
What should I do with old furnace filters?
I seem to be stock piling used furnace filters, are there any uses for these things once the furnace is done with them? It seems a shame to throw them out; given that I change them once a month, ...
3
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3answers
1k views
Why would a furnace overheat with a standard density filter?
Some time ago I found my furnace (gas, forced air, downdraft) was getting stuck on, blowing cold air. I could reset it, but it would happen again after a while.
After calling out a service man, I ...
1
vote
2answers
146 views
How do I choose a furnace airfilter?
I have a furnace/air-conditioner that can support filters of various thicknesses: 1", 2", or 4". Filters are available in various MERV ratings. How should I decide which filter to use?
7
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5answers
5k views
Where should my furnace filter go in a Lennox G40UHX series furnace?
I have a Lennox G40UH(X) series furnace, which is installed in our attic (We have a single-story house on a slab). Because the furnace is installed in the attic, it is "laying down" on its side, and ...
2
votes
1answer
283 views
Are High End Furnace Filters worth the cost?
There are many levels of furnace filters. I can get cheap ones at walmart of a few bucks. Then there are ones that cost upwards of $30. I realize that if you have allergies or low immune systems, ...
4
votes
5answers
907 views
How often should the air filter in the furnace be changed?
Does the period of change of this air filter have an affect on the longevity of the heating and a/c system? What is a good rule of thumb to require replacement?
