Tip & How-To about Heating & Cooling

Remove that high efficiency air filter for A/C mode!

The high efficiency or pleated air filters are so restricitve a 500 cfm loss was found with new filters, thats a ton of air !! so remove the great filter for summer , winter is fine , heat is less affected by reduced airflow.

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1 Answer

why does furnace heat cut back?


You might try checking your return filter. The new filters (pleated 3 month, ie real expensive ones) cut back your air flow 35% from the amount the regular 30 throw away allow. When air flow reduces the temperatur from furnace increases and can cause inadvertant high temperature limits to trip. If you are using a clean return filter, next you need to physically observe the air inlet side of your cooling coil to see if it is blocking air flow due to being dirty. If you have trouble with seeing the inlet, you might need to get a professional to take the air handler apart.

Oct 29, 2012 | Goodman Manufacturing...

1 Answer

I have some heat, burners on, is there a way to get more heat air filters clean i dont know what to do


If you are using a pleated or high efficiency type filter, that is a problem, the high efficiency filters
actually restrict a great deal of airflow, a AC unit requires 500 cubic ft per minute of airflow per ton of refrigeration capacity, 500 sq ft of home per ton generally = 1500 sq ft home has a 3 ton unit or needs 1,500 cfm of airflow, both in heat and cool modes, Honeywelll Enalysises prove these filters even when new reduce up to 500 cfm of airflow, effectively making a 3 ton system a 2 ton in output due to airflow restriction, try removing that filter with the fan on, it likely is pulled in sold with a huge pressure drop caused by tj filters obstuctive flow capabilities.
And 755 of all A evaoprator coils have been plugged or restricted by dust , dirt, oils from cooking, cigarrettes, running with no filter etc, a chemical cleaning of the evap coil above the firnace, or brlow it is indicated as a possible issue. Use the cheap 99 cent seee through filters we used to use

Dec 27, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

I have a tempstar 5ton 13 seer a/c unit. It keeps freezing up. I have check the freon, the filter and even put a larger blower motor on it. What else could be the problem?


The problems cold be to small a return air. I do a lot of cool surveys where I check the efficiency of the AC. Some people are putting in Heppa pleated filters and they realy restrict the air flow a great deal. You need at least 1.25 square feet of filter area per ton. 5 ton should have 24 by 36 return. Check to see if coil is dirty. Check air temp. across coil. From return to closest vent. Should be between 18 to 23 degress. Rusty

Jun 03, 2009 | Heating & Cooling

1 Answer

should gas pak fan run on med hi during heating


Thanks for your question,
As far as what speed to run your unit, the speed should be around med, now as far as what type of filter for your system, a pleated style filter will keep the dust level down alot better than media or horse hair, these two do work but let alot of dust through, yes pleated will cause a little more air restriction, but not to the point of causing your unit to run badly, but here is the trick, you must change your filter monthly, no exceptions, to maintain the best efficancy, to lower your power bills, a clean filter is the best preventitive measure you can do for your system, now there are washable style filters on the market, they work great, all you have to do is take it out and wash it off, shake it out, and put it back in place, it costs a little more but the overall savings is worth the cost, I hope this helps to clairify your question about filters, please rate this for us , and thank you again for your question,
mr.grzz

Jan 23, 2009 | Heating & Cooling

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