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Current HVAC system is 1997 York 3.5 ton rated at 8 SEER. House is two-story with HVAC system in basement. Issue is 2nd floor summer heat buildup and winter cold and current system is struggling. ASI return guideline is 400 cfm per ton. For my system that is 1400 cfm. Meaning: 1st grille opening: 24x12 = 576 cfm or 21% lose 2nd grille opening: 12x 9 = 228 cfm or 71% lose Two solutions: 1) rip out the old and do it right size. Issue: my wife does not want to ripe open walls. 2) Do nothing on the 1st floor, but put a blower behind the grille on the 2nd floor. Test: secured a 5in portable fan to the 2nd floor opening. It changed the temperature within an hour. | ||
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You're a first time poster, so you probably won't see this. But, try posting your question here: http://handymanwire.com/ubbthr...hreads.php/Cat/0/C/1 in the HVAC forum. I don't know enough about HVAC systems to give you an answer. You won't get an answer from Mike here only other viewers or non-viewers as the case may be. General Disclaimer Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance. My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night. | |||
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