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Are ductless A/C units worth considering as a replacement to our aging central AC with poorly performing ductwork?

by LiveModern Webmaster last modified Jun 19, 2013 01:09 AM
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by last modified Jun 18, 2013

We have a 1920's 2 story dutch colonial with good attic (spray foam) and basement - partially finished- (spray foam and polyiso) insulation but nothing in the 1st and 2nd floor walls. Heat is forced air natural gas, with central AC. The AC was added after the fact. All 2nd floor supply runs are inbetween the studs without ducts. In servicing the AC this year a full replacement was recomended (r-22 system with probably leak) to include the furance. Though a wholy new system would perform better for sure, the poorly designed ducts will still limit upstairs cooling. We do not mind the tempature differential in heating season, but it's worse, and bad for sleeping, in the summer (~12 degrees summer ~ 8 in the winter). As the furnace is stil functioning, and 95% efficient, I am curious about changing to multiple ductless AC systems and removing the central air. Downstairs is relatively open, upstairs is not (4 bedrooms), 1650 squ ft total.




 

 

We have a 1920's 2 story dutch colonial with good attic (spray foam) and basement - partially finished- (spray foam and polyiso) insulation but nothing in the 1st and 2nd floor walls. Heat is forced air natural gas, with central AC. The AC was added after the fact. All 2nd floor supply runs are inbetween the studs without ducts. In servicing the AC this year a full replacement was recomended (r-22 system with probably leak) to include the furance. Though a wholy new system would perform better for sure, the poorly designed ducts will still limit upstairs cooling. We do not mind the tempature differential in heating season, but it's worse, and bad for sleeping, in the summer (~12 degrees summer ~ 8 in the winter). As the furnace is stil functioning, and 95% efficient, I am curious about changing to multiple ductless AC systems and removing the central air. Downstairs is relatively open, upstairs is not (4 bedrooms), 1650 squ ft total.

Andrew,

Thank you for your question concerning ductless mini split HVAC systems.

Someone has done a lot of good things to your home with regards to the spray foam insulation, but the...


 

 

 
 
 

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