I am looking to install 2 Carrier Greenspeed 4-ton (25VNA4) in my 1-story, 3400 sq ft, 1997-built single-family residence in Tampa, FL. Currently, I have two 4-ton single-stage heat pumps on their last legs (a 1997 vintage Trane, and a 2003 vintage Nordyne). The air distribution is really good--no hot or cold spots. One system is for the right side of the house, and the other is for the left. The load is almost perfectly split (approx 1700 sq ft per side see picture attached and "x" marks the spot of the air handlers). Air handlers and ductwork is, unfortunately, in the unconditioned attic.
I've read here that variable systems that are not zoned tend to cause air distribution problems when the unit ramps down. My preference is to not zone the two systems as the temperature is currently even throughout the whole house, and I have no desire to have separate temperatures for different parts of it.
Also, the ductwork is in good condition and right-sized.
Could my house be the unicorn that does not need zoning to have even distribution?
Thanks!
I've read here that variable systems that are not zoned tend to cause air distribution problems when the unit ramps down. My preference is to not zone the two systems as the temperature is currently even throughout the whole house, and I have no desire to have separate temperatures for different parts of it.
Also, the ductwork is in good condition and right-sized.
Could my house be the unicorn that does not need zoning to have even distribution?
Thanks!
source https://hvac-talk.com/vbb/showthread.php?2222141-Zoning-always-necessary-for-variable-systems&goto=newpost
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