MRCOOL’s 24 SEER2 vs Zone Air’s 23 SEER2: compare winter needs. MRCOOL is the...

https://trevorscoolthoughts.cavandoragh.org/how-much-can-i-save-by-diy-installing-instead-of-paying-an-hvac-contractor

MRCOOL’s 24 SEER2 vs Zone Air’s 23 SEER2: compare winter needs. MRCOOL is the better value above -15°F; Zone Air Hyper Heat keeps heating down to -22°F. Choose by your local lows, not just the efficiency rating, and match the system to your home carefully