1 HVAC unit only for entire home?
This is a bit after the fact - as we are in our 9th month in the newly built house - what if our multi-zoned Heat Pump had gone out or as the case this past during the cold spell we had in Central VA recently?
Would it have been better to build with more than 1 HVAC unit in a house?
When we built our house & the budget drove every decision, it was based on the premise that building a class leading tight house & using a heat pump in moderate climate would be the best bang for the buck.
& so far - the balance sheet shows that as we now spend ~70% LESS to heat & cool a 3K sqft house vs. the quarter of the size condo we were living in prior.
We are ecstatic with that as the financial modeling went better than planned.
Except this past summer when the coils went bad on the new HP & as we sweated for a week waiting for it to be repaired, wondering why we didn't get a 2nd unit to operate another zone.
So in retrospect, is there any conventional wisdom in respect to building with an individual HVAC unit that does the job excellently vs. 2 that possibly save us once in a blue moon?
The answer wasn't obvious to us & still isn't...