Heat pump selection
I need a bit more help with and HVAC project I started planning last year in zone 6, but couldn’t yet start until this year.
After a bit of redesign with our engineer I was about to sign the contract this year with my HVAC contractor when we hit a small snag.
Our final plan was to go with a Carrier system containing:
2x (40MBDQ18 + 38 MAQB18R)
Unfortunately, the 38 MAQB18R is discontinued and its replacement, the 38 MARBQ has lower modulation, especially in summer time when my loads will be lower:
I know 1:1 is usually favoured and multizones are a bit less efficient, but I keep wondering whether it would make more sense in my situation as the minimum modulation of the multizone is almost the same as that of the single zone.
I omitted some elements of the design for the sake of simplicy as this is the only contentious point that remains.
Thanks for your thoughts.
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