Mitsubishi M series vs P series
cweedon
| Posted in Mechanicals on
I am coordinating construction of a new municipal garage in zone V.
The heating load is 36,000 btuh. The intent is to only heat the space to 50 degrees.
I understand the P series is more robust than the M series, but what does that mean in the real world?
Using two FH18’s to meet the load would seem to provide a significant improvement in the HSPF (7 to 9 in zone V). With that difference we could plan less solar PV to get to net zero. Thoughts? Thanks
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Replies
Don't know the answer, but replying partly to bump, but also to ask: is the 36K heat loss at 50° or at 65-70° (eg "normal" temps)?
Also, the minimum heating temp on these is 50°. Whatever you decide, you should check the minimum output, so that they don't cycle excessively in the fall/spring.
The 36K heat loss was calculated at 68 deg. The building is now built and we did use M series.
Seems to be working fine.