In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Just in case anyone is interested:
measured KWH, Gallons, and temperature change supply/return on our altherma for a full day yesterday.
-Water temps around 85 deg F.
-Outdoor Temp averaged 14 Degrees and the whole day was in the 11 to 16 degree range. 56 degree Days.
-We did see some "snow cake" as it was snowing HARD yesterday, which I think must reduce our output somewhat as it impedes airflow through the coils.
-Calculated heat load on the building is a bit shy of 33kBTUs/hr at a -4 deg F. outdoor design, or about 10,700 BTUs per degree Day.
-Total power draw of the 054 altherma and its backup heater for the 24 hour period: 36.5 KWH
-Total BTUs for the day were 258,772. Remember this was during a snowstorm, and we only had 3 people in the building. For the degree days we had, and our calculations, we'd expect to see 600,000 BTUs for the day. So at least on this day, our load is about 1/2 of what we calculated... And we calculate aggressively. I have to admit, this one takes me aback a bit. Makes me wonder if I'm missing something. Our warehouse level is about 64 average instead of 70, so that helps, but still.... no solar gain. Our infiltration calcs could be reduced but even if I eliminated infiltration entirely that's only half of this differential.
-Assuming we have real numbers though, our calculated COP for the day was 2.08 .
We'll let it run for more days and try a week long number next. since we do have a slab level, our numbers might shift depending on when the slab calls.
Still, pretty cool stuff. Monitoring rocks!
Designer for Rockport Mechanical
in beautiful Rockport Maine.