Have had a woodmaster 5500 for four years has worked fine with the factory set points of 160 start 170 shutoff when it was just the dhw, and 5000 sq ft house (new construction) and garage (attch). Just built and hooked up a 30 x 56 x 10 pole building r-19 walls and r50 lids and just had our first cold snap and it seems to be falling on its face as far has temp. Any suggestions? It was supposed to be sized to heat this amount when purchased. I thought it would help recovery to raise the set points. However can not find manual.