Yes, however my pool is only 82. And my green house has no heater. You do make a compelling argument though
how could I use a #Bitcoin mineers to heat my pool
You need to put the miner in a tank of mineral oil and run the heated oil through a heat exchanger to heat the water and then pump the hot water into your pool. This video might be helpful https://www.youtube.com/watch?v=kBwhCawzL1U
BURN IT DOWN