I totally agree, heat pumps are great! I have an air source heat pump that makes up for what the miners can't handle. However, the best form of heat available to me is biomass produced on my property and burned in a rocket mass heater. When I'm heating with wood, I run the miners as space heaters, trying to get closer to the concept of heat the person not the space. Each heating situation is dynamic and situationally specific but if you have miners there is a high incentive to figure out the best ways to use them.