Did you actually install them in-line with your HVAC system, or is it more or less passive heat? Seems like you could run your intake through the server rack after the filter and you'd be able to get double duty out of both your HVAC blower and the heat from your rig? I've actually given this a little thought, but not yet to the point of doing calculations, so I'm curious what your experiences have been.I'm heating half my home with rigs running 24/7 right now ~1600 watt, though not been super cold yet
Bet SOES didn't expect his thread to veer off in this direction!