williamwright wrote on 29/11/2020 :
I've got two of these and they work fine. They draw about 1A but cycle on and
off depending on the thermostat setting. The don't half make a lot of heat.

Mine chucks out a little over 5Kw. It gets my system up to temperature
in 20 minutes from below freezing whilst still parked in my garage, at
the cost of a few ml of diesel.