[Christ]

If you've got the "under the fridge" heater/pump setup, one thing you can do is move the fridge to an area of direct airflow, such as near a vent in the floor. The flow will keep the room air moving under the fridge and keep the heat from penetrating into the food compartment.

Likewise, a small computer fan can handle that flow requirement and burns mW, which, since the pump isn't heating the fridge compartment, could nullify some of the power use of the fridge as well, while providing that little bit of heat energy to the house during cooler months, also helping to negate the need for heat by that little bit.

Passivhaus concept.