I am researching energy efficiency improvements because our air conditioner is not running very well any more. It turns out that now every major appliance will be a fridge.

Fridge: Is a fridge;
Heat Pump HVAC in heat mode: Outside is a fridge, inside is outside the fridge;
HVAC in cool mode: Your house is a fridge;
Heat Pump Water Heater: Your basement is a fridge, your water is the outside;
Heat pump clothes dryer: Your laundry room is a fridge, your clothes are the outside.

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