Most heat pumps aren't going to last 30 years. Passivhaus only needs 1500W maximum of heating, so they usually don't use heat pumps. Wind and solar also lock i

Most heat pumps aren't going to last 30 years. Passivhaus only needs 1500W maximum of heating, so they usually don't use heat pumps. Wind and solar also lock in natural gas usage, because they don't provide inter-seasonal storage or even intra-day storage.