Heat from an in-vehicle storage tank can be recovered from a cold garage. An insulated hose would help more to a vehicle outside.
My roof gets a nice blanket of snow for several months, and chipping ice from the colder eaves to prevent pools of meltwater getting under the shingles is a springtime chore.
Burning natural gas should be done with a condensing vent, not a heat-operated chimney at a minimum. Realistically, high-grade energy should always be used to run a heat pump to multiply the yield for low-grade heat.
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There is no excuse for a land vehicle to weigh more than its average payload.
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