Our house is a mid-1950's ranch. When we moved in 3 years ago, we had to update/upgrade it electrical system. In the next couple of years, we'd like to update/upgrade its ventilation ducting (original?), heater (1973), and maybe add A/C to bring it up to today's air quality and energy standards. Is there an all-in-one kind of contractor that will help us do a whole-system approach?
We live in a fairly temperate climate with only about 3-10 days of frost in the Winter but about 7-15 days of very hot days in the Summer/Fall. The heating ducts run through the unconditioned crawlspace & the returns (?) run through the unconditioned attic. The house has NO insulation in the walls, and only about 2-3 inches of rock wool in the attic. And, it is built primarily over a vented crawlspace (the garage and enclosed patio have concrete slab). The garage has a ceiling that connects it to a common attic.
When we talked to one HVAC contractor, he didn't seem to want to do anything to the ducting (validate its size, etc.) except eliminate the heating ducts to the enclosed patio. When we talked to 2 insulation contractors, they did not want to talk about what to do with air flows (natural beneficial venting) and air leaks (natural non-helpful venting).