90 yr old house here. Steam heat, crappy vinal windows from the past 20 years, vermiculate insulation (asbestos risk??). I like the idea of recessed units with

90 yr old house here. Steam heat, crappy vinal windows from the past 20 years, vermiculate insulation (asbestos risk??). I like the idea of recessed units within the central wall with condensers in the attack. I need to vent the heat somewhere. Maybe if I get rid of all the gas (water, furnace), I can vent out the chimney.