Natural Gas System

This simple diagram pretty well describes the systems in our new home that will be powered by gas. The exception is the range, which will be electric. Also, we'll have two gas furnaces, one on the main floor and one for the daylight basement. The main floor system acts as a backup for a Lennox Heat Pump. The heat pump will be the primary heating and cooling system. However, when the temperature drops below the heat pump's ability to operate as efficiently as the gas furnace, the gas furnace will take over until the temperature rises enough for the heat pump to operate more efficiently.

The photos below trace the plumbing for the gas appliances from the supply and meter outside the east wall of the garage, into the garage, to the main floor furnace on the back garage wall, then the mud room, kitchen, through the east kitchen wall out to the deck to provide for a gas BBQ, then across the ceiling and down to the fireplace, and down to the furnace and the Navien tankless water heater in the storage room of the basement.

HVAC, continued, 9/23/2010

Main floor furnace will hang in the rear of the garage

This will make maintenance access relatively easy

Having two systems, one for each floor, involves lots of ductwork

HVAC Ducting and Registers Being Installed

The new house will have independent HVAC systems, one on the main floor, and one for the daylight basement. Main floor heating and cooling will be driven by a heat pump, with a gas furnace backup. The lower level will be handled by a standard gas furnace and air conditioner. Each level will have its own thermostat. There will also be a direct vent, gas  fireplace in the great room on the main floor.

Furnace in the storage room on lower level

Ductwork leading from storage area through kitchenette area

Ductwork going across kitchenette area to bedroom #3

Ducting separating kitchenette from rec. room will be "boxed" and look like beam

Heatpump and AC compressor will be located here, on east side of garage