Direct vent
Definition to come.
Where it comes up
- Gas furnaces
How a gas furnace heats, what AFUE means and the signs worth a closer look
- Home ventilation
Fresh air, bathroom and kitchen fans, range hoods, and ERVs and HRVs
- Gas water heaters
Gas water heater types, burning air, venting and the signs of backdrafting
- How gas appliances burn and vent
Combustion air, flues, vent categories and condensing furnaces
- Venting and chimneys
How exhaust leaves the house, backdrafting, tests and signs to notice
- What affects the cost
Size, efficiency, ducts, permits and refrigerant: what moves the cost of HVAC work