Combustion Air

Related terms

• Backdrafting

  Combustion gases (including CO) being pulled back into the house instead of up the flue, often from negative pressure caused by exhaust f…

• Combustion Air Code

  Requirements ensuring fuel appliances get enough air in confined spaces (e.g., a furnace closet). Tightening the envelope can trigger this.

• Cleanout

  A capped access fitting for snaking/clearing the drain line. Code requires them at intervals and direction changes.

• Combustion Venting (Water Heater)

  Atmospheric, power-vent, or direct-vent options for gas water heaters. Switching types during a remodel affects venting and combustion-ai…

• Circuit Breaker

  An automatic switch that interrupts a circuit on overload or short, resettable unlike a fuse. The modern overcurrent device.

• Condensate Drain

  The line removing water the AC coil pulls from the air. Clogs cause overflow and water damage; a safety float switch is recommended.

• Central Air Conditioner

  A split system with an outdoor condenser and indoor coil that cools the whole house through the existing ductwork.

• Condenser

  The outdoor unit that rejects heat removed from the house. Needs clearance and airflow; undersizing or dirty coils kill efficiency.