Feeder

Related terms

• Subpanel

  A secondary panel fed from the main, adding circuits for a remodel, addition, garage, or shop. Requires correct 4-wire feeder and isolate…

• First-Hour Rating / GPM

  How much hot water a heater delivers in a peak hour (tank) or gallons-per-minute (tankless). The right sizing metric, not just tank gallons.

• Expansion Tank

  A small tank absorbing thermal expansion on a closed system (with a backflow preventer/PRV). Code-required in many areas to protect the h…

• Flue / Venting

  The pipe carrying combustion gases safely outside. Improper sizing, slope, or material is a serious carbon-monoxide hazard.

• Evaporator Coil

  The indoor coil (usually atop the furnace) where refrigerant absorbs heat from house air. Paired and matched to the condenser.

• Fuel Conversion

  Switching an appliance/home between gas, propane, and electric. Affects venting, gas sizing, electrical service, and rebate eligibility.

• ERV / HRV

  Energy/Heat Recovery Ventilators that supply fresh air while recovering heat (and, for ERV, humidity) from exhaust. Key for tight, health…

• Furnace

  A forced-air heater burning gas/oil or using electric elements, distributing heat through ductwork. The most common U.S. central heating…