HSPF2

Related terms

• Heat Pump

  An electric system that moves heat instead of burning fuel, providing both heating and cooling. Highly efficient; cold-climate models now…

• Humidifier (Whole-House)

  A unit added to the furnace adding moisture in winter for comfort and to protect woodwork and floors.

• Hose Bib / Sillcock

  An exterior faucet; frost-free types extend the valve inside the wall to prevent freeze-burst. A common winter failure point.

• Hydronic Heating

  Heating that circulates hot water through baseboard, radiators, or floor tubing. Comfortable and quiet; slower to respond than forced air.

• Heat-Pump Water Heater

  A hybrid tank that pulls heat from surrounding air — 2–3x more efficient than electric resistance. Needs space and produces cool exhaust…

• Junction Box

  An enclosure where wires connect; all splices must be in an accessible box, never buried in a wall. A common code violation in DIY work.

• Heat Exchanger

  The furnace component that transfers combustion heat to household air while keeping flue gases separate. A cracked heat exchanger is a ca…

• Knob-and-Tube Wiring

  Obsolete early-1900s wiring with no ground. Often must be replaced during remodels and can affect insurance and insulation.