Radiant Floor Heat

Related terms

• Receptacle / Outlet

  The point devices plug into. Tamper-resistant receptacles are now code in dwellings; spacing rules govern how many a remodel must add.

• Plenum

  The main air chamber off the furnace/air handler from which supply ducts branch and into which the return delivers.

• Recessed Can / LED Downlight

  Ceiling-flush lighting on a planned grid. IC-rated/airtight housings are required in insulated ceilings to prevent heat and air-leak issues.

• PEX

  Cross-linked polyethylene supply tubing — flexible, freeze-tolerant, fast to install with fewer joints. The dominant modern repipe material.

• Recirculation Pump

  A pump delivering near-instant hot water at fixtures by keeping the line warm. Saves water; adds energy unless on a timer/demand control.

• Permit & Inspection (Mechanical)

  HVAC, gas, electrical, and plumbing work is permitted, inspected trade work. Unpermitted mechanical work is a safety and resale liability.

• Refrigerant

  The working fluid that carries heat in an AC/heat pump. R-410A is being phased down to lower-GWP refrigerants (e.g., R-454B) under EPA ru…

• P-Trap

  The U-bend at each fixture holding water that blocks sewer gas from entering the home. Every fixture needs one, properly vented.