Romex / NM Cable

Related terms

• Sediment Trap / Drip Leg

  A short capped pipe at a gas appliance that catches debris/condensate before it reaches the valve. Code-required and a common inspection…

• Return Air

  Ducting that draws room air back to the system. Insufficient return is a common cause of weak airflow and short-cycling.

• SEER2

  The current seasonal cooling-efficiency rating for AC and heat pumps (replaced SEER in 2023). Higher SEER2 means lower cooling energy use.

• Register / Grille

  The supply outlet (register, with damper) and return inlet (grille) terminating the duct in each room.

• Service Entrance

  Where utility power enters the home — drop/lateral, meter, and main disconnect. Upgrading it is often the gating cost when adding major l…

• 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…

• Service Panel / Load Center

  The breaker box distributing power to circuits. Capacity (e.g., 100 vs. 200 amp) and free breaker spaces decide what a remodel can add.

• 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.