2,400+ Definitions
HVAC GLOSSARY
Every HVAC term, acronym, and industry phrase — defined in plain English.
Small Appliance Category
The Small Appliance Category encompasses refrigeration and air conditioning equipment…
Smart Grid HVAC
Smart Grid HVAC systems integrate advanced sensors, controls, and communication…
Smart Home
A Smart Home is a residential property equipped with interconnected…
Smart Home Energy Management
Smart home energy management integrates automated controls for heating, cooling,…
Smart Meter
A smart meter is an advanced utility meter that records…
Smart Register
A smart register is an electronically controlled vent damper that…
Smart Thermostat
A smart thermostat is an internet-connected control device that learns…
Smart Thermostat Integration
Smart thermostat integration connects intelligent temperature control devices to home…
Smart Vent
A smart vent is an intelligent ductwork device that automatically…
Smoke Damper
A smoke damper is a motorized or automatic closure device…
Smoke Detector Integration
Smoke detector integration refers to connecting standalone smoke detection systems…
SNAP Program
The Significant New Alternatives Policy (SNAP) Program is EPA’s regulatory…
Snowmelt System
A hydronic radiant system embedded in pavement, driveways, or walkways…
Soft Starter
A soft starter is an electronic device that gradually increases…
Sol-Air Temperature
An equivalent outdoor temperature that combines the effect of solar…
Solar Absorption Chiller
A solar absorption chiller converts solar thermal energy into cooling…
Solar Air Conditioner
A solar air conditioner is a cooling system powered by…
Solar Appraisal
A solar appraisal is a professional assessment that determines the…
Solar Array
A solar array is a collection of multiple solar panels…
Solar Assisted Heat Pump
A solar assisted heat pump integrates solar thermal collectors with…
Solar Backfeed Breaker
A solar backfeed breaker is a specialized circuit breaker designed…
Solar Battery Bank
A solar battery bank is a collection of individual battery…
Solar Battery Storage
Solar battery storage systems accumulate excess solar energy for use…
Solar Billing
Solar billing encompasses the billing methods and compensation structures utilities…
Solar Buyback Rate
The solar buyback rate is the price per kilowatt-hour that…
Solar Canopy
A solar canopy is a shade structure with integrated photovoltaic…
Solar Carport
A solar carport is a parking structure with integrated photovoltaic…
Solar Cash Purchase
A solar cash purchase is an all-cash investment where a…
Solar Cell
A solar cell is the fundamental semiconductor device that converts…
Solar Charge Controller
A solar charge controller regulates power flow from solar panels…
Solar Clipping
Solar clipping occurs when an inverter reaches its maximum power…
Solar Collector Efficiency
Solar collector efficiency is the percentage of incident solar radiation…
Solar Combiner Box
A solar combiner box consolidates electrical connections from multiple photovoltaic…
Solar Combisystem
A solar combisystem integrates solar thermal collectors to provide both…
Solar Commissioning
Solar commissioning is the final verification process that confirms a…
Solar Concentrator
A solar concentrator is any optical system using mirrors, lenses,…
Solar Conduit
Solar conduit is protective tubing that houses and shields electrical…
Solar Cooling
Solar cooling uses thermal energy from the sun to power…
Solar Curtailment
Solar curtailment is the intentional reduction or shutdown of photovoltaic…
Solar DC Air Conditioner
A solar DC air conditioner operates directly on direct current…
Solar Disconnect
A solar disconnect is a switch that safely isolates photovoltaic…
Solar Domestic Hot Water
Solar domestic hot water (SDHW) systems use solar thermal collectors…
Solar Energy Dashboard
A solar energy dashboard is a user-friendly web or mobile…
Solar Energy Forecasting
Solar energy forecasting predicts the amount of solar power that…
Solar Energy Storage HVAC
Solar Energy Storage HVAC combines solar power generation, battery storage…
Solar Energy System
A solar energy system is a complete installation of photovoltaic…
Solar Farm
A solar farm is a large-scale photovoltaic installation designed to…
Solar Financing
Solar financing refers to the various methods homeowners and businesses…