The Gas Appliance Manufacturers Association (GAMA) was a trade organization representing manufacturers of gas-powered appliances, including furnaces, boilers, and water heaters. It provided standards, certifications, and support to ensure the safety, efficiency, and quality of gas appliances. In 2008, GAMA merged with other organizations to form the Air-Conditioning, Heating, and Refrigeration Institute (AHRI), which now...

Garage heaters are heating devices designed to provide warmth to garages or similar spaces, especially during colder months. They can be powered by natural gas, propane, or electricity, and are typically used to maintain a comfortable temperature in spaces that may not be connected to a central heating system. Some models, such as separated combustion...

A component located within a gas furnace that is responsible for transferring heat generated by the combustion of fuel (such as natural gas or propane) to the air that circulates through your home. The heat exchanger keeps the combustion gases separate from the indoor air, ensuring that harmful byproducts like carbon monoxide do not enter...

A gas furnace is a component of an HVAC system that burns natural gas or propane to produce heat. This heat is then transferred to the air, typically using a heat exchanger. A blower fan circulates the warmed air through the ductwork and into the living spaces in your home. Gas furnaces are commonly used...

A gas package unit is a type of "all-in-one" HVAC system that combines a gas furnace for heating and an electric air conditioner for cooling in a single outdoor cabinet. This system is typically installed outside your home, with the only indoor component being the thermostat. Gas package units save indoor space since there's no...

A gas valve is a device used in HVAC systems to control the flow of natural gas or propane to equipment like furnaces, boilers, or water heaters. It is responsible for starting, stopping, or adjusting the amount of gas reaching the burner. This ensures the correct level of fuel is delivered for safe and efficient...

Pressure measured relative to the surrounding atmospheric pressure. It is the difference between the absolute pressure of a system and the atmospheric pressure. If the gauge pressure is positive, the pressure in the system is higher than atmospheric pressure; if it is negative, the system pressure is below atmospheric pressure. Gauge pressure is commonly used...

A grid-tie inverter solar system is a type of solar power setup that connects directly to the electrical grid. It uses a special inverter to convert the direct current (DC) electricity produced by solar panels into alternating current (AC), which is the type of electricity used in homes and businesses. This system allows homeowners to...

A grille is a vent cover with openings designed to allow air to flow into or out of an HVAC duct system. It is typically fixed in place and serves as a protective barrier while also directing the airflow. Grilles are often located on walls, ceilings, or floors and do not usually include adjustable dampers...

GWP stands for Global Warming Potential, a scale used to measure how much heat a specific greenhouse gas traps in the atmosphere over a set period of time, typically 20, 100, or 500 years, compared to carbon dioxide (CO2). CO2 is used as the baseline with a GWP of 1. For example, a gas with...