Welcome to the Rural Energy "P" Glossary Terms!

A heating appliance that burns compressed wood or biomass pellets to generate heat, commonly used as a renewable and efficient alternative to traditional wood stoves.

PelletVent pipe is a type of venting system specifically designed for pellet stoves and pellet-fueled heating appliances. It is made of stainless steel and features a twist-lock design for easy assembly. PelletVent pipe safely vents combustion byproducts outdoors while ensuring efficient operation of pellet stoves.

The complete oxidation of all the combustible constituents of a fuel, utilizing all the oxygen supplied.

The hydrogen ion concentration of a water to denote Acidity or Alkalinity. A pH of 7 is neutral. A pH above 7 denotes alkalinity while one below 7 denotes acidity. This pH number is the negative exponent of 10 representing hydrogen ion concentration in grams per liter. For instance a pH of 7 represent 10-7 grams per liter.

A Piezo ignition consists of a small, spring-loaded hammer which, when the button to ignite is pressed, hits a crystal of PZT (lead zirconate titanate) producing a high voltage and resulting in an electrical discharge that ignites the fuel gasses.

A flame which is utilized to ignite the fuel at the main burner or burners.

Material wrapped around pipes in heating systems to reduce heat loss or gain and prevent freezing, improving system efficiency and performance.

A concentrated attack by oxygen or other corrosive chemicals in a boiler, producing a localized depression in the metal surface.

A small heating device installed near the point where hot water is needed, such as under-sink water heaters or instant hot water dispensers.

Air that has been warmed before entering a heating system or combustion chamber, improving combustion efficiency and reducing fuel consumption.

An automatic pressure relieving device actuated by the pressure upstream of the valve and characterized by opening pop action with further increase in lift with an increase in pressure over popping pressure.

A heating system in which the fluid, such as water or antifreeze, is maintained at a higher pressure than atmospheric pressure to prevent boiling or cavitation.

The main heating system in a building or home, responsible for providing the majority of the heat required for comfort.

A loop in hydronic heating systems that circulates heated fluid from the heat source, such as a boiler, to the distribution system, such as radiators or underfloor heating.

A thermostat in heating systems that allows users to set pre-programmed temperature schedules for different times of the day or week, optimizing energy usage.

This measures pressure by one pound per one inch