Welcome to the Rural Energy "P" Glossary Terms!

At Rural Energy, we understand that the world of renewable energy and sustainable solutions can sometimes seem complex and filled with technical jargon. That's why we've created this comprehensive Glossary Page – to help demystify and clarify the terms and concepts you'll encounter on your journey towards a greener, more sustainable future.

Whether you're a homeowner looking to make energy-efficient upgrades, a business exploring renewable energy options, or simply someone curious about the latest eco-friendly technologies, our glossary is here to provide clear, concise definitions.

RuralEnergy.com is more than just a resource; it's a community dedicated to advancing rural energy solutions that are sustainable, efficient, and practical. We believe that understanding the language of renewable energy is the first step in making informed decisions that benefit both the environment and your specific needs.

Your Partner in Rural Energy Solutions

As you explore our glossary, remember that Rural Energy is here to assist you every step of the way. From initial inquiries to the implementation of sustainable energy solutions, our team of experts is committed to providing guidance tailored to the unique challenges and opportunities of rural environments.

We invite you to use this glossary as a starting point for your journey into a more sustainable future. Should you have any questions or need further assistance, our team at RuralEnergy.com is always ready to help.

Let's embark on this journey together – towards a cleaner, more sustainable world.

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Pellet Stove

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.

pellet vent pipe

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.

Perfect Combustion

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.

Piezo Ignition

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.

Pilot light

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

Pipe Insulation

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.

Point-of-Use Heater

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

Pre-Heated Air

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

Pressure Relief Valve

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.

Pressurized System

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.

Primary Heating System

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

Primary Loop

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.

Programmable Thermostat

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

We Value Your Contributions!

At RuralEnergy.com, we believe that our Glossary Page is a collaborative and ever-evolving resource enriched by our community's diverse experiences and insights. If you come across a term or concept related to renewable energy or sustainable practices that you think should be included, we warmly invite you to share it with us! Your suggestions are invaluable in helping us ensure that our glossary remains comprehensive, relevant, and responsive to your needs.

Reach out to us through our Contact Page or email us your proposed terms and a brief explanation. Together, we can build a resource that truly reflects and serves the interests and curiosities of everyone passionate about rural energy solutions.

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