England's Stove Works recommends professional installation of our hearth products. *Always follow local codes. Refer to your stove and vent pipe owner's manuals, and contact the manufacturer with any questions.
Outside air intake is mandatory for all England's Stove Works freestanding pellet units, to overcome the effects of negative pressure inside of the structure in which it is being installed. Newer houses are especially prone to this due to better building technology, but all homes, no matter how drafty they seem, are effected in this way.
WOOD STOVES - Please note that we also have Outside Air Kits available for our wood stoves, as some homes are built in such a way that outside air would benefit a wood stove, for the same reasons listed for pellet stoves. See your wood stove's part page on our store and call (800) 245-6489 with any questions.
(Outside Air Installation Diagram)
Since the early 1970's homebuilders have built houses in such a way as to make them more economical to heat and cool with electricity . This is done by making the house more airtight than was practiced in the past, which diminishes loss of heat through drafts and leaks in the home's structure. In addition, a lot of older homes have been renovated to gain efficiency.
This tightly-built construction can cause problems with combustion devices such as woodstoves and pellet stoves - more so with pellet units, as a higher quantity of airflow is required for the unit to burn its fuel effectively. Running a pellet stove using air pulled from inside the structure can lower the air pressure in the home in relation to the air pressure outside the structure, and this is known as "negative pressure."
Negative pressure buildup inside a home reduces the unit's ability to receive the proper volume of air needed to effectively burn the fuel, and drastically reduces the performance of the unit. The size of the structure does not matter in relation to negative pressure. Outside intake air defeats the buildup of negative pressure, as the airflow comes from directly outside, and is then exhausted back outside after combustion.