A hermetically sealed pellet stove is a type of pellet stove that is designed to be extremely airtight and sealed off from the room where it is installed. This design ensures that the stove's combustion process is separate from the indoor air environment. Here's a detailed explanation:
Characteristics of a Hermetically Sealed Pellet Stove:
- Air Supply: In a hermetically sealed pellet stove, the combustion air is drawn from the outside, rather than from the room where it is installed. This means the stove does not use indoor air for combustion, creating a clear separation between the stove's operation and the indoor air quality.
- Exhaust System: The stove's exhaust gases are also vented to the outside through a sealed flue or chimney system. This prevents any combustion byproducts, including carbon monoxide, from entering the living space.
- Airtight Design: Hermetically sealed stoves are constructed to be extremely airtight. They have gaskets and seals to ensure that there is minimal air leakage between the combustion chamber and the room. This tight seal enhances the stove's efficiency and safety.
- Controlled Combustion: The hermetic design allows for precise control of the combustion process. The stove can be finely tuned for efficient and clean burning, resulting in reduced emissions and better fuel efficiency.
Installation and Airtight Houses:
Hermetically sealed pellet stoves are typically well-suited for installation in airtight houses with heat recovery ventilation systems. Here's why:
- Airtight Houses: In modern, energy-efficient, and well-insulated homes, airtightness is a priority to prevent heat loss. A hermetically sealed stove complements this by maintaining the overall airtightness of the house. It does not introduce outdoor air into the living space, which could disrupt the carefully controlled indoor environment.
- Heat Recovery Ventilation: Airtight houses often use heat recovery ventilation (HRV) systems to maintain indoor air quality while conserving energy. These systems exchange stale indoor air for fresh outdoor air, but they also recover heat from the outgoing air to pre-warm the incoming air. A hermetically sealed stove works well with an HRV system because it does not interfere with the HRV's operation. Combustion air is drawn directly from the outside, so it doesn't compete with the HRV for indoor air.
- Safety and Efficiency: Hermetically sealed stoves are considered safe and efficient in airtight homes with HRV systems. They reduce the risk of backdrafting, where combustion byproducts are drawn back into the living space, which can be a concern in tightly sealed homes.
However, it's essential to consult with a qualified stove installer and consider the specific requirements and recommendations of both the stove manufacturer and the HRV system manufacturer when installing a hermetically sealed pellet stove in an airtight house. Proper installation and compliance with local building codes and regulations are crucial to ensure safety and performance. Additionally, it's important to regularly maintain and service the stove to maintain its airtight seal and efficiency.