Sphere V ventilated wood pellet stove

Positioning and installation

The positioning of the stove is important for successful even heating of the room. Before deciding where to place the stove, the following must be taken into account:

The stove must be installed on a floor with a sufficient carrying capacity. If the existing floor does not meet this requirement, appropriate measures must be taken (i.e. load distribution plate).

  • In the case of a wooden floor, install a floor-protection hearth (glass, ceramic or steel plate).
  • The minimum volume of the installation area must be 30 m³.
  • Installation is better in a large and central room in the house to ensure maximum circulation of the heat.
  • Connection to the mains supply is recommended using a 13Amp socket or a switched fuse spur.
  • IMPORTANT: If the installation of the product is near flammable surfaces, the minimum distances are indicated on the label located on the back of the stove.

The stove must be installed and assembled by qualified personnel. The stove installer must guarantee an installation with easy access to the stove and of the chimney.

Must Haves

The room must have external ventilation (minimum section 100 cm2) or as per current Building Regulation;

  • It is not compulsory to connect the air intake of the stove directly with the outside but at least 50 m3/h of air must be guaranteed;
  • The stove must be placed in a position that receives the necessary level of air for correct combustion of the pellets (at least 50 m³/h must be available),or in accordance with current Building regulations Part J;
  • Combustion air cannot be obtained from a garage or from an area without ventilation or exchange of air, but from a free or external space.
  • The stove must not be installed in a bedroom, bathroom or shower, or where there is already another heating appliance without an autonomous air flow;
  • The stove must be connected to a chimney or flue – internal or external vertical pipe - in compliance with current Buildings Regulations Part J.
  • Use of a mesh at the end of the exhaust pipe is absolutely forbidden as this could cause the poor functioning of the stove;
  • Flue joints with silicone gaskets must always be used to guarantee the seal of the exhaust pipes;
  • The installation cannot be installed in a shared flue;
  • Carbon Monoxide detector must be fitted.

Stove Installation in a Airtight Home:

When using a pellet stove in an airtight or well-insulated house with mechanical ventilation, it's important to consider the need for proper ventilation and combustion air supply. Airtight houses can potentially create an issue because they don't allow for natural air infiltration, which can affect the stove's combustion process.

To address this, you should ensure the following:

  • Combustion Air Supply: An airtight house will require a dedicated external air supply for the pellet stove to ensure proper combustion. This prevents the stove from competing with the home's ventilation system for indoor air, which could lead to inefficient burning or safety concerns.
  • Ventilation: Mechanical ventilation systems, like heat recovery ventilators (HRVs) or energy recovery ventilators (ERVs), help maintain indoor air quality in tightly sealed homes. Ensure that the stove's exhaust does not interfere with these systems, as it should be safely vented to the outside.
  • Professional Installation: It's crucial to have the pellet stove professionally installed and to follow the manufacturer's guidelines for air supply and ventilation. Certified installers are familiar with the specific requirements of your stove model and can ensure it operates safely and efficiently.
  • Regular Maintenance: Keep the stove well-maintained, including cleaning the exhaust and air intake systems. Proper maintenance helps maintain efficiency and safety.

By addressing these considerations and ensuring that the pellet stove is installed correctly, you can safely and effectively use it in an airtight house with mechanical ventilation.

What is a hermetically sealed pellet stove:
A hermetically sealed pellet stove is designed to operate independently of indoor air, creating a closed combustion system. This means that it draws its combustion air directly from the outside and exhausts the combustion gases back to the outside. In a hermetically sealed pellet stove:

  • Combustion Air: Instead of relying on indoor air, which can be an issue in tightly sealed or well-insulated homes, the stove has a dedicated external air intake. This helps prevent the stove from affecting the indoor air quality and ensures it operates efficiently.
  • Sealed Combustion Chamber: The stove is constructed to have a sealed combustion chamber, separating the combustion process from the interior of the home. This design minimizes any potential impact on indoor air pressure and quality.
  •  Safety and Efficiency: Hermetically sealed pellet stoves are often appreciated for their safety and efficiency, as they reduce the risk of backdrafts and ensure consistent combustion performance.
  • Professional Installation: Proper installation by a certified technician is essential to ensure the hermetically sealed pellet stove operates as intended and complies with safety standards.

These stoves are well-suited for homes with stringent requirements for indoor air quality, energy efficiency, and safety. They are designed to provide clean and controlled heating without affecting the airtightness of the home.

The stove must be installed and assembled by qualified personnel. The warranty on the stove is dependant on correct installation. 

Download: Part J Buildings Regulations 2014

Flue Installation Examples