Wood Chip boilers

Wood chip boilers function much like fossil fuel boilers. When heat is required, they will automatically ignite, feed fuel to the fire, and switch off. Their automated nature make them an excellent alternative for those looking for a more cost effective and environmental friendly alternative to traditional oil, LPG, or electrical heating, whilst maintaining the highest comfort levels. Wood chip boilers are generally more suitable for larger domestic and commercial applications where the additional fuel savings compensate for the slightly higher capital cost and greater space and input required for fuel storage. Some models designed for wood chip can also burn wood pellets.

 

Benefits of a chip burning boiler;

  • Fully automatic control and feed systems
  • Automatic ignition and cleaning
  • Option of automatic weather compensation
  • Eligible for both the Domestic and Non- Domestic Renewable Heat Incentive Schemes
  • Wood chips offer an automated heating solution at a lower cost than wood pellets
  • Can utilise own/local woodland to provide fuel
  • Significant fuel savings over oil, LPG and electricity
  • Lambda controllers ensure high real-life efficiencies up to 93%
  • Designed for long operational life

Smaller domestic properties and light commercial installations

Compact 35-45-50-65-80 range

Commercially engineered wood chip boiler sized for domestic and commercial applications.
As a guide the Compact 25-80 range of chip boilers might suit:

Compact 35-45

Well insulated 4-6 bedroom house with larger than average hot water demand and/or swimming pool. Small to medium commercial application.

Compact 45-50

Medium to large country property or large urban house. Small school or rest home, manufacturing process with heat requirement or space heating.

Compact 65

Medium to large country property or large urban house. Small school, rest space heating.

Compact 80

Large country property or large urban house. Medium rural primary school, rest home, manufacturing process with heat requirement or space heating.

 

 

Larger domestic properties and commercial installations

Compact 100-115-150-200 range

Commercially constructed wood chip boiler for heavy load applications with continuous long operation periods or regular stop and start applications.
For nominal work loads of 2,000 hours per year.

As a guide the Compact 100-200 range of wood chip boilers might suit: Large country or urban houses. Medium to large hotels, rest homes and medical care.
Large shop or showroom properties, such as supermarket, shopping centres and out of town stores.

Process applications such as wood fuel drying, food, animal, chicken production.

M Series 300-350-400-500 range

Industrially designed and built wood chip boiler for heavy work loads with nominal working hours of 4,000 hours per year.
As a guide the M Series range of wood chip boilers might suit:
Schools, large country estates, medium to larger hotels, larger rest homes and medical care establishments.

Larger shopping centres or showroom properties, car, supermarket, shopping centres and out of town stores.
Process applications such as wood fuel drying, food, animal, chicken production.

District heating of housing estates, industrial complexes.

Combustion Control

Wood chip boilers require automatic combustion control to adjust to the varying nature of wood chip as a fuel. The most advanced and efficient boilers encompass a lambda sensor to adjust the primary and secondary air for the highest possible efficiencies. The controller ensures the precise mix of fuel, primary air, and secondary air at all stages of combustion to ensure efficiencies of up to 93%.

Fuel Storage

Wood chip boilers require larger fuel stores than the equivalent sized wood pellet system. Fuel stores should be sized so as to allow the boiler to run for a minimum of approximately 4 weeks in the coldest weather without the need to replenish the store. A number of methods can be used to fill the fuel store and are dependent upon individual sites and equipment available.

Chip Boilers

The HDG Compact and M Series range of wood chip boilers - modern, highly efficient, clean burning and totally automatic. Suitable for large domestic, commercial and industrial applications, these boilers from HDG are renowned for being the highest quality, most robust and dependable boilers on the market.

Buffer Tanks/Thermal Stores

Buffer tanks, or thermal stores, are crucial for the efficient operation of all biomass boilers where the heat demand of property can drop below the minimum output of the boiler (typically 30%). Very few properties can guarantee a base load in excess of 30% and therefore buffer tanks should be used to avoid boiler cycling, decreased efficiency, increased electrical consumption, and increased maintenance intervals this causes.