Windhager UK

BioWIN Lite 332

HETAS ID: J52679
App. Type: Independent Boilers
Fuel Type: Wood Pellet
Certificate Ref: AA-2023-10/01
Std. Tested to: EN-303-5:2012
Hearth Req: Constructional
Manufacturer Address: Tormarton Road, Marshfield, Chippenham, South Gloucestershire, SN14 8SR
Manufacturer Email: [email protected]
Telephone Number: 01225 892 211
Hetas Logo Gray


HETAS has audited and verified that all applicable clauses in the test report have been passed in respect of the materials, design, and construction in accordance with the relevant BS EN type test standard for the appropriate technology, performance criteria of which is below;

Net Efficiency - Wood Pellet - Full Load 92.3%
Gross Efficiency - Wood Pellet - Full Load 84.9%
Net Efficiency - Wood Pellet - Part Load 92.3%
Gross Efficiency - Wood Pellet - Part Load 84.5%


In support of reducing the impacts of particulate emissions on the UK's overall air quality targets, HETAS “Cleaner Choice” appliances have been independently verified as exceeding the current requirements for UK smoke control areas for particulate matter, including PM2.5's by 50% of that required by DEFRA;


Improvement on Clean Air Act Particulate Limit – Full Load


Improvement on Clean Air Act Particulate Limit – Part Load


The product certified has been assessed for its suitability for installation in domestic properties against the requirements of the Building Regulations and appropriate standards. The performance of the appliance has been verified as meeting the following technical performance attributes;

Combustible Clearances - Rear PASS mm
Combustible Clearances - Side PASS mm
Hearth Temperature > PASS
Appliance Spigot SIze 130 mm
Minimum Flue Diameter 150 mm
External Air Supply Compatible *No
Tool Required for Refue/De-Ash No
Flue Draught test Point No

*HETAS product approval is not valid for appliances fitted with an external air supply ducted directly to the appliance. The installer should reference HETAS technical note TN_0020 General Guidance for the Installation, Risk Assessment & Commissioning of Solid Fuel Appliances with a Dedicated External Air Supply for more information.

Technical Data

The purpose of this HETAS Stove Approval Scheme is to help consumers, retailers, installers and others to identify stoves with lower particulate (PM) emissions. There are concerns that small particle emissions known as PM2.5 to PM10 can be harmful. For that reason, we are operating a scheme which only accepts appliances that are tested to emit lower emissions compared to the current legal requirements. We have chosen to set the bar for entry at 50% less emissions than required for exemption for use in smoke control areas in the UK. We also note that Ecodesign legislation has differing, but important limits for other emission and any appliances listed here must meet those requirements as well as exceeding the particulate emission values for exemption by at least 50%.

Additionally, the product certified has been assessed for its compliance against the legal requirements for emissions and efficiency stipulated within the Ecodesign regulations. The performance of the appliance has been verified as meeting the following environmental attributes;

PM - Wood Pellet 16 mg/m3
OGC Emissions - Wood Pellet 1 mg/m3
CO Emissions - Wood Pellet 84 mg/m3
NOx Emissions - Wood Pellet 135 mg/m3
Seasonal Efficiency - Wood Pellet 81.6%
Energy Label Ratings A+

Appliance Dimensions

Height 1705mm
Width 1075mm
Depth 780mm

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