Our services
Notified and Accredited Testing Laboratory
Kontrol 94 Ltd. is a notified and accredited testing laboratory specializing in the testing of domestic solid‑fuel appliances – room‑heating appliances, inset appliances and fireplaces, cookers, pellet appliances, boilers, and other products within the scope of the applicable standards.
The laboratory performs thermal performance, emission, and safety testing in accordance with the relevant standards and regulatory requirements. Our company works with both Bulgarian and international manufacturers and support the preparation of the required technical documentation within the laboratory’s scope of competence.
Services
Assessment of the Performance Characteristics of Construction Products
Kontrol 94 Ltd. is a Notified Body NB 1879 in the European Commission’s registry and holds authorization CPR 12–NB 1879 (issued on 09.10.2013) for performing assessment of the performance characteristics of construction products. Within its notified scope, the laboratory conducts testing and assessment of solid‑fuel appliances in accordance with the applicable standards from the EN 16510 series.
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BDS EN 16510‑1:2023
Residential solid fuel burning appliances – Part 1: General requirements and test methods
- BDS EN 16510-2-1:2023
Residential solid fuel burning appliances – Part 2‑1: Roomheaters
- BDS EN 16510-2-2:2023
Residential solid fuel burning appliances – Part 2‑2: Inset appliances including open fires
- BDS EN 16510-2-3:2022
Residential solid fuel burning appliances – Part 2‑3: Cookers
- BDS EN 16510-2-6:2023
Residential solid fuel burning appliances – Part 2‑6: Mechanically by wood pellets fed roomheaters, inset appliances and cookers
- BDS EN 16510-2-10:2025
Residential solid fuel burning appliances – Part 2‑10: Multi‑firing sauna stoves fired by natural wood logs
Testing of Solid‑Fuel Appliances under Accreditation
The testing laboratory of Kontrol 94 Ltd. is accredited by the Executive Agency “Bulgarian Accreditation Service” in accordance with BDS EN ISO/IEC 17025:2018. The current certificate No. 122 LI was issued on 19.06.2026 and is valid until 29.01.2029.
- BDS EN 16510-1:2023
Residential solid fuel burning appliances – Part 1: General requirements and test methods
- BDS EN 16510-2-1:2023
Residential solid fuel burning appliances – Part 2‑1: Roomheaters
- BDS EN 16510-2-2:2023
Residential solid fuel burning appliances – Part 2‑2: Inset appliances including open fires
- BDS EN 16510-2-3:2022
Residential solid fuel burning appliances – Part 2‑3: Cookers
- BDS EN 16510-2-6:2023
Residential solid fuel burning appliances – Part 2‑6: Mechanically by wood pellets fed roomheaters, inset appliances and cookers
- BDS EN 16510-2-10:2025
Residential solid fuel burning appliances – Part 2‑10: Multi‑firing sauna stoves fired by natural wood logs
- BDS EN 303-5:2021+A1:2022
Heating boilers - Part 5: Heating boilers for solid fuels, manually and automatically stoked, nominal heat output of up to 500 kW - Terminology, requirements, testing and marking
The laboratory maintains a flexible scope of accreditation, allowing the application of new versions of the included standards or of standards that replace them, in accordance with the applicable rules. The current list of standards and their dated versions is maintained by the laboratory.
Gas Products
The company performs testing of gas appliances in accordance with the applicable standards within its scope of competence.
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BDS EN 26:2024
Gas-fired instantaneous water heaters for the production of domestic hot water
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BDS EN 30-1-1:2021+A1:2024
Domestic cooking appliances burning gas - Part 1-1: Safety - General
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BDS EN 30-1-2:2023
Domestic cooking appliances burning gas - Part 1-2: Safety - Appliances having forced-convection ovens
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BDS EN 30-1-3:2004+A1:2007
Domestic cooking appliances burning gas - Part 1-3: Safety - Appliances having a glass ceramic hotplate
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BDS EN 30-1-4:2026
Domestic cooking appliances burning gas - Part 1-4: Safety - Appliances having one or more burners with an automatic burner control system
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BDS EN 30-2-1:2025
Domestic cooking appliances burning gas - Part 2-1: Rational use of energy - General
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BDS EN 30-2-2:2025
Domestic cooking appliances burning gas - Part 2-2: Rational use of energy - Appliances having forced-convection ovens and/or grills
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BDS EN 89:2015
Gas-fired storage water heaters for the production of domestic hot water
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BDS EN 125:2022
Flame supervision devices for gas burning appliances - Thermoelectric flame supervision devices
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BDS EN 126:2025
Safety and control devices for burners and appliances burning gaseous fuels - Multifunctional controls
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BDS EN 203-1:2021+A1:2024
Gas heated catering equipment - Part 1: General safety requirements
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BDS EN 416:2019
Gas-fired overhead radiant tube heaters and radiant tube heater systems for non-domestic use - Safety and energy efficiency
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BDS EN 419:2019
Gas-fired overhead luminous radiant heaters for non-domestic use - Safety and energy efficiency
- BDS EN 437:2021
Test gases - Test pressures - Appliance categories
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BDS EN 449:2002+A1:2008
Specification for dedicated liquefied petroleum gas appliances - Domestic flueless space heaters (including diffusive catalytic combustion heaters)
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BDS EN 461:2000/A1:2006
Specification for dedicated liquefied petroleum gas appliances - Flueless non-domestic space heaters not exceeding 10 kW
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BDS EN 484:2019/AC:2020
Specification for dedicated liquefied petroleum gas appliances - Independent stoves, including those incorporating a grill for outdoor use
- BDS EN 497:2022
Specification for dedicated liquefied petroleum gas appliances - Multi purpose boiling burners for outdoor use - Cooking vessels with a diameter greater than 300 mm
- BDS EN 498:2012
Specification for dedicated liquefied petroleum gas appliances - Barbecues for outdoor use contact grills included
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BDS EN 521:2019+AC:2019
Specifications for dedicated liquefied petroleum gas appliances - Portable vapour pressure liquefied petroleum gas appliances
- BDS EN 613:2022
Independent closed-fronted gas-fired type B11, type C11, type C31 and type C91 heaters
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BDS EN 1106:2022+A1:2024
Manually operated taps for gas burning appliances
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BDS EN 1596:2001/A1:2006
Specification for dedicated liquefied petroleum gas appliances - Mobile and portable non-domestic forced convection direct fired air heaters
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BDS EN 15502-1:2022/AC:2023
Gas-fired heating boilers - Part 1: General requirements and tests
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BDS EN 15502-2-1:2022+A1:2023/AC:2025
Gas-fired central heating boilers - Part 2-1: Specific standard for type C appliances and type B2, B3 and B5 appliances of a nominal heat input not exceeding 1 000 kW
- BDS EN 15502-2-2:2024
Gas-fired central heating boilers - Part 2-2: Specific standard for type B1 appliances
- BDS EN 16129:2013
Pressure regulators, automatic change-over devices, having a maximum regulated pressure of 4 bar, with a maximum capacity of 150 kg/h, associated safety devices and adaptors for butane, propane, and their mixtures
Other products
We also perform testing of other products in accordance with the applicable standards, including:
- BDS EN 1860-1:2025
Appliances, solid fuels and firelighters for barbecues – Part 1: Barbecues burning solid fuels – Requirements and test methods
Testing and Assessment of Performance Characteristics
The laboratory performs thermal performance, emission, and safety testing to determine the technical and operational characteristics of combustion appliances. Preliminary tests are also carried out, as well as testing for the purposes of ongoing and production control.
Fire Safety
Determination of the safe distances from the appliance to combustible materials.
Combustion Gas Emissions
Determination of the content of oxygen (O₂), carbon dioxide (CO₂), carbon monoxide (CO), nitrogen oxides (NOₓ), organic gases, and dust in the flue gases.
Hazardous Substances
Determination of indicators related to the release of hazardous substances, where applicable.
Temperature Characteristics
Determination of surface temperatures of control and operating elements, as well as the temperature of the flue gases.
Maximum Operating Pressure
Determination of the maximum operating pressure of the water heater, where applicable.
Thermal Output
Determination of the total heat output, the heat output to the water heater, and the space heat output.
Energy Efficiency
Determination of the efficiency of the appliance.
Mass Flow of Flue Gases
Determination of the mass flow of flue gases, expressed in g/s.