BS 5258-13:1986

Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
3. Classification of appliances
4. General requirements
5. General conditions of test
Section two. Safety requirements and associated
methods of test
6. General design and construction
7. Soundness
8. Heat input
9. Combustion
10 Ignition
11. Ignition system
12. Flame stability
13. Sooting
14. Flue system
15. Fire hazard and limiting temperatures
16. Cyclic operation test
17. Manual controls
18. Automatic controls
19. Electrical safety
20. User's instructions
21. Installation and servicing
Appendices
A. Calculation of flue draught
B. Recommended method for determination of soundness
    of combustion system
C. Calculation of reference gas heat input
D. Apparatus and conditions for combustion tests on
    type C1 appliances
E. Apparatus for combustion tests on type C2 appliances
Figures
1. Fan-powered type B appliances with draught diverter
2. Fan-powered type B appliances without draught
    diverter or other type of flue break
3. Type B appliances with integral fan in the secondary
    flue
4. Fan-powered type C1 appliances
5. Bubble leak indicator
6. Apparatus for measuring floor and wall temperatures
7. Test shelf
8. Diagram of taps
9. Test installations
10. Typical test apparatus for type C1 appliances
11. Apparatus for testing type C2 appliances

Requirements and associated test methods for flued natural draught and fan-powered heaters of input rating not exceeding 25 kW and burning 1st, 2nd and 3rd family gases.