Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings

O N L I N E V E R S I O N L1(b), L2 6.3 A gas-fired range cooker with an integral central heating boiler (within a single appliance body) that is either part of a new system or is a replacement component in an existing system should have two independently controlled burners (one for the cooking function, and one for the boiler). NOTE: This paragraph does not apply to appliances with fully independent boiler and cooker parts within a shared case. In this case, the boiler should be treated as a conventional gas-fired boiler. 6.4 If a gas-fired warm air system is installed in an existing dwelling, all of the following should be met. a. The system should be installed in accordance with BS 5864. b. All new or replacement ductwork should be insulated in accordance with BS 5422. c. Where controls are external to the heater, the system should be provided with a time switch/ programmer and room thermostat, or programmable room thermostat. d. Where controls are integrated in the heater, the system should be provided with a time switch/ programmer and room temperature sensor linked to heater firing and fan speed control. e. Independent temperature control of the hot water circuit should be implemented with a cylinder thermostat and a timing device. When there is no demand for hot water both the pump and circulator should switch off. 6.5 A gas-fired fixed independent space heating appliance that is installed in an existing dwelling should meet the applicable standard(s) as follows. a. An appliance for primary space heating should meet standards (i) to (iv) below. i. BS EN 1266 ii. BS 7977-1 iii. BS EN 613 iv. BS EN 13278. b. An appliance for secondary space heating should meet one or more of standards (i) to (vi) below: i. BS EN 1266 ii. BS 7977-1 iii. BS EN 613 iv. BS EN 13278 v. BS EN 14829 vi. BS EN 449. 6.6 If a gas fire is provided as a secondary heat source as part of a combined fire and back boiler unit in an existing system, the standards in BS 7977-2 should be met. 6.7 If a gas-fired fixed decorative fuel-effect fire is installed in an existing dwelling, both of the following should be met. a. The standards in BS EN 509 should be met. b. The number of appliances should not exceed one per 100m2 of dwelling floor area. Building Regulations 2010 Approved Document L Volume 1, 2021 edition 41 O N L I N E V E R S I O N