Part 37Gas-fired steam boiler

Part 37—Gas-fired steam boiler

28 Prescribed activity

(a) decommissioning one or more gas-fired steam boilers each of which was manufactured at least 10 years before the date it is decommissioned; and

(b) installing one or more unlisted products each of which complies with the criteria specified in column 2 of an item in Table 37.1 and—

(i) if the product has a nominal gas consumption exceeding 3700 MJ/h but not exceeding 7500 MJ/h, has an electronic gas/air ratio control system; or

(ii) if the product has a nominal gas consumption exceeding 7500 MJ/h, has an electronic gas/air ratio control system that receives a signal from a flue gas sensor for combustion trim purposes.

Table 37.1—Product categories

| 37A | A new gas-fired steam boiler that is a Type B appliance and meets the specified minimum thermal efficiency requirements. |