Any fireplace designed to burn coal(other than a fireplace fired by pulverised coal) with a heating capacity exceeding 160 megajoules per hour constructed and installed on or after 1st July 1965 and equipped with mechanical stokers or adapted on or after that date for use with such stokers

Any fireplace designed to burn coal (other than a fireplace fired by pulverised coal) with a heating capacity exceeding 150,000 British thermal units per hour constructed and installed on or after 31st December 1956 and equipped with mechanical stokers or adapted on or after that date for use with such stokers

Any fireplace designed to burn coal (other than a fireplace fired by pulverised coal) with a heating capacity exceeding 150,000 British thermal units per hour (Northern Ireland 160MJ) constructed and installed on or after 31st December 1956 (Northern Ireland 1st july 1965) and equipped with mechanical stokers or adapted on or after that date for use with such stokers

Any fireplace (other than a fireplace fired by pulverised fuel) constructed on or after 31st December 1956 (Northern Ireland 1st July 1965) and installed before 28th April 1982 (Northern Ireland 1st September 1970) and equipped with mechanical stokers, or adapted between those dates for use with such stokers

Any fireplace designed to burn coal (other than a fireplace fired by pulverised coal) with a heating capacity exceeding 44kW constructed and installed on or after 1st July 1965 and equipped with mechanical stokers or adapted on or after that date for use with such stokers.