Paragraph 13 I1 United Kingdom Measures relating to efficiency requirements for new hot-water boilers fired with liquid or gaseous fuels M1. Annotations Marginal citations M1 S.I. 1992/1711. Commencement I1 Sch. para. 13 in force at 22.3.2019, see reg. 1 ← Paragraph 12 Paragraph 13 Paragraph 14 →