BAS EN 1-1:2026

This document is applicable to residential liquid fuel burning appliances intended for space heating. This document specifies requirements relating to the design, manufacture, construction, safety and performance (efficiency and emission) of appliances fired by liquid fuel (hereafter referred to as “appliance(s)”) and provides instructions for them. Furthermore, it also gives provisions for the evaluation of conformity, i.e. initial type testing (ITT) and factory production control (FPC) and marking of these appliances. This document specifies the test methods for the determination of the smoke number, and CO, NOx, and OGC emission test methods. This document does not apply to: - built-in appliances; - appliances equipped with an atomizing burner; - appliances incorporating a boiler or connected to a water system.