This British Standard specifies the installation requirements for gas-fired
overhead radiant heaters and systems for the environmental heating of premises
other than domestic dwellings. This standard only applies to appliances falling
within the scope of the Gas Appliances (Safety) Regulations 1995 [1].
It is applicable to the installation of heaters that are designed to use gases of
group H of the 2nd family (e.g. natural gas), gases of group P of the 3rd family
(e.g. propane) as well as gases of group B of the 3rd family (e.g. butane)
(see BS EN 437+A1).
NOTE 1 This standard does not specifically cover LPG/air for which additional
requirements might be necessary.
It is applicable to the installation of gas-fired overhead luminous radiant heaters
conforming to BS EN 419-1, single burner gas-fired overhead radiant heaters
conforming to BS EN 416-1 and multi-burner gas-fired overhead radiant tube
heater systems conforming to BS EN 777-1, BS EN 777-2, BS EN 777-3 and
BS EN 777-4.
NOTE 2 For the purposes of this standard, installation includes design, inspection
and commissioning. It is recognized that each of these tasks may, at times, be
performed by the same persons.
NOTE 3 The heat inputs and ventilation rates in cm2/kW of heat input given in this
standard are based on the net calorific value.
It is not applicable to the installation of gas-fired overhead radiant heaters and
systems:
a) to which the Gas Appliances (Safety) Regulations 1995 [1] do not apply;
b) that are designed for use in domestic premises;
c) that are supplied with a heated fluid from a separate source; or
d) that are portable or transportable.