BS 8446:2020 pdf free download – Installation and maintenance of open- flued, non-domestic gas-fired laundry appliances – Specification.
3 Terms and definitions
For the purposes of this British Standard, the following terms and definitions apply.
3.1 2nd family gas
natural gases
3.2 3rd family gas
liquefied petroleum gases (LPG), including compressed propane and butane
3.3 appliance flexible connector
pipe with appropriate connector ends, designed to have a high degree of flexibility to facilitate the connection of a gas appliance to an installation pipe and allow the appliance to be moved a short distance without the need for disconnection
3.4 braid
layer(s) of cylindrically woven wires covering the hose
3.5 commissioning
process carried out to place and/or put a gas-fired appliance into operation NOTE Commissioning is done in accordance with the manufacturer’s specification.
3.6 dilution
mixture of air, products of combustion and lint
3.7 dry cleaner
appliance in which laundry is processed using solvents
NOTE The solvent usually used in dry cleaning is toxic tetrachioroethylene (perchioroethylene), commonly called “perc” or “PERC”
3.8 drying load capacity
maximum weight that a gas-fired laundry appliance is capable of accepting for each load NOTE The drying load capacity is specified by the manufacturer.
3.9 exhaust duct
pipe used to transmit products of combustion and lint, together with the supersaturated warm drying air, to the outside atmosphere
3.10 exhaust products
gaseous mixture of air, water vapour, products of combustion and lint removed as a result of exhaust venting
3.11 exhaust venting
process of removing moist air, including products of combustion and lint, from an appliance in a room or internal space directly to the outside atmosphere
3.12 flexible exhaust connection
final flexible connection for easy fitting and removal of the appliance, suitable for carrying the temperatures of operation and ideally no more than 500 mm
3.13 lint
fluff drawn off laundry fabrics being processed in the appliance
3.14 make-up air
permanent, non-closable air supply, which replaces that used by a laundry appliance during its operation
NOTE The amount of make-up air is specified by the manufacturer.
3.15 open flue system (type B)
flue system that evacuates the products of combustion to the outside air
NOTE The combustion air is drawn directly from the room or space containing the appliance.
3.16 open-flued appliance (type B)
appliance designed to be connected to an open flue system, its combustion air being drawn from the room or space in which it is installed
3.17 rotary ironer
appliance in which textile material is ironed by being passed across a rotating roller through which heated air and products of combustion are forced or induced by mechanical means
3.18 tumble dryer
appliance in which textile material is dried by tumbling in a rotating drum through which heated air and products of combustion are forced or induced by mechanical means
3.19 ventilation
process of supplying fresh air to, and/or removing air, from a room, internal space, compartment or garage.