RR127 - Measurement and modelling of combustion products from
flueless gas appliances
This is a report on measurements and modelling of the combustion
products emitted from flueless gas appliances. Measurements were
made using a range of such appliances, at varying firing rates, in
a controlled chamber, including "worst case" simulations
that would be experienced in extremely air-tight rooms. Ventilation
in the chamber was either in the form of purpose-provided vents in
the chamber walls, or at controlled air exchange rates via a
mechanical ventilation system. This enabled subsequent prediction
of the likely concentration of combustion products for a range of
ventilation provisions, room sizes and potential uses of the
flueless gas appliances. Concentrations of carbon dioxide
(CO2), carbon monoxide (CO), nitrogen dioxide
(NO2), nitric oxide (NO) and oxygen were monitored,
together with ultrafine particles, aldehydes and fuel usage.
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