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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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Updated 2023-12-12