A Powrmatic listing, from the manufacturer's published data.

Units: SI · US customary

Published specification

Capacity	15.0 kW
Design air flow	0.42 m³/s
Efficiency	0.91 kW heat per kW input

Manufacturer's product page

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Listed from published data; a listing's figures are the manufacturer's, the model that runs them is ours. Solver results never depend on who has claimed what.