This document is applicable to gas-fired appliances producing domestic hot water. It applies to condensing combination boilers with passive flue heat recovery device (PFHRD) that have:
a heat input not exceeding 400 kW,
a hot water storage tank capacity (if any) not exceeding 2000 l,
a declared load profile between M to 4XL.
In the case of combination boilers, with or without storage tank, domestic hot water production is integrated or coupled, the whole being marketed as a single unit.
For this standard, some tests and calculation results of EN 13203‑2:2018 are used to calculate the energy consumptions.
