Not necessarily. The design needs to match each room’s heat loss with the radiator output at the proposed water temperature. A larger emitter can provide useful heat at a lower temperature, which can help heat pump efficiency. Ask for the room-by-room schedule and the reason for each proposed replacement, rather than accepting a whole-house assumption.
Join the discussion: Has your quote identified specific rooms needing larger radiators?
Suggested next step: Request a radiator schedule with the heat pump quote.
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