Are they compatible with high-temp (R290) heat pumps?

Yes, cast iron radiators can be combined with high temperature heat pumps, paving the way for easier transitions to green heating solutions for homeowners. A high temperature heat pump will have a different correction factor, known as the Delta T rating. You’ll use this to determine the new BTU requirements for each room, and then you can use this information to determine the size requirement for your radiators.

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