Boiler replacement or heat-pump assessment first?

If replacement is not urgent, obtain a heat-pump assessment before choosing another boiler; it reveals heat loss, radiator and space implications without committing you to install.

What does each route actually answer?

A boiler quote answers how to replace the existing heat source and what associated work is included. A heat-pump assessment should calculate room heat losses, examine emitters and controls, identify outdoor and hot-water arrangements, and estimate designed performance. The assessment is the evidence-gathering step; it is not a suitability guarantee.

When should the heat-pump assessment come first?

Arrange it while the current system is still safe and usable if lower-carbon heating is a serious option, or if radiator, insulation or renovation work is already planned. This reduces the risk of making one upgrade that constrains the next. Ask for the design assumptions and proposed flow temperature in writing.

When might a boiler quote remain the immediate route?

Safety, an irreparable failure, property constraints or household priorities can make a conventional replacement investigation more immediate. Even then, compare whole installed scope and controls rather than headline appliance prices. No online service can decide this without the home-specific facts and professional inspection.