Insulation jacket

A foam, foil, or fibre wrap fitted around the steam and/or brew boiler to reduce heat loss to the surrounding cabinet. Most are aftermarket retrofits, though some manufacturers fit them as standard.

Why it matters — An insulated boiler holds temperature more stably, recovers faster between shots, and uses less electricity at idle. For a machine that runs all day, that adds up.

Good to know

• Easy to retrofit on most prosumer machines (Rocket, ECM, Profitec) — usually a 30-minute job.
• Don't insulate any boiler with exposed electrical contacts or pressure-stat probes — leave clearance for safety.

Related: Boiler Insulation