Our latest project features a Vaillant aroTHERM plus 5 kW air source heat pump, delivered in collaboration with Heat Geek — and it’s a textbook example of how efficient a heat pump should be run. This system operates on pure weather compensation mode — no on/off cycling, no unnecessary interference — allowing the heat pump to run continuously, learn the property’s heat loss, and naturally optimise itself. By letting the heat pump do what it’s designed to do: ✔️ Ultra-low flow temperatures ✔️ Stable indoor comfort ✔️ Maximum seasonal efficiency ✔️ Significantly reduced running costs This is the gold standard: an open-loop heat pump system driven entirely by weather compensation. Quiet, efficient, responsive, and perfectly matched to the home’s heat demand. When heat loss design, emitter sizing, commissioning, and controls all align, this is the result — low-carbon heating done properly. This is the benchmark we work to on every installation.