Heat pump in a bungalow; the underrated retrofit

Before any kit conversation, the building tells you what is possible. A bungalow typically presents single-storey, large roof area for solar. Most also carry generous loft for insulation upgrades. These facts shape every later decision about comfort.

The most common issue this property surfaces is bedroom overheating, followed by cold rooms. Any sensible plan addresses those first.

The constraint is acoustic, not thermal. Outdoor units in bungalows often end up close to a bedroom window because the sensible side wall is also where someone sleeps. The unit itself is rarely the problem; the problem is reflective surfaces such as a fence and a paved patio amplifying what would otherwise be a forgettable hum.

Position the outdoor unit on a wall that does not face soft furnishings on the inside or a flat reflective surface outside. Where neither side wall is ideal, an extended pipe run to the gable can recover the situation, and the additional cost is modest compared with replacing a poorly placed unit later.

Insulate the loft to 400 mm rather than stop at the regulatory minimum. The marginal cost is small, the headroom is rarely needed, and the heat-loss figure falls enough to drop the heat pump down a size in many cases.

The published cost range for this work lives in the cost registry, not on this page. The scope it covers is air-source heat pump, 7 kw, fully installed in a typical uk property.

Bungalows tend to be undersold in the retrofit conversation because they sit outside the postcard image of either a Georgian terrace or a new-build estate. They should not be. The plumbing is short, the insulation is straightforward and the homeowner is usually the one who notices the difference in everyday comfort first, often within the first cold week.