MVHR installation cost (UK 2026)

MVHR installation cost (UK 2026). The published installed range in 2026 is £5,500 to £11,000 installed for a typical 3-bed (Passivhaus Trust v1.3 Jan 2026). Both ends of that range are stated rather than collapsed to a midpoint, because the spread reflects real differences in scope, access and grant eligibility rather than installer mark-up.

• Unit class: 80 percent recovery vs 90 percent plus.
• Ductwork: chased into walls and floors vs surface-run in service zones.
• Commissioning: a properly commissioned MVHR is the differentiator between the published SCOP and the delivered SCOP.
• Maintenance over a 10-year horizon: filter changes and balancing.

MVHR is only worth installing where airtightness is at or under 3 m³/h.m² at 50 Pa. Below that, the heat recovery does not pay back.