Zehnder EVO 3 Compact Heat Recovery Unit - 471100161
Product Description
- Class-leading 91% heat recovery and 0.5 W/l/s Specific Fan Power
- Ultra-compact 269 mm depth — fits a standard suspended ceiling void
- 100% full and filtered automatic summer bypass
- Wall or ceiling mountable, left or right hand
- Rotatable spigots for flexible duct routing
- Tool-free filter access
- Wireless RF control as standard, ModBus/KNX BMS options
- Passive House certified
The Zehnder EVO 3 is the efficiency sweet spot of the EVO range — the same compact 269 mm casing as the EVO 4, but with optimised motors and aerodynamics that deliver up to 91% heat recovery at just 0.5 W/l/s SFP. For 2–3 bed apartments and small houses that don't need the EVO 4's 322 m³/h headroom, the EVO 3 is the lower-running-cost choice.
EC motors hold a constant commissioned flow rate as the filters load, so Part F duty is maintained between filter changes. The summer bypass is fully filtered, keeping pollen and particulates out during warm-night purge, and at 38.6 dB(A) on full boost it is the quietest unit in the EVO family. The integrated condensate fall lets you ceiling-mount without packing or shims.
Four variants are available: standard, factory-handed pre-heater (for external temperatures below −10 °C), mirror-handed pre-heater, and an enthalpy exchanger version that recovers moisture as well as heat.
Suitable for
- 2–3 bed apartments
- Small houses
- New builds
- Retrofit projects where heat-recovery efficiency and running cost matter more than maximum flow rate
Installation
Wall or horizontal ceiling mounting with an integrated condensate fall, so no shimming is required. Duct connections are 160 mm internal with rotatable spigots for flexible routing, and the unit should be wired by a qualified electrician via the supplied flying lead. If you need more airflow for a larger home, see the Zehnder EVO 4; for the shallowest voids and smaller flats, the Zehnder EVO 2 is just 210 mm deep.
Delivery & Returns
Our Price Match Promise
Payment Methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.