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 — 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 — pollen and particulates stay out during warm-night purge — and at 38.6 dB(A) on full boost it's the quietest unit in the EVO family. The integrated condensate fall lets you ceiling-mount without packing or shims.
Four variants 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. Integrated condensate fall — no shimming required. 160 mm internal duct connections, rotatable spigots. Wired by a qualified electrician via the supplied flying lead.
Specifications
| Brand | Zehnder |
| Air flow range | 116–231 m³/h |
| Heat recovery efficiency | 91% max (SAP 2009) / 90% (SAP 2012) |
| Specific Fan Power | 0.5 W/l/s |
| SEC class | A+ |
| Dimensions (L × W × H) | 1160 × 600 × 269 mm |
| Weight | 36 kg |
| Duct connection | 160 mm internal, rotatable |
| Filter grade | ISO Coarse G4 (ISO ePM1 F7 upgrade available) |
| Voltage | 230 V / single-phase / 50 Hz |
| Max power (with / without pre-heater) | 1168 W / 168 W |
| Sound at full speed | 38.6 dB(A) @ 3 m |
| IP rating | IP40 |
| Certification | Passive House certified, BS EN 13141-7:2010 |
| Warranty | 2 Year Manufacturers |
Manuals & guides
Zehnder EVO 3 Product Data Sheet
Delivery & Returns
Our Price Match Promise
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