Zehnder EVO 3 Compact Heat Recovery Unit - 471100161
Zehnder EVO 3 Compact Heat Recovery Unit - 471100161
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Delivery and Warranty
Standard UK Mainland Delivery
If you are not in a rush, then we offer standard delivery and your order should be with you between 2-3 working days.
£6.95
Next Working Day Delivery
Place your order before 12pm Monday to Thursday and receive your order the next working day. Orders placed on Friday before 11am will be processed and delivered on Monday. (Excludes Sunday’s and Public Holidays)
£15.95
Nominated Day Delivery
We know sometimes you will need an order on a particular date in the future. Simply select this option at checkout and add what date you would like to receive the order. We will then contact you to confirm the date. If you need to change this order date then please contact us ASAP.
£15.95
Northern Ireland Delivery
We offer a flat fee rate for Northern Ireland orders, and all are 5-7 working day lead times.
£29.95
Scottish Highlands & Islands Delivery
We only offer a flat fee rate for Scottish Highland & Islands orders, and all are 5-7 working day lead times.
£45.95
Channel Islands Delivery
We only offer a flat fee rate for Channel Islands orders, and all are 5-7 working day lead times.
£45.95
Product Details
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Specifications
Product specifications
| Brand | Zehnder |
| Air flow range | 116–231 m³/h |
| Heat recovery efficiency | 91% (SAP 2009) / 90% (SAP 2012) |
| Specific Fan Power | 0.5 W/l/s |
| SEC class | A+ |
| Sound at full speed | 38.6 dB(A) @ 3 m |
| Dimensions (L × W × H) | 1160 × 600 × 269 mm |
| Duct connection | 160 mm internal, rotatable |
| Certification | Passive House certified, BS EN 13141-7:2010 |
| Warranty | 2 Year Manufacturers |
Summary
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- 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.
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.
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What size home is the Zehnder EVO 3 MVHR suitable for?
The EVO 3 is designed for 2–3 bed apartments and small houses, with a commissioned airflow range of 116–231 m³/h. It sits between the EVO 2 (studios and 1–2 bed flats) and the higher-capacity EVO 4 (up to 322 m³/h), making it the efficiency "sweet spot" for homes that don't need maximum flow. If your project is larger or you're unsure on duty, send us the room count and we'll confirm the right unit.
What's the difference between the Zehnder EVO 2, EVO 3 and EVO 4?
All three share the same compact Zehnder EVO platform; the difference is capacity and efficiency. The EVO 2 is the shallowest (210 mm) for the tightest voids and smallest dwellings; the EVO 3 delivers class-leading 91% heat recovery at just 0.5 W/l/s in a 269 mm casing; the EVO 4 uses the same 269 mm casing but pushes up to 322 m³/h for larger homes. Choose the EVO 3 when heat-recovery efficiency and low running cost matter more than peak flow.
Will the Zehnder EVO 3 fit in a standard ceiling void?
Yes — it's just 269 mm deep and has a built-in condensate fall, so it slides into a standard suspended ceiling without packing or shims. The footprint is 1160 × 600 mm and it can be wall- or ceiling-mounted, left- or right-handed, with rotatable 160 mm spigots for flexible duct routing. It weighs 36 kg, so plan fixings accordingly
How much does the Zehnder EVO 3 cost to run, and is it efficient?
It's the lowest-running-cost unit in the EVO family: up to 91% heat recovery (SAP 2009) / 90% (SAP 2012) and a Specific Fan Power of 0.5 W/l/s, with an A+ SEC energy rating. EC motors hold the commissioned flow rate as filters load, so it stays efficient between filter changes and keeps EPC modelling clean. Max power draw is 168 W without the pre-heater.
Which version of the EVO 3 should I choose — standard, pre-heater or enthalpy?
There are four variants: standard; a factory-handed pre-heater version for locations with external temperatures below −10 °C; a mirror-handed pre-heater version; and an enthalpy exchanger version that recovers moisture as well as heat (helpful where winter dryness is a concern). Match the handing to your duct layout, add the pre-heater for cold climates, and choose enthalpy for humidity balance. Tell us your install and we'll confirm the exact model code.
Does the Zehnder EVO 3 meet Building Regulations Part F, and how quiet is it?
Yes — it's certified to BS EN 13141-7:2010 and is Passive House certified, and because the EC motors maintain the commissioned duty it supports Part F compliance between filter changes. It's also the quietest unit in the EVO range at 38.6 dB(A) at full boost (measured at 3 m), so it's suitable for installs near bedrooms. It's supplied with a 2-year manufacturer's warranty and should be wired by a qualified electrician via the supplied flying lead.