





Zehnder 471233400 ComfoAir 350, Left Handed Mechanical Ventilation Unit With Heat Recovery MVHR
471233400
ComfoAir 350 LH MVHR Unit – Passive House Certified Ventilation with 96.4% Efficiency & Flexible Duct Configuration
The ComfoAir 350 LH is a high-capacity Mechanical Ventilation with Heat Recovery (MVHR) unit, designed for energy-efficient homes and Passive House projects. With up to 400 m³/h airflow, rotatable spigots for horizontal or vertical ducting, and 96.4% thermal efficiency, it offers advanced comfort and air quality in medium to large residential settings.
- Passive House Certified: Meets rigorous energy performance standards with high heat recovery and airflow capabilities for low-energy buildings.
- 96.4% Thermal Efficiency: Delivers consistent heat recovery and low energy use, supporting sustainable home ventilation.
- Flexible Ducting with Rotatable Spigots: Enables horizontal or vertical connection for versatile installation in varying layouts.
- Filtered Summer Bypass: 100% bypass with filtration maintains fresh airflow without sacrificing efficiency in warmer months.
- Tool-Free Access & Control Options: Easy filter replacement, volt-free boost input, and support for optional ISO ePM1 50% (F7) filters and enthalpy cube for enhanced humidity recovery.
Technical Specification
- Max. Air Volume: 409 m³/h at 100 Pa
- Thermal Efficiency: 96.4% (EPN standard)
- Mounting Type: Wall or floor
- Bypass Function: 100% full and filtered summer bypass
- Power Supply: 230 V, 50 Hz | Amperage: 1.77 A | Power Input: 0.0384 kW
✅ Choose the ComfoAir 350 LH for high-performance, Passive House-ready ventilation with flexible ducting and top-tier energy efficiency.
Range | Zehnder ComfoAir |
Product | Whole House Filtration |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- STANDARD DELIVERY – 2–3 Working Days From Despatch (subject to stock availability) - £4.99 inc-VAT. (£4.16 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.