Zehnder ComfoAir 350

Product Part Numbers:

• Left-Handed: CA350L
• Right-Handed: CA350R

Premium MVHR System for Homes up to 200m²

The Zehnder ComfoAir 350 is a high-efficiency Mechanical Ventilation with Heat Recovery (MVHR) unit, designed for floor or wall mounting. Its adjustable spigots provide flexibility in installation, making it ideal for homes up to 200m².

Key Features:

Airflow Rate @100Pa: 350m³/h
88% Heat Recovery Efficiency – Retains heat while ensuring fresh airflow
100% Full & Filtered Modulating Summer Bypass – Optimizes indoor climate year-round
Passive House Approved – Meets rigorous energy efficiency standards
Left or Right-Hand Configuration – Available in both orientations
100% Variable AUX Speed – Supports way mode, medium speed, or purge boost
Volt-Free Contact – Compatible with external controllers
G4 Filtration – Ensures high indoor air quality
Tool-Free Filter Access – Simplifies maintenance
SAP Appendix Q Listed – Certified for superior energy efficiency

Controllability

The Zehnder ComfoAir units have an optional selection of boost switches and room sensors for demand controller ventilation

Inputs

• Volt free contact boost capability.
• 240v switched live capability

Advanced Control Options

Wall Controllers (Optional)

• Comfo Control Basic – 3-position switch for manual ventilation speed adjustment
• Comfo Control Basic LED – Adds system maintenance notifications

Wireless RF Control Option

• RF-PCB Module – Enables use of the CCRFZ (655 000 755) wireless controller without needing a Comfo Sense C67

Smart Room Sensors for Automated Ventilation

Zehnder AQR – Air Quality Sensor
Detects hydrogen, CO, methane, ethanol, isobutane
Auto-triggers high airflow when pollutants are detected
Adjustable overrun timer (2-40 minutes)

Zehnder PIRR – Motion Sensor
Detects movement up to 7m away
Automatically boosts ventilation
Adjustable overrun timer (2-40 minutes)

Zehnder HHR – Humidity Sensor
Activates at 30-90% Relative Humidity
Adjustable overrun timer (2-40 minutes)

Zehnder THR – Temperature Sensor
Activation range (5-35°C)
Fixed 2-minute overrun timer

BMS Control

BMS integration is possible

Installation & Construction

Wall Bracket Included – Simple setup
Optional Floor Stand Available – Extra flexibility for floor mounting
EPP Construction with Plastic Outer Covers – Lightweight yet durable

Motors

Quality EC motors with 100% variable supply and extract motor control

Filtration

2 x G4 filters are fitted to the unit that are easy to replace

Summer By-Pass

The Zehnder range of units have a 100% summer by-Pass

Low Noise Levels

Heat Exchanger

A standard or optional Enthalpy heat exchanger is available

Smart Frost Protection & Orientation

• Frost Protection Programme – Prevents freezing in low temperatures
• Left or Right-Hand Configuration – Check orientation before ordering

Warranty

Zehnder offer a 2-year warranty but can be extended to 6 years by registerable through Zehnder Website within 6 months of purchase (Homeowner registration | Zehnder Group UK)

Approvals

The Zender range units are SAP appendix Q listed

The CA 350 is passive house approved

Accessories

Further Information

Further information is available on the Manufactures website