Zehnder ComfoAir Q 350 ERV heat recovery ventilation unit

ComfoAir Q 350 ERV description

Zehnder ComfoAir Q 350 ERV is a heat-recovery ventilation unit (HRV) that continuously supplies fresh air throughout the building while recovering heat from the exhaust air. Zehnder is a Swiss / German manufacturer known for the market's highest heat recovery (up to 95%) and its enthalpy exchanger. The ComfoAir Q 350 ERV model is designed specifically for quality-conscious private houses and passive houses, where both energy savings and quiet operation matter.

How Zehnder ComfoAir Q 350 ERV works

The unit draws fresh air from outside while simultaneously extracting stale air from the rooms. An enthalpy (ERV) heat exchanger transfers heat from the exhaust air to the incoming fresh air without the two streams mixing. The result is fresh, filtered supply air that in winter arrives at almost room temperature. This significantly reduces heating costs — often 30–50% compared to natural ventilation.

Energy efficiency and indoor climate

Zehnder ComfoAir Q 350 ERV suits objects of up to 180 m² and is designed to deliver the highest possible heat recovery. Supply air is filtered — typically with an F7 or better filter — which stops pollen, dust and fine particles (PM2.5). It is especially valued by allergy sufferers and families with young children. Filtered air keeps indoor CO₂ levels low, reduces moisture in bathrooms and kitchens, and prevents mould.

Control and automation

The ComfoControl touch panel is simple and intuitive. Supports WiFi and KNX. This means the unit runs only as much as needed — saving electricity and extending filter life.

Why choose Zehnder ComfoAir Q 350 ERV

Zehnder is well known on the Estonian market for quality, durability and long-term spare-parts availability. ComfoAir Q 350 ERV is a popular choice thanks to its strong price-to-performance ratio and easy maintenance. We sell the unit together with professional installation across Estonia, including design, ductwork, commissioning, balancing and ongoing service and filter changes.

ComfoAir Q 350 ERV technical specifications

Who is Zehnder ComfoAir Q 350 ERV for?

Well suited for properties with up to 180 m² of living space.

• Premium private house 120–180 m²
• Passive house or near-zero-energy building
• Installation near bedrooms (quiet)
• Allergy-friendly home

Frequently asked questions