Zehnder ComfoAir Standard 375 ERV heat recovery ventilation unit

ComfoAir Standard 375 ERV description

Zehnder ComfoAir Standard 375 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 manufacturer known for premium-class indoor-climate solutions and innovative heat exchangers. The ComfoAir Standard 375 ERV model is designed specifically for private houses where dry winter air is a concern, where both energy savings and quiet operation matter.

How Zehnder ComfoAir Standard 375 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. Unlike conventional heat recovery, the enthalpy (ERV) exchanger recovers moisture in addition to heat.

Energy efficiency and indoor climate

Zehnder ComfoAir Standard 375 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

This means the unit runs only as much as needed — saving electricity and extending filter life.

Why choose Zehnder ComfoAir Standard 375 ERV

Zehnder is well known on the Estonian market for quality, durability and long-term spare-parts availability. ComfoAir Standard 375 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 Standard 375 ERV technical specifications

Who is Zehnder ComfoAir Standard 375 ERV for?

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

• House with dry winter air problems
• Family with an allergy sufferer — stable humidity 30–50%
• Renovated wooden house
• Private house 120–180 m²

Frequently asked questions