Vallox 245 MV heat recovery ventilation unit

245 MV description

Vallox 245 MV is a heat-recovery ventilation unit (HRV) that continuously supplies fresh air throughout the building while recovering heat from the exhaust air. Vallox is a Finnish manufacturer known for powerful yet quiet AHUs. The 245 MV model is designed specifically for very large private houses and smaller commercial buildings, where both energy savings and quiet operation matter.

How Vallox 245 MV works

The unit draws fresh air from outside while simultaneously extracting stale air from the rooms. A plate 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

Vallox 245 MV suits objects of up to 320 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 Vallox 245 MV

Vallox is well known on the Estonian market for quality, durability and long-term spare-parts availability. 245 MV 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.

245 MV technical specifications

Who is Vallox 245 MV for?

Well suited for properties with up to 320 m² of living space.

• Large private house 220–320 m²
• Two-storey house with sauna + cellar
• Smaller office space
• Summer house for year-round use

Frequently asked questions