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Mechanical ventilation with heat recovery (MVHR System)

Our ventilation partners – we’ve teamed up with independent local specialists who offer a wide range of units and services from MVHR, to the ground and air source heat pumps to suit all specifications and budgets.

For more information on the benefits and features of MVHR systems and the optimum size required for your property please contact a member of our team who can send a referral across.

Ventilation Schematic

An Ecologic SIP build system provides a vast improvement in airtightness when compared with more traditional construction methods, therefore careful attention needs to be considered to the ventilation method requirements to create and maintain a healthy living environment and indoor air quality. MVHR systems, in combination with the excellent insulating properties of a SIP structure, greatly improve the energy efficiency and ultimately reduce your carbon footprint (in excess of 90% improved efficiency considering heat loss).

MVHR facts:

  • The average family of four produces up to 18 liters of water vapor every day through normal activities such as bathing, cooking, and even breathing

  • Healthy buildings usually require a full change of air every two hours, when meeting an air permeability level of less than 5m³/m²hr

  • Indoor air can be up to ten times more polluted than outside air

  • They are designed to quietly operate 24×7 continuously circulating fresh filtered air through the structure

  • Tackles unwanted moisture, pollutants, and viruses as well as strong smells from pets and cooking as well as noises from outside

  • Property size will dictate unit power consumption which can average around 30 – 120 Watts on normal running speed and up to around 200 watts on full boost for larger units

  • Typical running costs of a modern single unit range from £40 to £60 per annum, meaning you’ll save on heat energy more than it costs to run

How do they work?

In a typical application, moist, stale air is extracted from wet rooms (kitchens, bathrooms, utility rooms). The air passes through a high-efficiency heat exchanger which utilises the heat from the stale air and transfers it and uplifts the temperature to the incoming fresh air. This pre-warmed drier fresh air is delivered to all other habitable rooms.

Most heat exchanger systems will recover up to 90 – 95% from the heat of the outgoing air, saving energy and money on heating costs. A typical house temperature of 20°C will uplift from incoming temperatures of below zero to give around 18.5°C to habitable rooms. However, summer bypasses ensure a small tempering of the air through the same heat exchanger.

Click on the video link to learn about How MVHR Works

MHVR House Example
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