Understanding the basics MVHR. Heat Recovery and Ventilation

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1 Understanding the basics MVHR Heat Recovery and Ventilation

2 To improve your understanding of the MVHR technology What is Mechanical Ventilation and Heat Recovery (MVHR)? It is a centralised fan system that extracts moist wet air from bathrooms, kitchens, WC & cloakrooms. The moist air that is extracted passes over a heat exchanger, which then pre-heats the fresh air that comes into the supply valves and rooms such as bedrooms and living areas. This means the energy is recirculated and reduces energy usage, saving on heating bills. The Heat recovery unit (HRU) has 2 fans and a single heat exchanger. This system The Heat recovery unit supplied on this site are the Mercedes Benz of the MVHR world. These units are used in top end developments, where reliability and low noise is key. The system is fully automated and will run at low rate on a continuous basis. The system is designed to boost automatically when the level of humidity rises. Why use it? This system is used extensively in Germany and properties with low energy design. It means the building can be wrapped up and very air tight with minimum energy use. The glazing doesn t need trickle vents which reduces heat loss and draughts. It increase the amount of air extracted over a longer period to guarantee that the stale air is removed. It provides automatic summer bypass to reduce overheating. Noise There is some fan noise and this has to be below building regulations level of 30dB in bedrooms. The system is designed to minimise air noise in bedrooms. When the system is in boost (10%) there is a slight increase in fan speed and noise.

3 To living areas From bathrooms and the kitchen

4 How does it compare with a normal extract/fan systems? The heat recovery system runs continuously at a lower rate. Rather than sprinting to extract the stale air as with a conventional extract system the HRU will remove more stale air but over a longer period. This means that to the eye it might appear that there is more steam present but within a short period this will clear, and will be more effective and clearing all the moisture. Key points 1. Reduces energy use in the house by up to 15% 2. Reduces stale air and contaminants which can effect health 3. Provides fresh air that is filtered through the HRU 4. Cutting edge design 5. It provides summer bypass which will assist in reducing the air temperature and cooling effect. Maintenance The machine has an automatic filter warning detector so will come up on the display if there is a problem. We suggest that the filters are checked every 6 months and can be cleaned using a vacuum. If the filters are damaged or worn then replacements are available. Kitchen filters are available to remove contaminants in the air. Warranty period All MVHR system and controls have a guarantee and warranty period for 2 year period The Heat recovery system is designed to run continually, replacement parts are available. With only 2 moving parts the unit is very simple and robust. Any issues relating to warranty please contact David Wilson Homes.

5 Saves energy Security Low noise levels Better air quality The transfer of energy from the outgoing stale humid air to the incoming fresh air reduces the need for the heating system to re-heat the air. This saves energy and lowers the running costs of the heating system. Fresh air can be introduced and humidity levels controlled without the need to open windows and compromise security. Extractor fans in bathrooms can be noisy. An MVHR system is much quieter as the fans in a Heat Recovery Unit are placed centrally, in an insulated box and usually away from the living space. The air quality is improved by removing stale damp air from bathrooms and introducing filtered fresh air in living areas.

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7 OMNIE takes control of your home, improving your health, well-being and lifestyle. OMNIE products work together to improve your health and well-being, creating a comfortable and healthy living space, whilst also helping the environment and reducing the running costs of your home. The complimentary heating and ventilation technologies integrate into a single whole house system with controls that manage all the technologies together in a simple intuitive way. More comfortable living Improved health and well-being Complete design freedom More energy efficient Environmentally friendly Having a living space that is at the right temperature is essential for a comfortable environment. An OMNIE system makes sure you have full control over your environment without the need to constantly change settings or put up with rooms that are either too hot or too cold. Quite simply, an OMNIE system uses technology that improves your health and well-being at home. Filtered fresh air, free from pollutants, combined with warm radiant heat, gives you the environment you need. OMNIE systems are unobtrusive in creating the perfect room comfort conditions. Our underfloor heating systems remove the need for steel panel radiators giving you more freedom to do what you want within the room. A comfortable, healthy environment won t cost more to run. An OMNIE system uses renewable technologies and energy efficient systems to produce effective heating that doesn t compromise the comfort you expect to have. From recovering heat in the ventilation system to absorbing energy from the ground, OMNIE s whole house system uses low-carbon technologies ensuring cleaner energy for your home and less impact on the environment.

8 OMNIE 18 Apple Lane Trade City Sidmouth Road Exeter, Devon EX2 5GL W