Mechanical Heat Recovery Ventilation


Fresh air or energy savings? With our mechanical heat recovery ventilation appliances you can have both. Regardless of the age or size of your home, we have the right system for you.
With up to 80% of allergy triggers being avoided with special pollen filters, alongside insulation and modern heating technology,mechanical heat recovery ventilation appliances are one of the necessary components in the energy-saving homes of today.

mechanical heat recovery

The main benefits of controlled internal ventilation are:
MVHRMoisture generated from bathing or cooking builds up within your home, especially visible on windows and mirrors. This can be avoided as air is extracted from these "wet rooms, eliminating mould and prolonging the life of the fabric of your home.
MVHRAs fresh filtered air constantly replaces the stale air inside the home, unpleasant odours won't linger around the house from cooking, cleaning, cigarettes, pets or the bathroom.
MVHRDust mites love to breed in moist environments, often causing allergic reactions to the unlucky occupants of the home. A MVHR appliance helps to maintain healthy humidity levels in your home making it less inviting for dust mites. This is a comforting thought when you consider that we spend 70% of our time, at home.
MVHRIn Britain, 30 million people suffer from allergies and 10 million from Asthma. Special filters eliminate pollen and allergens before they enter your home. Our optional electrostatic filter can remove particles down to 0.01 microns, removing car fumes and even many viruses.
MVHRTraditionally we open windows for ventilation. However, in town houses and ground floors, this may not be the safest option for you or your possessions, especially at night.
MVHRA MVHR appliance will contribute to reducing your energy requirements and costsavings will therefore be enjoyed. This is because up to 95% of the heat can be recovered that would otherwise be lost through alternative means of ventilation (opening windows, having trickle-vents in window frames or extractor fans in bathrooms). Waste heat can also be re-used for heating of the air and water.

genvex hrv system

Enjoy peace and quiet, by keeping your windows shut from outside noises. Also, unlike localised extractor fans, the MVHR appliance runs continuously and quietly.
MVHRStale air in your home is constantly replaced with fresh air meaning that the cocktail of chemicals emitted from chipboard, furniture, cleaning agents etc will be removed, creating a much healthier living environment.
MVHROur appliances exceed Part F of the Building Regulations requirements and also, quite importantly, they support Part L too. With up to 95% heat recovery and a 500% enhanced efficiency output available, you can feel sure you're doing your bit for the environment, whatever MVHR appliance you choose.

What is Heat Recovery Ventilation (HRV)?

MVHR Mechanical heat recovery ventilation offer the optimum solution for systematic, energy-saving ventilation of new homes and renovation projects.
MVHR A ventilation appliance is usually mounted in your loft or utility area, connected via ductwork to ceiling terminals. One fan extracts stale warm air through these terminals from your wet rooms (kitchens, bathrooms etc) and takes it to the ventilation appliance to be exhausted outside.
MVHR Meanwhile, another fan draws fresh filtered air from outside and supplies it through ceiling terminals in the habitable rooms of your home (bedrooms, dining rooms, studies, living rooms).
MVHR During this process, a heat exchanger within the appliance transfers up to 95% of the heat from the outgoing stale air to the incoming fresh air.
In warmer months, the heat recovery process can be bypassed to ensure that cooler fresh air enters the home.

What is a Heat Exchanger?

MVHR A heat exchanger consists of several metal plates. Both airflows (fresh air and stale air) pass over these plates, but on different sides. As the airflows are hermetically separated, they do not mix.
The heat is transferred through the plates from the stale warm air, to the cool fresh air side.
The heat exchangers are constructed out of seawater-resistant aluminium for maximum heat exchange and durability.
MVHR Some heat recovery ventilation systems use a CROSS-FLOW heat exchanger, which can only achieve heat recovery efficiencies of up to 75%. As you can see from the diagram, some heat from the stale air is always wasted.
MVHR However, our appliances use COUNTER-CURRENT heat exchangers, which can reach efficiencies of up to 95%. As you can see from the diagram, almost all heat is extracted from the stale air, ensuring you the very best in heat recovery efficiency.


All heat recovery ventilation appliances surpass building regulation requirements. They can also recover up to 95% of the heat that you would otherwise lose through normal ventilation


Mechanical Heat With increasing pressure from Building Regulation Part F (adequate ventilation) and Part L (energy conservation), coupled with continued rises in fuel costs, saving heat whilst having sufficient ventilation in your home is more important than ever.
You & Your Home's Poor Health.
Mechanical Heat Modern, low-energy homes are highly insulated and air-tight. Poorly sealed windows, doors and other gaps are a thing of the past, so our homes can no longer breathe. The resulting rise in humidity increases not only mould growth, but also the dustmite population. Carbon Dioxide (CO2) and other pollutants also build-up; indoor air quality has never been so poor.
For the occupant, this can lead to discomfort, tiredness, headaches and allergic symptoms.
For the property, it leads to building fabric damage, resulting in more expensive decoration costs and perhaps a lower market value.
The Air we Breath in Our Home
Mechanical Heat A cocktail of chemicals is emitted from chipboard and other building fabrics (furniture, carpets, hard floors, curtains, paint, cleaning agents). Add to this germs and micro-organisms and indoor air quality is often worse than the air by a busy road!
In Britain, we spend on average 90% of our time indoors. Continuous, controlled ventilation is therefore paramount within our lives.

Heat Loss

Mechanical Heat To counteract these problems, trickle vents in window frames and individual extractor fans in bathrooms are traditionally used. This creates drafts, cold spots, noise and significant heat loss. Adequate ventilation can contribute to over 50% of the total heat losses in many modern homes. Therefore the potential for being greener and saving on fuel bills, is high.
This diagram represents where heat energy escapes through the building envelope in:
litres of heating oil consumed per m2 each year
The biggest potential saving is evident in traditional forms of ventilation.

MHRV Service & Maintianence Contracts

We like to give our customers choice and that is why we are offering 3 levels of maintenence proctection. Furthermore, if we did not install your system, no problem... We can still help!


  • £40 per quarter

  • Or enjoy peace of mind with one payment of £154 per annum and save 5%.

    • Safety & Performance checks

    • Clean components for optimal efficiency

    • official service certificate on completion

  • Buy Now


  • £68 per quarter

  • Or enjoy peace of mind with one payment of £260 per annum and save 5%.

    • 5% discount on repairs

    • Extra inspection per year

    • plus same as lower level

  • Buy Now


  • £88 per quarter

  • Or enjoy peace of mind with one payment of £336 per annum and save 5%.

    • 10% discount on repairs

    • Priority service incase of breakdown

    • plus same as lower levels

  • Buy Now

If you have any questions feel free to get in touch with us at anytime...

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