17-48 Melfield Gardens

2. Permanent speed switch that sets the ventilation rate to match the number of people living in the home. 3. Opening windows for emergency ventilation if you spill something smelly or are too hot. You also leave windows open overnight to keep you cool. Temporary boost. The righthand switch outside the bathroom and a similar switch in the kitchen are two boost switches for the ventilation. These override the controller and set the speed to the highest ventilation rate. They look like a light switch and should normally be off (top of switch pushed in like photo), but can be switched on temporarily during cooking or showering. Remember to switch them off!

Permanent speed setting. Press mode so the light shows ‘Auto’. Adjust the speed using the plus and minus buttons. Normally you can leave it in medium, so two lights are shown next to the fan symbol like the photo. If you live on your own then you can reduce the speed to one light showing. If the + and – buttons don’t work and lights show speed 3, check that the boost switches are off. The higher rate can be used to clear excess moisture in the air e.g. when cooking or after a hot bath or shower. The lower rate can be used when the home will be left unoccupied for extended periods of time e.g. when residents are on holiday. Your MVHR system has been fitted with a humidity sensor that will automatically increase the speed of the ventilation system when increased moisture is detected i.e. showering or bathing.

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