MVHR Summer Bypass

The predictably unpredictable UK still brings spells of hot weather – a few days, a few weeks, or even months, - the rising temperatures create uncomfortable hot and bothered people in their homes, and especially during the night time.

The objective of the Summer Bypass is to not worsen the impact of hot weather – continue to ventilate and provide good levels of fresh air, without the heat recovery

It is crucial to understand how a summer bypass works on a unit.  They are all different, so it’s not just about ticking a box and saying the function exists. A summer bypass should help reduce the discomfort caused to occupants by hot weather, and the only way it can do this is by truly bypassing the heat exchanger and taking into consideration not only external conditions, but internal ones to.

The Summer Bypass function is an important factor in helping deliver comfort, especially during the summer months, but remember, the MVHR system is still fundamental to well-being and good indoor air quality in an efficient and highly insulated home.

When looking at how a Summer Bypass works you should consider the following;

• Does it maintain ventilation performance?
• Does it filter supply air effectively?
• Does it just activate and deactivate itself – if so, based on what?
• Is it looking at external conditions only – what about inside the house?