Arrived at site in time to see the heat recovery system being put in. It looks like a giant red snake in the ceiling! It's purpose though is much less sinister. This is a really clever piece of kit.

A heat recovery ventilation system works by extracting moist and stale air from wet rooms in your home, it recovers the usually lost heat from the extracted air. It also supplies clean, filtered fresh air that is heated from the recovered warmth of the extracted heat.

A heat recovery system is beneficial as everyone wants their house to be as airtight as possible to get the most out of their heating, however, this can cause poor air quality due there being no sources of natural ventilation. Having an airtight building with and no ventilation leading to poor indoor air quality can significantly increase the effects of asthma and other respiratory problems. Other issues that can be caused as a result of poor indoor air quality are condensation, mould, dust mites, unpleasant smells and the build-up of toxic gases.
If you install a heat recovery system it will extract the moist, stale air from all the wet rooms in your house and replace it with clean, filtered, fresh, warm air to all your habitable rooms and bedrooms without letting the heat escape. Your home will be fully ventilated throughout the year with as much as 95% of the normally wasted heat being recovered providing you with substantial energy savings. Having a heat recovery system installed allows your property to stay air tight with no window vents or bathroom extractor fans required, this creates a healthier, cleaner and quieter environment.

All windows and doors are now in and work has begun to hand pick cobbles for the exterior walling.