Heat recovery means that the fresh incoming air is heated by the outgoing waste air, reducing heat loss through ventilation. The heat created in the apartment thus remains inside and fresh air from outside coming in is heated to a pleasant temperature.

Every recovery unit also has an additional electrical heating system which is sufficient for heating a low-energy building with minimum energy consumption.

The powerful air-conditioning system with recovery units will replace at least 10 % of the volume of air in your apartment in one hour. Thus over ten hours the air in your apartment is fully replaced, which has a positive impact on the quality of air in terms of carbon dioxide content, smell, and humidity. The whole system can be regulated and its performance multiplied several-fold.

There are two separately controllable branches in the apartment – one secures air outlet from the kitchen, the other from the rest of the apartment. As such, you can, e.g. increase the removal of kitchen steam while cooking at the same time as leaving ventilation of the remainder of the apartment at a minimum.

You will come to realize the benefits of this system from personal experience. We can say, however, that in general it results in improved user comfort in the apartment, and this system has met only with a positive response from users, mainly for the following reasons:

• Air ventilation is not extreme – you avoid temperature differences and this leads to increased living comfort, and is also appreciated, e.g., by plants sensitive to temperature changes
• The fresh air is preheated by the waste air, significantly reducing heating energy consumption
• The exchange of air can be regulated. At minimum performance, 10 % of the air in your apartment is replaced in an hour, securing a comfortable environment free of dust and humidity with imperceptible ventilation
• The air-conditioning system significantly increases the hygiene comfort of your home – you don’t get condensation on your windows, and you prevent the occurrence of mould
• Air removal from the kitchen – the whole room is ventilated, not just the area above the cooker. You can, of course, also purchase a cooker hood with carbon filter securing partial local filtration of cooking smells.

If these ideas scare you more than anything, don’t worry and keep reading. At basic level, the BLV project only gives you those fixtures you can control, including manually, the way you are used to them, while also allowing you to expand them substantially in accordance with your wishes.

You will have in your apartment:

• control unit
• thermostatic dials on radiators
• smoke detector

Other fixtures you can order and easily connect to the current system include clever dimmers which provide exactly the right amount of light you need and which can respond to when you arrive, and the momentary light situation. You can also easily measure the consumption of all your appliances, set the times they come on at, plus other advanced options. The system can also warn you if any appliance breaks down, and intervene in the event of flooding or fire. Other options for expanding your system include movement and twilight sensors, CO2 sensors, cameras, door magnets and in future also weather stations. The system can also be linked to systems for controlling home audio and video.