Green technology - Energy savings

Bentech retractable glass roof Green technology Energy saving

Bentech retractable glass roof – a cold winter night. The darker color the colder and better insulated area. The image shows the good insulation of the Bentech Retractable glass roof.

If you have chosen to install a glass roof for environmental or other reasons, Bentech retractable glass roofs offer the following energy-saving solutions and advantages:

A.  Hot climates  

Outdoor air temperatures from 32 to 45 °C/90 to 113 °F:

A well-insulated closed roof in combination with cooled indoor air during the daytime.
Open roof at night.
Reduced use of energy.

Outdoor air temperatures from 15 to 32 °C/59 to 90 °F:

The roof is opened, to let the outdoor air in.
The outdoor temperature the same as the indoor temperature during the daytime.
The roof is closed, as required, at night.
No use of energy.

Outdoor air temperatures from 5 to 15 °C/41 to 59 °F:

The roof is kept closed. Solar heat during the daytime heats the indoor air. 
If the indoor air temperature exceeds the comfort level, the roof can be opened temporarily.
Very limited or no use of energy.

B.  Cold climates:   

Outdoor air temperatures from ‒ 30 to + 10 °C/‒ 22 to + 50 °F:

The roof offers good heat insulation.
Profiles of composite materials are not cold and provide warm surfaces, like wood     
Heat from solar radiation provides increased comfort – less need raise the indoor temperature to compensate for low outdoor temperatures.
During the daytime, the roof functions as a passive solar collector, heating the indoor air.
Lower level of energy use compared to traditional glass roofs.

Outdoor air temperatures from + 11 to + 25 °C/52 to 77 °F:

If the indoor air temperature exceeds the comfort level, the roof can be opened temporarily.
The roof is otherwise kept closed and functions as a passive solar collector, heating the indoor air.
No use of energy.

Outdoor air temperatures from + 26 to + 32 °C/79 to 90 °F:

The roof can be kept open, letting the outdoor air enter the building. This will often provide a suitable indoor air temperature at night and during parts of the day.
If the indoor temperature becomes too high, the roof can be closed and the comfort cooling system switched on.
Significantly lower use of energy.