Prefect Controls have been providing a traditional heat loss calculation service for many years to accurately determine the heating output required for projects it is involved with.
Calculations
The calculations, prepared by professional surveyors, combine the thermal transmittance co-efficient or U-values of all the elements of the external fabric, the volume of spaces, and the ventilation rate. They also consider the construction methods and materials, window and door aperture positioning, type of glazing, dimensions of the room, and the position of each room in the building.
For large projects such as student accommodation, these calculations are critical in optimizing energy requirements across a university’s estate and only those prepared by qualified surveyors should be used.
On-line calculator
To help in the initial stages of planning a project we have developed its own on-line calculator. Prefect use building regulations information of the period when properties were constructed or renovated, This innovation improves the accuracy of the calculations and negates the need to search for hard-to-find detail such as glazing or insulation thicknesses.
The calculator asks for basic site and room information then does the maths and advises the size of the heater required. The on-line calculator is more accurate than many seen on HVAC company websites, but it should be stressed that it is not intended as a replacement for professionally prepared calculations by a qualified surveyor.