Heat loss/heat gains calculations can be calculated using a full dynamic thermal model.
These calculations take into account all the information input into the thermal model.
The assessment is a full dynamic assessment taking into account ventilation system gains/losses, dynamic behaviour such as variations in HVAC systems and room set-point temperatures, the effect of thermal mass, changing solar gains during the day, internal gains etc.
Clients receiving information in this format need not carry out any further works to ascertain the system capacity.
However, in certain instances, system capacities may be higher than those normally expected, since the capacity is engineered to address the demand. For example, a room may be designed to achieve a set-point temperature of 19°C. In normal practice, heating systems may be installed to achieve this temperature for the majority of the time – however on a cold January morning it may be at 17°C for the first hour of occupation. We can advise on the effect of reducing system capacities to understand if the resulting thermal environments are acceptable.
Heat loss/heat gains calculations using a full dynamic thermal simulation provide a far more realistic indication of appropriate system sizing and also allow for interrogation into the effect of various HVAC system controls