Design data Tab

Setting	Description
Design data	Room design temperatures — The Room temperatures can be specified as Air temperature or Resultant temperature (Resultant = 1/2 Air temperature and 1/2 Mean Radiant temperature). Supply air temperature — Used to compute the required air flow rate to rooms, assuming a central all air system. The supply air temperature must be below the room temperature. Include losses with gains — When the Include losses with gains option is checked, any net heat loss at particular hours for rooms will offset some of the coincident heat gain for other rooms at the same hour. Include external shading — When the Include external shading option is checked, the calculation will check if each window is shaded by external obstructions at each hour of the day. Shaded windows will receive diffuse solar radiation only. Include window fins — The Include window fins option enables consideration of window fins.
Temperature rise	If room temperatures are allowed to rise, the peak sensible cooling load for the room will reduce.
Fresh air loads	A fresh air load can optionally be included in the load calculation. Fresh air will be supplied to all included rooms using one of the following criteria: Air change rate Fresh air requirement per person Fresh air requirement per square metre For all included rooms, and for each hour of the design day, Fresh air introduced locally to rooms affects the room load. Fresh air from the central plant with conditioned air also affects the room load. Conditioned primary air is supplied at the defined Supply temperature, with optional supply Humidity control. Conditioned primary air affects both room loads and central plant loads.
Fixed temperature air	When Include fixed temperature air to rooms is checked, the calculation is performed assuming a potentially infinite supply of heating or cooling air at a fixed temperature. Therefore, the calculated design air flow rate is always able to meet any load or change in load no matter how large or abrupt. In reality air flow rates are limited by duct sizes and fan capacities. Also enables the remaining air flow options Air change, Per person, Per area, and Air temperature.
Outside conditions	Used to vary the maximum outside dry and wet bulb temperatures experienced on the design day by selecting data based on the weather profile being used for the project. Click Re-calculate all to repeat the calculation with the new temperature data selected.

Design data

Room design temperatures — The Room temperatures can be specified as Air temperature or Resultant temperature (Resultant = 1/2 Air temperature and 1/2 Mean Radiant temperature).
Supply air temperature — Used to compute the required air flow rate to rooms, assuming a central all air system. The supply air temperature must be below the room temperature.
Include losses with gains — When the Include losses with gains option is checked, any net heat loss at particular hours for rooms will offset some of the coincident heat gain for other rooms at the same hour.
Include external shading — When the Include external shading option is checked, the calculation will check if each window is shaded by external obstructions at each hour of the day. Shaded windows will receive diffuse solar radiation only.
Include window fins — The Include window fins option enables consideration of window fins.

Temperature rise

If room temperatures are allowed to rise, the peak sensible cooling load for the room will reduce.

Fresh air loads

A fresh air load can optionally be included in the load calculation. Fresh air will be supplied to all included rooms using one of the following criteria:

Air change rate
Fresh air requirement per person
Fresh air requirement per square metre

For all included rooms, and for each hour of the design day, Fresh air introduced locally to rooms affects the room load. Fresh air from the central plant with conditioned air also affects the room load. Conditioned primary air is supplied at the defined Supply temperature, with optional supply Humidity control. Conditioned primary air affects both room loads and central plant loads.

Fixed temperature air

When Include fixed temperature air to rooms is checked, the calculation is performed assuming a potentially infinite supply of heating or cooling air at a fixed temperature. Therefore, the calculated design air flow rate is always able to meet any load or change in load no matter how large or abrupt. In reality air flow rates are limited by duct sizes and fan capacities. Also enables the remaining air flow options Air change, Per person, Per area, and Air temperature.

Outside conditions

Used to vary the maximum outside dry and wet bulb temperatures experienced on the design day by selecting data based on the weather profile being used for the project. Click Re-calculate all to repeat the calculation with the new temperature data selected.