The following verifications of input data related to heating, ventilation and air conditioning are performed:
- Room air conditioners, if present, are not being used to cool the entire building. Typically room air conditioners service only part of a building.
- Room air conditioners, if present, are not maintaining the same thermostat set point 24 hours per day. Typically room air conditioners are turned off during part of the day. This usage pattern may be modeled in TREAT by entering programmable thermostat with high setback temperature.
- Central air conditioning, if present, is being used to cool all conditioned spaces in the building, which is typical for most of the installations.
- There is a domestic hot water heater in the building. DHW affects heating and cooling load through stand-by losses. Omitting it will also interfere with model/billing calibration, especially if heating/cooling and DHW fuels are the same.
- The domestic hot water heater is located in unconditioned space, which is typical of most buildings. Note that if DHW heater is located in conditioned space, then its stand-by loss will contribute to useful heating of the space.
- There is mechanical ventilation in the building. Residential buildings typically have kitchen or bathroom exhaust fans that are used occasionally. Multifamily buildings often have ventilated common spaces.
- The mechanical ventilation for each space is below 0.5 ACH. Ventilation rate over 0.5 ACH is in excess of typical residential applications.
- If the primary and secondary heat plants are located in different spaces, there will be a warning reminding that both heat plants heat the entire conditioned space. The secondary heat plant is modeled in TREAT as operating only when the capacity of the primary heat plant is not sufficient to satisfy heating load.
- Combustion efficiency for boilers and furnaces should be measured. The annual efficiency entered into TREAT for boilers and furnaces should be below the measured combustion efficiency.