Heating, Ventilating and Air Conditioning (HVAC)

Heating, Ventilating, and Air Conditioning (HVAC) equipment perform heating and/or cooling for residential, commercial or industrial buildings. A properly designed system will monitor environmental parameters such as temperature, humidity, CO2 content, odor and control the flow of air maintaining an optimal environmental comfort and acceptable air quality. Efficiency and cost savings takes place when the system can decide on the air to use; indoor or outdoor; on the basis of the outdoor temperature, indoor required temperature and current indoor environmental condition.

A case scenario.

Suppose the outside air temperature is 10 deg Celsius. Optimal temperature indoors would be 22 deg Celsius. And the current indoor temperature is 15 deg Celsius. In this case it would be efficient if we reuse the indoor air and circulate it to HVAC rather than using the outdoor air. As the system will need less energy to increase the temperature from 15 to 22 rather than from 10 to 22. But if we keep reusing the indoor air, then its CO2 content and odor is bound to increase, so we can program the system to always use a certain percentage of fresh air. So the system will use 10% of fresh outdoor air which will be mixed with the recirculated indoor air and pushed into the HVAC system. This will result in huge amount of energy savings when we consider that once the indoor temperature is maintained at 22, minimum energy will be required from the HVAC to maintain that temperature because of re-circulation. And since we are measuring other environmental parameters such as humidity, CO2, odor; we can also maintain a comfortable and safe environment.