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The Green Air Switch (GAS) is relatively simple from a conceptual point of view. Think of your refrigerator. Have you ever walked up to it in bare feet or sandals and felt the heat coming out from below?
The air is cool inside the refrigerator and freezing inside of the freezer. We are simply moving heat from one space to another. We are moving heat out of the refrigerator and into the kitchen area.
The biggest difference between the Green Air Switch (GAS) and a conventional cooling system is that we must create heat in order to cool therefore using a much larger amount of energy with a conventional refrigerator or air conditioner as opposed to GAS.
GAS does not create heat in order to cool and therefore cools much more efficiently than a conventional system. GAS merely exchanges heat with cooling.
So you ask how does this occur? We shall explain in detail below, The Operational Description of GAS explains how a typical day using GAS would go.
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1. at 3pm (Hot outside, mechanical cooling RUNNING, building occupied, $$$ running, RED outside and light BLUE inside)
94 deg outside, 73 deg inside
A) During this time GAS is not pulling in cool outside air to cool the building however the sub cooling portion of GAS may be helping the compressor to save energy when the condenser exhaust air temperature rises above 96 deg.
2. at 6pm (Hot outside, mechanical cooling NOT RUNNING, building un-occupied, RED outside and light RED inside)
96 deg outside, 77 deg inside
A) Everything is shutdown at this time as GAS has occupancy sensing and shuts down all systems when no one is in the building.
3. at 8pm (Warm outside, mechanical cooling NOT RUNNING, building un-occupied, light RED outside and RED inside)
78 deg outside, 82 deg inside
A) Everything is shutdown at this time as GAS has occupancy sensing and shuts down all systems when no one is in the building.
4. at 10pm (Cool outside, mechanical cooling NOT RUNNING, GAS Free Cooling ON, building un-occupied, light BLUE outside and light RED inside)
65 deg outside, 77 deg inside
A) GAS has found an opportunity to use "Free Cooling" to cool the building down.
5. at 7am (Cool outside, mechanical cooling NOT RUNNING, building occupied, BLUE outside and light BLUE inside)
58 deg outside, 70 deg inside
A) All HVAC systems are OFF while the building is in between the heating setpoint (69 deg) and the cooling setpoint (73 deg). Even though the building is occupied there is no HVAC energy being used.
6. at 11am (Cool outside, mechanical cooling NOT RUNNING, GAS Free Cooling ON, building occupied, light BLUE outside and light BLUE inside)
65 deg outside, 70 deg inside
A) GAS will maintain indoor cooling setpoint temperature by using "Free Cooling" with outside ambient temperature to cool the building down. Cool air is brought in and warm air is exhausted out, cooling the building down without the HVAC system running.
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