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Hi everyone,

What would be the best way to create a dual fuel heat pump rooftop in Openstudio?

My goal is to switch to natural gas whenever the outside temperature is below a certain threshold. Since it is not possible to control the air loop components availability, I've made two air loops for my zone : one full electric with a DX cooling and DX heating coil and one full gas with a burner.

When I try to control them with the Availability Manager objects (LowTempTurnOff and LowTempTurnOn), it ends up that none of the rooftops are working or when it does the zone temperature doesn't seem to be affected.

Is it because my zone is supplied by two air loops?

Thank you in advance for your help.

Hi everyone,

What would be the best way to create a dual fuel heat pump rooftop in Openstudio?

My goal is to switch to natural gas whenever the outside temperature is below a certain threshold. Since it is not possible to control the air loop components availability, I've made two air loops for my zone : one full electric with a DX cooling and DX heating coil and one full gas with a burner.

When I try to control them with the Availability Manager objects (LowTempTurnOff and LowTempTurnOn), it ends up that none of the rooftops are working or when it does the zone temperature doesn't seem to be affected.

Is it because my zone is supplied by two air loops?

Thank you in advance for your help.

Hi everyone,

What would be the best way to create a dual fuel heat pump rooftop in Openstudio?

My goal is to switch to natural gas whenever the outside temperature is below a certain threshold. Since it is not possible to control the air loop components availability, I've made two air loops for my zone : one full electric with a DX cooling and DX heating coil and one full gas with a burner.

When I try to control them with the Availability Manager objects (LowTempTurnOff and LowTempTurnOn), it ends up that none of the rooftops are working or when it does the zone temperature doesn't seem to be affected.

Is it because my zone is supplied by two air loops?

Thank you in advance for your help.

The IDF file : https://we.tl/t-CmCHNixn24 (the air loops are called RTU-ATELIER and RTU-ATELIER(GAS))