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Unrealistic service water heating load

Hello all,

I'm currently using Openstudio 1.14 on a windows 10 computer. I'm having problems with the service water heating load- when I follow the OS 0.9 online tutorial instructions for adding fixtures and a service water loop, I get absurdly high natural gas loads for the water heater (almost half the building energy load for two 'bathrooms' with 4 fixtures each- but online sources say service water load for my type of building should only be 5-10% of building energy use). Does anyone have any idea why this might be happening? If I try to auto-size the tank volume or service water heater capacity the simulation has a 'fatal error' and fails- that's the only thing I've tried so far.

Unrealistic service water heating load

Hello all,

I'm currently using Openstudio 1.14 on a windows 10 computer. I'm having problems with the service water heating load- when I follow the OS 0.9 online tutorial instructions for adding fixtures and a service water loop, I get absurdly high natural gas loads for the water heater (almost half the building energy load for two 'bathrooms' with 4 fixtures each- but online sources say service water load for my type of building should only be 5-10% of building energy use). Does anyone have any idea why this might be happening? If I try to auto-size the tank volume or service water heater capacity the simulation has a 'fatal error' and fails- that's the only thing I've tried so far. far.

Unrealistic service water heating load

I'm currently using Openstudio 1.14 on a windows 10 computer. I'm having problems with the service water heating load- when I follow the OS 0.9 online tutorial instructions for adding fixtures and a service water loop, I get absurdly high natural gas loads for the water heater (almost half the building energy load for two 'bathrooms' with 4 fixtures each- but online sources say service water load for my type of building should only be 5-10% of building energy use). Does anyone have any idea why this might be happening? If I try to auto-size the tank volume or service water heater capacity the simulation has a 'fatal error' and fails- that's the only thing I've tried so far.