Modeling electric resistance heater in CBECC

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I am trying to model electric unit heater for a stairwell in CBECC Non-Res 2022 but for some reason when I use 'furnace' as my zone system and create a heating coil(electric resistance) with a fan, the output report spits out that there is a no cooling system for that stairwell and assigns it a random cooling coil capacity. It seems that the software is thinking that there should be a cooling happening although there is none. I have tried unchecking the box where it says 'add cooling system to meet the load' but no luck. Please guide if you have any idea.