External Natural Ventilation Problem

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External Natural Ventilation Problem

Postby FabioS » Thu Aug 23, 2018 4:31 pm

Hello Everyone!
I'm using Design Builder from a couple of weeks, and i'm modelling a quite simple residential building of 150 m2. Now i'm running the ''heating design'' calculations in order to know more or less the design capacity of my building, so that i can model the heating system. But here comes the problem: after running the calculations i get a very very high value concerning the External Ventilation (around -104 W/m2, as you can see in the picture) I think also that that's the cause of the high value of heating demand (around 115 W/m2).
What can i change to have proper values?
For sure the problem is not related to the air infiltration or ventilation setpoint temperatures (i've checked different solutions for them and no one solved the problem)
Thank you in advance.
Best regards
Summary Heating Design.png
Summary Heating Design.png (218.14 KiB) Viewed 2151 times
Steady state Heating Design.png
Steady state Heating Design.png (221.69 KiB) Viewed 2151 times

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