Natural Ventilation not following my inputs on DesignBuilder [closed]

asked 2025-04-28 03:58:27 -0500

Nico001's avatar

updated 2025-04-28 09:14:31 -0500

hello folks, I have problems in simulating my project on DesignBuilder as it doesn't calculate the nat. vent. the way I want. I scheduled in the HVAC tab in this way:

C:\fakepath\Screenshot 2025-04-28 105303.png

Basically it's all about opening windows just in those few hours during the cleaning procedures of the rooms, I didnt add any mechanical ventilation or infiltration, but somehow the model gives me this results:

C:\fakepath\Screenshot 2025-04-28 105619.png

it overestimates a lot my results, considering also that the vac plant is a heated floor so not an air system. Can you help a noob like me?

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Closed for the following reason the question is answered, right answer was accepted by Nico001
close date 2025-04-28 08:43:02.224378

Comments

Apparently the software doesn't automatically translate the schedules from block level to zone levels, I had to manually insert the schedule for each zone in order to make it work.

Nico001's avatar Nico001  ( 2025-04-28 08:42:43 -0500 )edit

@Andy Tindale@Dave@Tokarzewski FYI - DesignBuilder user claims they had to assign a natural ventilation schedule to each zone since assigning it at the block level didn't work.

Aaron Boranian's avatar Aaron Boranian  ( 2025-04-28 09:20:03 -0500 )edit

@Aaron Boranian, thanks for letting us know.

@Nico001 could you send us the problematic model to https://support.designbuilder.co.uk/s... ?

Tokarzewski's avatar Tokarzewski  ( 2025-04-28 10:57:00 -0500 )edit