packaged rooftop unit to doas ventilation calculation is different than manually calculation by the spreadsheet calculation per IMC

asked 2021-05-27 11:38:34 -0500

Brianna gravatar image

updated 2021-05-27 12:48:33 -0500

I am using openstudio to model doas system which are ducted with vrf. I first tried to run packaged rooftop hp measure to each zone and create a separate vrf loop. but after auto sizing everything, the ventilation rate for this packaged rooftop unit is 2 times higher than I calculated in ventilation spreadsheet for doas system per IMC. I checked ventilation template per zone and plenum. looks like nothing run with the input Thank you

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the same system , and the vrf auto sizing has 0 cooling capacity ; but the heating is fine

Brianna gravatar image Brianna  ( 2021-05-27 11:41:01 -0500 )edit

how they are calculated for ventilation when it comes to ducted/combine system. why is it different from traditional calculation performed by trace and spreadsheet Thank you

Brianna gravatar image Brianna  ( 2021-05-27 11:42:55 -0500 )edit