Unmet Hours - RSS feedhttps://unmethours.com/questions/Question-and-Answer Resource for the Building Energy Modeling CommunityenThu, 27 May 2021 11:42:55 -0500packaged rooftop unit to doas ventilation calculation is different than manually calculation by the spreadsheet calculation per IMChttps://unmethours.com/question/54995/packaged-rooftop-unit-to-doas-ventilation-calculation-is-different-than-manually-calculation-by-the-spreadsheet-calculation-per-imc/ 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 Thu, 27 May 2021 11:38:34 -0500https://unmethours.com/question/54995/packaged-rooftop-unit-to-doas-ventilation-calculation-is-different-than-manually-calculation-by-the-spreadsheet-calculation-per-imc/Comment by Brianna for <p>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 </p>
https://unmethours.com/question/54995/packaged-rooftop-unit-to-doas-ventilation-calculation-is-different-than-manually-calculation-by-the-spreadsheet-calculation-per-imc/?comment=54997#post-id-54997how 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 youThu, 27 May 2021 11:42:55 -0500https://unmethours.com/question/54995/packaged-rooftop-unit-to-doas-ventilation-calculation-is-different-than-manually-calculation-by-the-spreadsheet-calculation-per-imc/?comment=54997#post-id-54997Comment by Brianna for <p>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 </p>
https://unmethours.com/question/54995/packaged-rooftop-unit-to-doas-ventilation-calculation-is-different-than-manually-calculation-by-the-spreadsheet-calculation-per-imc/?comment=54996#post-id-54996the same system , and the vrf auto sizing has 0 cooling capacity ; but the heating is fineThu, 27 May 2021 11:41:01 -0500https://unmethours.com/question/54995/packaged-rooftop-unit-to-doas-ventilation-calculation-is-different-than-manually-calculation-by-the-spreadsheet-calculation-per-imc/?comment=54996#post-id-54996