Dear all, Hi. For LEED NC certification, I’m modeling a building with 03 floors and less than 14.000 m² conditioned floor area.

Talking about a VRF HVAC system. Is it a mandatory requirement that the VRF condenser and evaporative units must be ARI Certified, according with the Standard 90.1-2007?

Hi All, I am modelling a VRF system using ApacheHVAC in IES. But have no idea which prototype to choose.

Hello I'm working in a energy simulation of a medical clinic, where it is possible to make some types of exams and diagnoses, but it doesn't have spaces like intensive care or surgical areas.

I recently received LEED review comments regarding the treatment of incomplete space in an energy model for a proposed new construction building.

ASHRAE 90.1-2007 mentions that for the Proposed case automatically controlled fenestration devices or shades may be modeled, but manually controlled shades should not be modeled.

My read on ASHRAE-90.1 and numerous forums, is that USGBC may allow for an exceptional calculation to be performed for elevator energy savings, provided that; 1) Schedule of operation remains the s

Dear all, I have a suspended ceiling with a 60 cm air gap between the panels and the reinforced concrete slab where all the electro-mechanical lies, but it doesn't act as plenum zone si

I have a project that is considering using the Core Performance Guide option for compliance with this credit.