The 90.1-2010 User's Manual states: "In some cases, a complete HVAC system already exists (...) the proposed building and baseline building models are the same and are based on the existing HVAC sy

Hi, We have project in Pakistan and we had done all measures for LEED certification, but due to some client personal reasons we were not able to register this project with USGBC and now after 1.5

Markus, thanks again. Since the English is not my mother tonge, sometimes I'm geting confused by enterpreting some explanation although I'm already 37 years in the HVAC branch.

I may have helped you, now its your turn to help us all. The USGBC is seeking input and information related to the modeling of naturally ventilated and naturally conditioned buildings.

Does anyone have a link to a concise list of the differences between 90.1-2007 and 90.1-2010?

Since the energy model is based off of an existing building.

Greetings, In the IEQp1 calculation form, provided by USGBC for using in LEED v4, in the Occupancy Category pull-down menu, there is nothing related to equipment rooms, non-occupied stores and sim

For chillers in EnergyPlus I have to provide the data “Minimum Unloading Ratio”.

Is there any new guidance or published changes for modeling district energy loops in LEED v4?

We are building an addition to an existing building that has a central plant that is outside of our LEED boundary. However, we also have a contract to improve the performance of the central plant.