The definition of Unmet Load Hours has been vague for quite some time. ASHRAE 90.1 2010 was supposed to address this issue. Do we have some resolution about this yet?

Apart from LEED/USGBC, I want to design a pump which can supply hot water at each floor's apartment for space heating (of total 20 floor). what will be the head?

We are considering LEED certification for a four season golf range hitting facility that will have hitting areas with overhead radiant heaters and indoor conditioned areas as well.

What should be the baseline for interior glazing such as for atrium and partitions? Generally, the designed case will be SGU with high U value and SHGC.

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

I am working with a data center project which have 3 floors but air conditioned area is less than 25000 sqft. But total area is exceeding 25000 sqft with unconditioned toilets and corridors.

Would Vacancy sensors comply with the occupancy sensor requirement for classrooms, breakrooms and conference rooms under Ashrae 90.1-2007?

I wonder how would I model the pump control for hot water and chilled water pump if Im using DES v2 option 1.

I am working on a new facility that is mixed-use health care, research laboratory, and conference center. Computing lighting power density by either space-by-space or whole-building method yields

When modeling the Baseline Bldg, where is the best place to add the 15% safety factor for cooling that is allowed by G3.1.2.2?