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?

We are working on a hotel project. The guest rooms have a key tag system where the lights and AC switches off as soon as the guest removes the key from the key slot.

I have a question about fan cycling for system 1 in residential units. G3.1.2.4 says fan should be on whenever space is occupied. Does this applies to residential units?

I have a 90.1 App G. interpretation question. G3.1.2.6 requires economizers in certain climates. The only exceptions are for gas-phase air cleaning and supermarket open refrigerated cases.

I'm modeling a residential building with water to air heat pumps in all apartments.

My project has Primary chilled water pumping and multiple distribution pumps after the heat exchange serving various AHU/RTU cooling coils.

I need to know if there's a Basecase requirement for the exterior color absorption property, named "absorptance" in eQuest?, and if I can gain credits by using bright colors in the exterior, which

Dear All, As part of the Alternative Compliance Path, "Projects outside the U.S.