Based on ASHRAE 90.1, the chilled water pumping power must be 22 W/gpm and does not mentioned the effect of pumping head.

We are working on a project which is mixed use facility (6 storey/G+5) . The first & 2nd floor is used for office & remaining for residential.

Markus, thanks a lot for your answer. Another issue appeared to this Heating only system - Baseline modeling of DHW (Domestic Hot Water). The Proposed model is having a gas fired boiler to provide

Shall the mandatory efficiency of section 6.4 (Tables 6.8.1) be verified also for a chiller that works as backup system (the chilled water is provided in normal conditions by district cooling)? Be

The Bird's Eye View comments on this page indicate that the USGBC will allow projects to meet the 10% minimum energy performance threshold with onsite renewable energy.

Does LEED NC v2009 allow us to model and receive credit for energy savings resulting from DHW conservation due to the installation of low-flow fixtures inside of apartments in a multifamily buildin

90.1 only says above grade wall, but if we have a wall that's directed connected to another building, should we also include those wall area in the calculation?

Hello, We have a project where our resort rooms will be using spray foam insulation above a concrete slab, set in zone 1. Our rooms are actually small villas.

I use Carrier-HAP and according to ASHRAE 90.1 G.1 #4, all baseline HVAC fans should be running continuously when the space is occupied and cycled when the space is unoccupied.

Hi, We are currently responding to LEED Reviewer comments for a building.