If air economizers are not required to be modeled in the baseline system due to climate zone (4a) can you model the proposed with economizers if in design and not model economizers in the baseline?

Our project is an office/retail building that is to utilize water source heat pumps for retail and water cooled self contained VAV units for the office floors.

Hi, I previously filed an innovation credit with my design preliminary submission and received an comment from GBCI therefore it is pending.

I have a question about thermal blocks in multy family residential buildings. I'm working with a building that has 4 floors and totly 7 appartments.

Hello everyone, I am working on a residential project. The proposed case HVAC system is Water loop heat pump with cooling tower and natural gas based condensing boilers.

It's clear from the credit language and LEED Online form that California Title 24-2005 Part 6 can be used in place of ASHRAE 90.1-2007 as a baseline when creating an energy model.

Can anyone please clarify which, if any, minimum efficiency requirements are set for heat-pump dehumidifiers (indoor swimming pool dehumidifiers) under ASHRAE 90.1 (2007)?

Greetings, The standard states that the pump power must be 22 W/gpm. If the project has two chillers and primary secondary circuits, whereby there is on pump per chiller in the primary circuits and

Sorry for a couple of elementary questions, but my searches haven't been successful. 1. Is 90.1 compliance required, or only the mandatory provisions? 2.

Hallo, I have read the insulation requirements in Section 7.4.3 but it seems to focus on circulating and non-circulating systems with a storage tank.