Has anyone done a VRF system serving various zones using say heat pump VRF units and then providing outside ventilation air from a separate dedicated unit serving the same various zones?

How do I simulate a heat pipe in the Baseline case? The proposed case has two split DX AHUs serving 22 & 15 zones respectively.

We are starting design for a residential tower in Zone 1 (Hawaii) that will use natural ventilation and no mechanical air conditioning.

Can an almost construted building be certified under LEED C&S, if the envelope building is not able to comply with EAP2,EAc1 ASHRAE 90.1.2007 mandatory requirement (OPTION 2 and 3 are not av

Hi The building I'm coping with includes some swimming pools. In the proposed case I've modeled them so that they conform to the project. How should I model them in the baseline case?

Should under-cabinet, individually-controlled, task lights be included as part of the ASHRAE building area method lighting power density calculation?

Hello, In the proposed building simulation, some of the spaces are not yet defined and therefore are being simulated as office spaces with System 3 - PSZ-AC.

If I model a building where there is mechanical ventilation, how shall I consider the infiltration (i.e.

Our LEED-Schools 2009 project is close to Preliminary Design Submittal. One issue which is still under consideration is the renewable energy system.

Hi, our project is a commercial building which will get 100% of the electricity from PVs (20%) and Gas Fuel Cells (80%).