Baseline HVAC

Elisabetta Annoni

Building engineer

LEEDuser Basic Member

11 thumbs up

March 24, 2011

Hi, I am about to model the baseline HVAC but it's not clear to me how i should select the energy source to determine the system according to table G3.1.1A of standard 90.1. The project is a renovation of an existing building, the proposed system (VRF) uses electricity as energy source while the existing system uses a fossil fuel boiler. Which is the criterion to select the baseline HVAC? Thanks

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Thu, 03/24/2011 - 18:55

It is based on the installed system so enter the table under the electric column.

Srimannarayana NCVK

ESD Consultant

LEEDuser Basic Member

13 thumbs up

Mon, 10/15/2012 - 05:28

Hi Marcus, I have a similar case but im struggling to find the base case COP for my project. Building size is 8500m2. Base case HVAC system is System 6 packaged VAV with PFP. Proposed design is VRF system with EER of 11.2 (COP - 3.28) Can you please help me determine the base case. The owner of the project is aiming at minimum 21% savings for this project. Thanks - Sriman

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 10/15/2012 - 13:44

For a system 6 the cooling efficiency is taken from Table 6.8.1A. The cooling efficiency is dependent on the size of the system. The heating efficiency for electric resistance is 100% or a COP of 1.0.