discrepancy in main meter and sub; calibration

Pablo Fortunato Suarez

Principal ESD Consultant/Architect

GreenArc Sustainable Building & Architecture

LEEDuser Basic Member

170 thumbs up

June 22, 2010

Post a reply

Jenny Carney

Vice President

WSP

LEEDuser Expert

436 thumbs up

Fri, 06/25/2010 - 03:39

One of the supporting documents for to substantiate your energy benchmarking for this prerequisite is utility bills, so your Portfolio Manager inputs should match the values reported to you by the utility. There's no need to breakdown consumption by end use for this prereq (though a breakdown by end use is a part of the energy auditing for EAp1, and also comes into play if you are pursuing the submetering credits.

Pablo Fortunato Suarez

Principal ESD Consultant/Architect

GreenArc Sustainable Building & Architecture

LEEDuser Basic Member

170 thumbs up

Fri, 06/25/2010 - 05:17

Thanks Jenny. Yes I ask in relation to submetering as well. The discrepancy (between total of submeter and utility bill) is in the order of about 6%, not 8%. Will this be acceptable?

Tristan Roberts

Representative

Vermont House of Representatives

LEEDuser Expert

7780 thumbs up

Fri, 07/02/2010 - 03:02

Since as Jenny said, this credit is based on the utility bills, it doesn't look like an issue to me.

Pablo Fortunato Suarez

Principal ESD Consultant/Architect

GreenArc Sustainable Building & Architecture

LEEDuser Basic Member

170 thumbs up

Mon, 07/05/2010 - 12:07

Thanks Tristan. In LEEDuser EAc3.2 notes state: "The total annual energy usage reported in your energy-use breakdown must be within 10% of the total annual energy use reported in EAc1. The annual energy use reported for EAc1 is derived directly from utility bills whereas the breakdown reported for this credit is derived from commissioning or auditing activities, utility bills, or spot or other metering." I guess this answers my question.