From the Desk of

Jorge Torres Cotto, P.E.
Associate, MBO Inc.

Calculation Example:  CO2 Emissions Reduction as a Result of Retro Commissioning and Office Building

Mechanical Calculation for an 84,287 SF Typical Office Building

         2.78 htg + 78.82 clg + 23.13 fans + 0.6 pumps = 105.5 kBtu/h/ft2-yr
Given 10% savings for mechanical 105.5 kBt/h yr x 0.1 = 10,55 kBtu/h/ft2-yr
         10.55 kBtu/h/yr/3.41 + 3.09 + kW/h/ft2-yr
         3.09 kW/h/yr = 0.00309 mW/h/ft2-yr
Given 800 lbs CO2/mW/h gen
         800 x 0.00309 = 2.47 lbs/ft2-yr
Given 2,000,000 ft2 all buildings
Savings =2,000,000 ft2 x 2.47 lbs/ft2-yr = 4,944,000 lbs CO2 per year