Rooftop Unit Replacement with Xcel Rebates

Rooftop Unit Replacement Case Study

October 2010

Background: Two rooftop units on the building are eleven years old in serviceable condition and our typical recommendation would be to leave the units in place. The customer desires a more ‘green’ building and would like to approach zero carbon emissions with energy expenditures.

Equipment Recommendations:

11 EER (Energy Efficiency Ratio)

Carrier 6 ton RTU

Carrier 7.5 ton RTU

Total price with equipment, parts, labor, permit (Denver) and taxes*           $18,325

12 EER

Carrier 6 ton RTU

Carrier 7.5 ton RTU

Total price with equipment, parts, labor, permit (Denver) and taxes*           $19,951

Cost Analysis

Both 11 EER and 12 EER qualify for Xcel rebate*. The amount of the rebate is based on tonnage and EER rating. The equipment does not qualify for LEED points but does upgrade to newer R-410A refrigerant.

Xcel Rebates as of October 2010

11EER equipment rebate                    $   675.00

12 EER equipment rebate                   $1,215.00

Annual Energy Savings of 12 EER Equipment vs. 11 EER

6 ton Rooftop Unit                             $865.38

7.5 ton Rooftop Unit                          $277.42

Final Recommendation:

The difference in the Xcel rebates of $540 is a 1/3 of the difference in price between the 11 EER and 12 EER.  The difference in operating costs is $1,142.80. The combined savings for the 12 EER versus the 11 EER pays for the upgrade from 11 EER to 12 EER. There would be additional cost savings with each year of operation.

 

*All prices quoted change with time and rebates may not be available after select time period. This case study is time sensitive.