1. IGSHPA Technical Conference & Expo October 29–30 2007 Jim Bose OSU/IGSHPA High Performance Housing and Energy Rating Discussions on Appraisers, Evaluators and Other Participants 2:10 – 2:30 PM Oklahoma City

2. 800 Sq Ft $1.63 / Sq Ft / Yr 1665 Sq Ft $0.55 / Sq Ft / Yr 3400 Sq Ft $0.47/ Sq Ft / Yr5400 Sq Ft $0.62 / Sq Ft / Yr Annual Utility Costs/Consumption Conventional (gas & Electric) 73 kWh/m 2 /yr 72 kWh/m 2 /yr 113 kWh/m 2 /yr 1960

3. Construction Date Building Size Sq Ft – M 2 Total Utilities $/Sq Ft/Yr – kWh/m 2 /yr 11960 ST 800 - 741.63 - ? 21974 KG 1322 - 1231.27 - ? 31973 LE 1850 - 1721.04 - ? Conversion to GSHP 2006 1850 - 1720.64 - ? 42001 JB 5746 - 5340.62 - 113 52002 RD 3400 - 3160.47 - 72 62003 LM 1665 - 1540.55 - 73 Utility Costs of Conventional and GSHP

4. Conventional Variable Air Volume (VAV) Building 15,000 Sq. Ft. 1.32 $ / sf / yr

5. Geothermal Building 20,000 Sq. Ft. 0.55 $ / sf / yr

6. Dallas / Ft. Worth Area: 301,000 sq ft Annual Cost: $0.60 / Sq Ft donpenn.com

7. GEO 4 - Pipe 4 – Pipe Thermal Storage Installation Costs for Centennial – $6.8 Million Installation Costs for Wakeland - $6.7 Million Don Penn

8. Conventional Variable Air Volume (VAV) Building 15,000 Sq. Ft. 1.32 $ / sf / yr

9. Geothermal Building 20,000 Sq. Ft. 0.55 $ / sf / yr