1. NCAT- Butte 3040 Continental Drive P.O. Box 3838 Butte, MT 59702 1-866-723-8677 www.ncat.org Pursuing Energy Conservation Opportunities in YOUR School Start with an Energy Audit

2. Introduction Dave Houser, P.E. ~ Director of Business Development- Energy Services, NCAT Tom Pelletier ~ Energy Efficiency Marketing Specialist, NCAT NCAT Background and Services Non-profit Sustainability Energy + Agriculture NWE Program Contractor 30+ Years Experience

3. NCAT Role NWE Program Contractor Marketing Project Facilitation Engineering Analysis

4. Topics of Discussion Understanding Energy Usage Recognizing Savings Opportunities Why get an audit? How do you get there from here?

5. Understanding Energy Usage

6. Energy Conservation Strategies Lower wattage lighting and lighting controls Advanced HVAC controls Upgrading process equipment Building Envelope Improvements Maintenance of existing equipment Reduced operating hours

7. Case study ~ Large Gymnasium Existing Condition Approximately 13,000 Square Feet Fifty 400-Watt Metal Halide Fixtures 50 Foot-Candles @ 1.73 Watts / Sq. Ft. Estimated Lighting Cost - $10,300 /Yr Recommend Conversion to Fifty 4-lamp T5HO/WM Fixtures with Occupancy Sensors on each Fixture 42 Foot-Candles @ 0.83 Watts / Sq. Ft. Retrofit Cost Estimate - $ 25,000 Annual Bill Savings - $7,000 Utility Rebate - $7,500 Simple Payback 2.5 Years Larger Facilities Higher Light Levels

8. Case study ~ Small Gymnasium Existing Condition Approximately 6,500 Square Feet Sixteen 400-Watt Metal Halide Fixtures 30 Foot-Candles @ 1.11 Watts / Sq. Ft. Estimated Lighting Cost - $3,300 / Year Recommend Conversion to Sixteen 4-lamp T5HO/WM Fixtures with Occupancy Sensors on each Fixture 26 Foot-Candles @ 0.5 Watts / Sq. Ft. Retrofit Cost Estimate - $ 8,000 Annual Bill Savings - $2,200 Utility Rebate - $2,400 Simple Payback - 2.6 Years

9. Case study ~ Classroom Existing Condition Approximately 1,000 Square Feet Eight 4-lamp 32 Watt T8 Fluorescent Fixtures 50 Foot-Candles @ 0.9 Watts / Sq. Ft. Estimated Operating Cost - $400 / Year Recommend Conversion to 25 Watt T8 Fixtures with one Classroom Occupancy Sensor 45 Foot-Candles @ 0.7 Watts / Sq. Ft. Retrofit Cost Estimate - $ 300 Annual Bill Savings - $ 200 / Year Utility Rebate - $ 100 Simple Payback – 1 Year

10. Comprehensive School Retrofit Existing Condition Estimated Annual Energy Consumption: 704,809 KWh Obsolete building controls Dual duct system with air mixing at constant volume Standard efficiency motors Inefficient lighting No lighting controls Oversized and aged boilers

11. Recommend Conversion HVAC system Improvements Dual Duct air system modifications Control upgrade VAV conversion 60 Hp Supply and 20 Hp return fan motor replacement CO2 sensor in return air duct to control outdoor air New motor and VFD on CP-1 pump Gymnasium HV system improvements Modify ventilation units for one unit to run most of the time Install variable frequency drives Replace motors with premium efficiency motors Install CO2 sensors to control ventilation Reduce locker room exhaust; balance air systems Replace 32 Watt T-8 lamps with 25 Watt T-8 lamps

12. Comprehensive School Retrofit Annual Energy Savings 47,138 KWh electricity = $16,940/yr 567.8 DKT of natural gas =$6,960/yr $23,900 per year Estimated Project Cost HVAC measures = $67,315 Lighting retrofit = $25,312 Total estimated project cost = $92,627 Simple payback without rebates = 3.9 yrs Rebates =$2,531 Simple payback with rebates = 3.76 years

13. Why get an Audit? Identify action items and incentives Defend taking further action Not to keep dust off the shelf

14. How do you get there from here? Define the project scope Obtain buy-in/board approvals Communicate project economics Project financing options Identifying qualified contractors Competitive bidding Construction oversight

15. Investor-Owned Energy Company Incentives Service Offered Northwestern Energy Montana Dakota Utilities Free Commercial Energy Audit YesNo Commercial Lighting Rebate Program Yes

16. Federal Administration Bonneville Power Administration Commercial Technical Services Commercial and Industrial Lighting Rebates Western Area Power Administration Commercial Technical Services

17. Montana Electric Cooperatives Free Energy Audits Flathead Electric Cooperative Glacier Electric Cooperative Lighting Rebate Programs Flathead Electric Cooperative Glacier Electric Cooperative Lincoln Electric Cooperative

18. Next Steps Energy Audit Break out Sessions 8:30-9:15 am ~ NCAT & Northwestern Energy 10:20-11:05 am ~ NCAT & Northwestern Energy 9:25-10:10 am ~ Western Utilities 11:15-12:00 noon ~ Eastern & Central Utilities NCAT- Butte 3040 Continental Drive P.O. Box 3838 Butte, MT 59702 406-494-4572 www.ncat.org