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Energy Audits

Energy Audits. Building Energy Brent Mellen Scott Gardner. Services & Expertise: Energy Audits Insulation & Weatherization Solar Power Solar Hot Water Bio-fuel Boilers. Energy Audit Process. Site Visit: Check Heating System Blower Door Test Energy & Indoor Air Quality Inspection

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Energy Audits

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  1. Energy Audits Building Energy Brent Mellen Scott Gardner

  2. Services & Expertise: • Energy Audits • Insulation & Weatherization • Solar Power • Solar Hot Water • Bio-fuel Boilers

  3. Energy Audit Process • Site Visit: • Check Heating System • Blower Door Test • Energy & Indoor Air Quality Inspection • Infrared Photos • Energy Savings Evaluation • Recommendations, Incentive Opportunities & Quote • Follow-up

  4. Building Evaluation • Tour Building with Owner • Measure up • Square Foot Area • Ceiling Height • Walls, windows, doors

  5. Building Evaluation • R Values • Basement • Walls • Attic • Hazards • Knob and Tube • Vermiculite • Asbestos • Mold & Water Damage

  6. Heating System • Combustion Appliance Zone (CAZ) Testing of the boiler or furnace • System efficiency comparison • Distribution efficiency

  7. Blower Door Test Get Air Leakage Number • Benchmark energy use & air infiltration rates

  8. Energy Evaluation • Document Air Leaks • Windows & Doors • Outlets • Chimneys • Attics • Stairwells

  9. Energy Evaluation • Electrical: • Appliances • Lighting • Occupancy Sensors • Energy Metering

  10. Indoor Air Quality • Combustion Appliances • CO • Moisture • Vermiculite / Asbestos

  11. Infrared Photos

  12. On-Site Wrap-up • Measure for suitability of solar electric or hot water • Thank Customer

  13. Back at the Office • Report • Crunch Data, estimate heat loss • Create context for fuel use, electrical use, and air leakage • Recommendations with Pricing • Highlight most important and best energy saving measures • Incentive Report

  14. Case Studies – Lakeview Inn • +/- 9,500 square foot floor area of heated/living space • 2,760 gallons of oil = 381.2 million BTU • 40,126 BTU/square foot floor area, not fully occupied • 11,000 CFM50 Background

  15. Case Studies – Lakeview Inn • Air seal and insulate basement and crawlspaces • Air seal and insulate floor below heated/cooled space • Air seal and insulate accessible 2nd floor frame areas (frozen pipes) • Replace heating system Major Opportunities

  16. Case Studies – Lakeview Inn Savings and Costs • Savings • 23% reduction in air leakage • +/- 18% reduction in heating energy savings for envelope improvements only • $1,353 per year savings • 20% or more savings in heating fuel consumption for boiler upgrade, fuel switch, elimination of glycol • Additional electrical savings • Costs • $14,325 envelope, not including maintenance staff labor • $2,183 Efficiency Vermont incentive • $12,142 Net Cost • Benefits • 9 year simple payback, 11% ROI • Increased comfort, less maintenance, no more frozen pipes, etc…

  17. Case Studies – Charlotte Town Hall • 4500 square foot floor area of heated/office space • 2,100 gallons of oil = 289.6 million BTU • 64,296 BTU/ square foot floor area • 12,184 CFM50 Background

  18. Case Studies – Charlotte Town Hall • Major Opportunities • Air barrier above ceiling • Reduce HVAC system size • Install ERV system • Insulate duct work • Re-insulate the meeting room kneewalls and cathedral ceiling • Insulate exterior slab wall • Insulate exterior walls

  19. Case Studies – Charlotte Town Hall Scope of work (Work In Progress) • Air barrier above ceiling • ~ 18% air infiltration gain! • Install super-efficient ERVs • Installed separate systems in East and West building sections • Fully insulated ducts, run in the conditioned space to reduce heat loss • Knee-wall insulation • Retrofit 2 light fixtures & 3 exit signs

  20. Case Studies - Williston Town Hall Background • 6,010 square foot floor area of heated/office space • 3,673 ccf natural gas = 404 million Btu • 61,114 BTU/square foot floor area • 5,200 CFM50

  21. Case Studies - Williston Town Hall Major Opportunities • Re-insulate and air seal the attic • Remove A/C ducts in the attic • Replace heating system with two smaller, more efficient units • Replace hot water tank with smaller unit or on-demand

  22. Opportunities, Benefits & Paybacks • Long-term energy savings • Reduce carbon emmissions • Reduce reliance on foreign energy sources • Audits sometimes identify huge energy improvement opportunities with quick pay-backs. • Grants • State and Federal Incentives • Better air quality & more comfortable environment • Reduces sick days • Happier employees

  23. Thank you Building Energy Williston, White River, Middlebury

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