ENERGY STAR Homes version 3 Designing and Building to Meet the 2011 Changes Thursday, February 24, 2011 1
Efficiency Vermont is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-aia members are available upon request. This program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation. 2
Learning Objectives At the end of this program, participants will be able to: Understand the new requirements for ENERGY STAR Homes v. 3.0 Understand the costs and benefits of building an ENERGY STAR home Know what resources and incentives are available through Vermont ENERGY STAR Homes to help achieve ENERGY STAR certification in Vermont Learn how to plan and design for compliance with the ENERGY STAR for Homes Version 3 standard 3
Course Evaluations In order to maintain high-quality learning experiences, please access the evaluation for this course by logging into CES Discovery and clicking on the Course Evaluation link on the left side of the page. 4
ENERGY STAR Homes version 3 Designing and Building to Meet the 2011 Changes Thursday, February 24, 2011 5
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2011 January 1 December 31 2010 2012 RBES Groundbreaking before 2011 Groundbreaking after 2010 RBES 2005 RBES 2011 EVT and ENERGY STAR July 1 Permitted and Enrolled before 2011 ESv2 and Current VESH Completing before July 1, 2011 January 1 Permitted or Enrolled after 2010 ESv2.5 and New VESH All completions after July 1, 2011 ESv3 / New VESH Energy Code Plus 11
ENERGY STAR version 3 The Score House size Glazing percentage Air tightness Insulation levels Heating/hot water efficiency Lighting and Appliances Between 60 and 70 Large homes must score better 12
Size Adjustment Factor 13
1200 cfm50 1800 cfm50 400 cfm50 800 cfm50 1000 s.f. Slab 1000 s.f. Basement 2000 s.f. Basement 3000 s.f. Basement 14
Lighting Appliances 80% ENERGY STAR lighting High use locations Fluorescent or LED Pin-based or screw-in ENERGY STAR Heating and Cooling and Refrigerator and Dishwasher and Clothes washer 15
ASHRAE 62.2 - Ventilation Whole House Ventilation Spot Exhaust Ventilation Exhaust fan or balanced system Sized for people and square feet Programmable control Delivers adequate fresh air Kitchen 5 ACHk 100 cfm plus vented hood Bathroom 50 cfm (20 cfm if continuous) 16
Ventilation Air Inlets 10 from contamination sources 4 above grade 1/2 rodent screen 17
Mechanical: Heating, Cooling, DHW Power vented or sealed (Including fireplaces and woodstove) 18
Mechanical: Ducted Heating and Cooling Accurate load calculation Efficient filtration Performance testing AC charge System flow Room balancing Duct design Duct leakage 19
Mechanical: Load Calculations Design temperatures from ACCA Size of house Number of bedrooms Solar orientation Window area Window performance value Building tightness Filter static pressure 20
Mechanical: Efficient Filtration MERV 6 filter or better Well-designed filter slot 21
Mechanical: Equipment Selection per Manual S Manual S or OEM recommendation Within 95-115% design load AHRI certificate required for AC systems 22
Mechanical: Performance Testing Refrigerant Charge Subcooling deviation no greater than 3ºF System air flow Within 15% of design value 23
Ducts: Distribution Design Ducts and air handler located fully within thermal envelope Duct system designed and installed per Manual D 24
Ducts: Performance Testing 25
Ducts: Leakage 26
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Mechanical Documentation Manual J Report AHRI Certificate (Air Conditioning) Balancing Report # Returns each room Measured flow rate each room 28
Site Graded to drain away from house Impermeable surfaces sloped away from house Protect your materials! Materials with visible signs of water damage or mold prohibited 29
Foundation: Slab Exposed slab insulated at edge R-15 Aligned with framed wall above R-15 under heated slabs Capillary break 4 aggregate + polyethylene or polystyrene OR 4 sand + geotextile matting + polyethylene or polystyrene 30
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Foundation: Basement R-15 continuous or R-20 framed wall No vapor barrier on interior of below-grade walls 34
Air Barrier Blocks air flow Durable Not Kraft-facing or paper Not easily torn Sealed Rigid material strongly recommended 35
Insulation Grade I quality installation No gaps < 2% area compressed Minimum R-6 behind insulation displacement Nailers Vent stack Speakers, etc Insulation must be dry before being enclosed 36
Insulation Grading Grade I Enclosed on 6 sides In full contact with enclosure No gaps < 2% compression 37
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Framed Floors R-30 Fully enclosed insulation cavity Floors over garages Room trusses Cantilevered floors Interior insulation enclosure at band Mudsill gasketed and sealed 39
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Windows and Doors U factor.32 Weighted average of all fenestrations 15 s.f. exempted for decorative windows or doors Fully flashed rough opening Rough opening sealed 41
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Walls Complete weather resistive barrier Lapped to shed rain Integrated with flashing 43
Framed Walls R-20 cavity insulation OR R-5 continuous + R-13 cavity Fully enclosed insulation cavity Balloon-framed gable walls Room truss Double walls Kneewalls Different ceiling heights Behind Showers, tubs, fireplaces, skylight shaft Party or common wall sealed at exterior 44
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Framed Walls Reduced Thermal Bridging R-5 continuous insulation OR Advanced framing 24 oc for 2X6 Insulated headers, corners and wall intersections Limited framing at windows and doors No structurally-unnecessary studs OR Solid walls SIP s ICF s, etc 46
Ceilings R-49 with R-38 at inside of perimeter wall OR R-38 throughout 47
Ceilings Fully enclosed insulation cavity Strapping Exception for topside of attic insulation Windwash protection at eve Sealed fan cutouts Air tight recessed lights With gasket 48
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Ceilings Shafts sealed Utility shafts Chimney surround Dropped ceilings and soffits insulated Attic access hatch Insulated per ceiling Gasketed or sealed Party or common wall sealed at attic 50
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Drywall Non-paper-faced wall board behind tub-shower Exception for 1-piece tub-shower Drywall sealed to top plate at attic 52
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Roof Flashing Step flashing and kickout at roof-wall Integrated with house wrap Gutters OR At-grade roof-water collection system Self-sealing membrane at Valleys Eves > 2 above wall 54
SIP s Joints sealed AND taped 55
Builder Orientation and HVAC Accreditation 56
ENERGY STAR v3 is a Team Effort 57
Efficiency Vermont New Construction Services Energy Code Plus Vermont Energy Star Homes 58
Efficiency Vermont New Construction Services Energy Code Plus Vermont ENERGY STAR Homes 59
Efficiency Vermont New Construction Services Energy Code Plus Incentives Two inspections Performance Testing Energy Rating at no cost Energy Code certificate Appliance bonus (2 out of 3) Refrigerator, dishwasher, clothes washer Tier II or Tier III $200 60
Insulation Grading Grade I Enclosed on 6 sides In full contact with enclosure No gaps < 2% compression 61
Insulation Grading Grade II Enclosed on 6 sides In full contact with enclosure < 2% gaps < 10% compression 62
Vermont Energy Star Homes Efficiency Vermont New Construction Services Incentives Two inspections ENERGY STAR label Energy Rating at no cost Energy Code certificate EPACT $2000 certificate* High Performance bonus $75/point below 60 (55 for homes > 3000 sf), max $1500 Appliance bonus (2 out of 3): refrigerator, dishwasher, clothes washer Tier II or Tier III $200 63 * As applicable