Building Energy Code:

Transcription

1 BSA meeting Building Energy Code: Overview in MA Ian Finlayson Deputy Director, Energy Efficiency Division

2 National Model Code Refresher Updates every 3 years open stakeholder process Approx 30% EE savings in 6 years 15-20% improvement target in 2013/2015 cycle New Green Codes International Code Council (ICC) ASHRAE Int. Energy Conservation Code (IECC) Int. Green Construction Code (IgCC) Standard 90.1 (commercial energy code) Standard 189 (commercial green code) 2

3 Code adoption in MA Independent Board of Bldg. Regulations & Standards (BBRS) Supports ICC codes (IECC + ASHRAE 90.1 for energy) with minimal MA amendments BBRS limited jurisdiction makes IgCC adoption difficult in MA Additional State review Exec. Order 485 Stretch code needs municipal bylaw City council vote Town meeting vote 3

4 MA Code Landscape Baseline Energy code: Green Communities Act requires latest IECC adoption Stretch Energy code: Green Communities Program needs a higher standard Advanced energy codes: Part of Clean Energy and Climate Plan for 2020 Stretch code also creates opportunity To streamline building code To promote performance-based code To influence future IECC updates To improve compliance 4

5 Statutory language: IECC adoption *Chapter 169 of the Acts of 2008, An Act Relative to Green Communities, 55 reads: To adopt and fully integrate the latest International Energy Conservation Code as part of the state building code, together with any more stringent energy-efficiency provisions that the board, in consultation with the department of energy resources, concludes are warranted. The energy provisions of the state building code shall be updated within 1 year of any revision to the International Energy Conservation Code.

6 Green Communities : Requires a stretch option *MGL Chapter 25A, Section 10, (c),(6) The Green Communities Act requires municipalities wishing to be designated as Green Communities to: (6) require all new residential construction over 3,000 square feet and all new commercial and industrial real estate construction to minimize, to the extent feasible, the life-cycle cost of the facility by utilizing energy efficiency, water conservation and other renewable or alternative energy technologies.

7 Baseline Energy Code 7

8 Baseline Energy Code Update MA 780 CMR Base Energy code: IECC 2009 with MA amendments Stretch Energy code: Appendix 115.AA IECC 2012 with MA amendments in public comment period Public hearing May 14 th, 2013 Public comments until 5pm June 4, to 12 month concurrency period expected IECC 2012 likely to take effect July 1,

9 Residential IECC Code requirement IECC 2009 IECC2012 Summary of Change Improved Air sealing Optional test, max 7 ACH@50^ Mandatory test, max 3 ACH@50^ Adopts testing widely used by Stretch code, Energy Star and LEED homes Improved Duct sealing Max 12% /min air leakage Max 4% /min air leakage Not required if ducts stay inside insulated spaces Ventilation requirement Required for less than 5 ACH@50 Required for new homes (5 ACH@50) Same requirement, but now applies to all new homes due to improved air sealing Increased Ceiling insulation default Basement/Crawl space wall insulation default R-38* R-49* 29% increase to easiest area tradeoffs allowed R-10/13* R-15/19* From 4 to 6 cavity insulation or 2 to 3 of foam Window heat loss U 0.35* U 0.32* Improved to match current market standard Hot water pipe insulation Not required R-3 or shorter thinner pipes shortens time taken for hot water to arrive at faucet, saving water & energy Efficient lighting 50% of all hard wired fixtures 75% of all hard wired fixtures Code follows national phase-out of incandescent lights

10 Residential MA amendments Clarifies mechanical ventilation language Updates HERS (65) + EPA checklist option - Similar to current 2009 stretch Retains Passivehaus PHPP option Could clarify who is qualified for testing

11 Commercial IECC Code requirement IECC 2009 IECC2012 Summary of Change Windows Area and insulation U-values Default window area is 40% of wall area Default window area is 30% of wall area, 40% with daylighting, incremental insulation increases Improves envelope and window insulation levels still more glass and less insulation than residential E.g. Office 0.9 watts/ft 2 [1] 10% improvement in energy Lighting power density E.g. Office 1.0 watts/ft 2 efficiency of office and retail lighting Lighting controls Some requirements Expanded with new incentives for daylighting Heating and cooling load sizing Demand controlled and heat recovery ventilation Improved HVAC efficiency HVAC Commissioning Cooling equipment economizers Required Optional for most buildings 2008 Industry standards Some commissioning required Required on large equipment Required: updated ASHRAE/ACCA standard Required for most with exceptions for small bldgs, and certain uses. Increased lighting control, and auto-shut off for lights when not needed Intended to ensure that heating and cooling systems are not oversized Requires fresh air to be pre-heated by outgoing air in winter where practical 2011 Industry standards Updated to match industry efficiency improvements More comprehensive commissioning required Required on smaller and simpler systems Ensures building heating, cooling & ventilation operate as designed prior to building occupancy Expands use of fresh air to help cool buildings when conditions allow 1 of 3 additional options No requirement Creating A Cleaner Improved Energy Future lighting For (based the Commonwealth on Adds cost-effective options to get ) or improved an additional 3-5% energy savings.

12 Commercial MA amendments Updates HERS (65) + EPA checklist option - Similar to current 2009 stretch for multi-family Retains Passivehaus PHPP option Adds option for clean Biomass credit Could require under slab insulation - Retain IECC2009 MA amendment language

13 Stretch Code Update 13

14 Now at 130 communities

15 Stretch 2009 Residential New Homes = Performance HERS rating of 65 or 70 Energy star checklist Renovations or Additions: Prescriptive code Energy Star Windows/Doors Energy star checklist 15

16 Stretch 2009 Commercial New buildings & additions only Prescriptive code 5, ,000 sq ft Performance over 100,000 sq ft. Uses ASHRAE appendix G / LEED energy model 16

17 Opportunities for Stretch code Residential: Keep the approach: HERS rating + Energy Star Checklist + IECC mandatory requirements Move HERS rating to ~15% better than IECC 2012 Add new tier for multi-family units Improve indoor air quality move to sealed combustion to reduce combustion safety risk Water heaters, furnaces, boilers 17

18 Opportunities for Stretch code / CHPS Commercial: Keep the approach: Prescriptive for under 100k sq ft. ASHRAE appendix G LEED Model over 100k sq ft. Move to ~12-15% better than ASHRAE Allow source or site energy modeling Blower door testing for small commercial Low cost energy savings under 25k sq ft Streamline prescriptive language in many areas Simplified insulation requirements Allow more credit for renewables & CHP 18

19 Hypothetical timeline June 4 end of BBRS public comment on IECC 2012 June 11 or July 9 BBRS vote to adopt IECC2012 update to base energy code with 12 month concurrency August BBRS recess no meeting Sept December Possible BBRS public hearing on 2012 stretch update followed by 30 day comment period Jan 14th, 2014-BBRS vote to adopt 2012 stretch energy code update to allow at least a 6 month concurrency July 1, 2014 IECC 2012 and Stretch 2012 take full effect.

20 Training, Training, Training 2010: 40 trainings on IECC 2009 and stretch code. Designed for building code officials Outreach to Builders, contractors, designers Conclusion more training needed 2011: expanded training program 40 Builder focused: construction best practices How to meet & exceed the stretch code 15 HVAC training for sub-contractors/designers 5 Deep Energy Retrofits lessons learned

21 Thank you! Questions? Contact info: IECC 2012 Public comments: 21