Green Retrofit. Why you should consider it, what it means, and how to get it done

Transcription

1 Green Retrofit Why you should consider it, what it means, and how to get it done

2 Table of Contents What is green retrofit and green rehab Fundamental Principals Why the Demand? Why it is important A macro view of Energy needs, environmental impact of development and the future of energy for multifamily buildings This is good for the environment and will save you Money

3 Table of Contents Green Building Standards LEED Energy Star Enterprise Green Communities Criteria Passive House The Green Refit Process Green Repairs absent Certification and Green Audit Resources

4 What is Green Building Green Building (also known as green construction or sustainable building) expands and complements the building design concerns of economy, utility, durability and comfort Green Buildings are designed to reduce the overall impact on human health and the natural environment by: Using energy, water and other resources more efficiently. Reducing waste, pollution, and environmental degradation.

5 Fundamental Principles Structure design efficiency (secure the building envelope) Energy Efficiency Water Efficiency Materials Efficiency

6 Fundamental Principles Protection of health and indoor environmental quality Reinforcement of natural systems Waste and toxic reduction

7 Why the Demand? Unprecedented level of government initiatives Heightened residential demand for green construction Improvements in sustainable materials A unique way to improve building efficiency and lower expenses Availability of subsidies and financing Source: Facility Management Institute 2008 U.S. Construction Overview

8 Environmental Impact Macro View

9 Environmental Impact Macro View

10

11 Global Energy and Climate Portion of U.S. annual energy use created by the combustion of fossil fuels: 82 percent U.S. contribution of global greenhouse gas emissions: about 16 percent U.S. population relative to the world: 4.4 percent Amount greenhouse gas emissions have increased between 1970 and 2004: 70 percent Period of time in which the 10 hottest years on record have occurred: 1998 to 2015

12 Global Energy and Climate Combined number of commercial buildings and industrial facilities in the United States: nearly 6 million Number of U.S. commercial buildings: 5.6 million Number of U.S. industrial facilities: 346,000 Combined annual energy costs for U.S. commercial buildings and industrial facilities: $400 billion Portion of energy in buildings used inefficiently or unnecessarily: 30 percent

13 Global Energy and Climate U.S. greenhouse gas emissions generated by commercial buildings: 16 percent If the energy efficiency of commercial and industrial buildings improved by 10 percent, the collected savings would be: Amount of money: $40 billion Amount of greenhouse gas emissions prevented: equal to the emissions from about 49 million vehicles or about 19 percent of all registered highway vehicles in the United States.

14 Table of Contents (cont) Green Repairs

15 Why Go Green? Going Green is the right thing: reduce carbon consumption, energy independence, encourage community, preserve natural systems

16 Why Green is good for you? Improve the health of members by improving air quality and removing toxins. More durable More energy efficient Lower utility bills, improves property cash flow Studies have shown that green buildings have higher occupancy and therefore higher incomes.

17 * ** Green Building Occupants Are Healthier & More Productive In the U.S., people spend on average 90% or more of their time indoors* Indoor pollutant levels may be 2 5 times higher than outdoor levels EPA ranks poor Indoor Air Quality (IAQ) in the top 5 health risks** Costs to Americans estimated at: $1.5 billion in medical bills Tens of billions in lost productivity & absenteeism LEED certified project case studies illustrate 2-16 % increased worker and student productivity

18 One Size does not fit all

19 Green Building Standards Green Building standards include: Leadership in Energy and Environmental Design (LEED) Energy Star Enterprise Green Communities Passive House

20 Green Building Standards Metrics for such green benefits are articulated and certified by LEED, Enteprise Green Communities, Passive House or other organizations Green standards measure different environmental qualities of buildings Each has a different emphasis and purpose

21 LEED LEED Leadership in Energy and Environmental Design Administered by the U. S. Green Building Council Voluntary, consensus-based system

22 LEED An analytical basis for point allocation. An extensible analytical foundation to address new issues and new green building strategies.

23 LEED Certification Scorecard Breakdown Materials & Resources 14% Indoor Environmental Quality 17% Sustainable Sites 21% Water Efficiency 11% Energy & Atmosphere 37% Total : 100 points Sources: LEED-NC (V2.2) Point Breakdown. siemon.com/us/white_paper

24 Drawbacks to LEED LEED has been criticized : Focus is not on key factors in current climate change crisis CO2 and energy Looks only at prescriptive design, not measurable performance Favors bells and whistles, not basic good design Too complicated, bureaucratic and expensive

25 Energy Star A program of the US Environmental Protection Agency Focuses on energy consumption Different tools for residential and commercial buildings

26 Energy Star -- Residential Home Energy Rating System (HERS) Index established by the Residential Energy Services Network ( Home meeting the 2006 International Energy Conservation Code scores 100 and a net zero energy home scores 0. Each 1-point decrease in the HERS Index corresponds to a 1% reduction in energy consumption compared to the HERS Reference Home. To qualify for Energy Star, a home in Washington State (Climate Zones 4, 5 or 6) must achieve a HERS Index score of 85 or lower.

27 Energy Star - Commercial National Energy Performance Rating System -- scale of A building that scores 75 or above on this scale (placing its energy performance among the top 25 percent among similar buildings nationwide) can earn an Energy Star label. Energy Star also offers an energy management tool, Portfolio Manager, on the energystar.gov web site.

28 Enterprise Green Communites Criteria Enterprise is a national affordable housing organization that provides technical assistance, loans and other products to the multi-family housing industry Criteria was established in consultation with some of the nation's leading environmental, public health and green building experts. This green building framework is the first in the nation to address the unique needs of the affordable housing sector.

29 Enterprise Green Communities Criteria

30 Passive House Institute Passive House Institute US, Inc. (PHIUS) is a nonprofit 501(c)(3) organization committed to making high-performance passive building the mainstream market standard. PHIUS released the PHIUS+2015 Passive Building Standard in March of 2015, the only passive building standard on the market based upon climate-specific comfort and performance criteria, and the only passive building standard that requires onsite QA/QC for certification.

31 Passive House Institute Developed in cooperation with Building Science Corporation under a US Department of Energy (DOE) grant, the PHIUS+2015 standard targets the sweet spot between investment and payback to present an affordable solution to achieving the most comfortable and cost-effective building possible and the best path for achieving zero energy and carbon

32 Passive House Institute Buildings designed and built to this standard perform 60-85% better (depending on climate zone and building type) on an energy consumption basis when compared to a code compliant building. Additional cost associated with building a new multifamily or rehabbing multifamily typically range between 0% and 1%.

33 Passive House Principles Continuous insulation, no thermal bridges. Air-tight construction Optimized window performance and solar gain Balanced heat/moisture recovery ventilation Minimized mechanical system

34 Passive House additonal considerations Use of Solar heating and electric Consideration of Source Energy issues

35 Environmental Impact Macro View

36 Passive House and future energy needs

37 Passive House and future energy needs

38 Passive House and future energy needs

39 Passive House

40 Passive House vs. Typical House

41 Where the money goes

42 Passive House Air tight envelope/insulation

43 Passive House Air tight envelope/insulation

44 High Performance Windows

45 Centralized Ventilation

46 Ventilation Heat Recovery

47 Efficient Equipment

48 Passive House Solar Gains

49 Source Energy

50 Passive House Performance

51 The Green Retrofit Process Decide to explore green rehab Schedule Energy Audit Select Contractors Manage contractor work to ensure quality, schedule and budget Find the Money! Grants, Rebates, Financing Send bids to contractors Close out Find Contractors who can do the work Develop detailed specifications for bids Track Results to make sure rehab met expectations Compile options into a plan that fits your needs Finalize Scope of work and budget

52 Energy Audit and Assessment The Energy Audit will: Establish a building baseline Define capital expenditure to best enhance operations and complete green rehab Examine incentives potential Anticipate legislation and regulation

53 Energy Audit and Assessment The Energy audit involves the following: Site visit, building walk through Benchmarking current performance ASHRAE Level 1 Audit Environmental Comfort Analysis Comprehensive report with cost analysis

54 Categories of Concern for Energy Audit Building Exterior and Site Water Efficiency Energy and Atmosphere Materials and Resources Indoor Environmental Air Quality

55 Building Exterior and Site Review of building exterior and site may include: Low Impact Site Management Transportation Management Landscaping and Water Conservation Storm-water Management Heat Island Reduction Light Pollution

56 Water Efficiency Goal of audit is to reduce water needed by the building and reduce burden on municipal water supply and treatment facility: Examine Plumbing Fixture and Fittings Leak Management Water Use Measurement Water Reuse/Rainwater collection

57 Water Efficiency-Typical use 30 % of Use % of Use 5 0 Toilet Clothes Shower Faucet Leaks Other

58 Energy and Atmosphere Goals of Energy Audit: Establish energy efficiency and system performance Define management best practices Optimize energy efficiency Encourage renewable and alternative energy sources Support environmental protocols, improve air quality and health

59 Materials and Resources Goals of Energy Audit: Reduce the amount of materials needed Use Materials with less environmental impacts Reduce and manage waste/recycling Encourage use of Energy Star appliances, lighting, and HVAC equipment

60 Indoor Environmental Quality Goals of Energy Audit: Establish good indoor air quality Eliminate, reduce, and manage the source of pollutants Ensure thermal comfort and system controllability Provide for occupant connection to the outdoor environment

61 Green repairs absent certification and Green Audit There are several things you can look at without going through a formal certification of audit

62 Water Heating Offers the largest opportunity to save energy in multifamily housing. Increase thermal efficiency Solar hot water Improve distribution system

63 HVAC Substantial savings can be accomplished by replacing outdated heating systems and air conditioners

64 Appliances Cooking and refrigeration make up a large portion of energy use in multifamily housing Efficient Dishwashers and clothes washers save both water and energy

65 Common Area Lighting Creates a significant energy load unique to multifamily housing Photocells and timers can significantly reduce energy use Energy efficient lighting can drive down electric expense

66 Water Fixture With typical payback of less than two years, highefficiency faucets and shower heads is an easy way to save water

67 Toilets Toilets use more water than any other fixture Toilets installed before 1994 use over twice as much water as the standard toilet today Low Flush or dual flush toilets can provide substantial savings

68 Resources

69 Resources Make sure to check your local gas and electric utility websites to see about subsidy and rebate programs they may offer