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Presentation to Freeport Community Services 11.16.11 regarding the Mallett Deep Energy Retrofit. Co presenters were DeWitt Kimball, Peter Warren and Josh Wojcik.

Presentation to Freeport Community Services 11.16.11 regarding the Mallett Deep Energy Retrofit. Co presenters were DeWitt Kimball, Peter Warren and Josh Wojcik.

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  • What many people don’t know is that buildings, both comm and res, use more energy and contribute more to greenhouse gas emissions, than the transporation sector or even industry. Building, collectively, are big polluters and a big problem. Figuring out our energy and climate future means addressing the building energy problem.\n
  • What many people don’t know is that buildings, both comm and res, use more energy and contribute more to greenhouse gas emissions, than the transporation sector or even industry. Building, collectively, are big polluters and a big problem. Figuring out our energy and climate future means addressing the building energy problem.\n
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  • but we can’t build our way out of this problem--even if new construction were net zero or better--houses that actually produce more than they use like BBB, we’re not doing that. The sad fact is that 98% of the new homes we’re building are eligible for an energy upgrade on the day they’re first occupied.\n
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  • Even if we could correct the sorry state of how we build homes today, so that every new building was net zero, it would still only make a dent in the overall energy use of housing because of the sheer size of existing housing stock--there are 124 million houses in the US. and of particular relevance to our story is that half of that number is older housing stock, built pre 1960 and the sector that is historically relevant.\n
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  • Good evening. It’s great to be here. What I’m going to tell you tonight is a story about a house. But it’s also a bigger story about buildings & energy, carbon, affordability, and whether we’re going to be resilient enough to cope with energy costs and a planet that might look very different than it does today. Of course, it’s also a story about choices. \n
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  • So a group of us--myself, FCS, the leading building scientists in N America--have set out to show how it can be done on this handsome, lovely little house in Freeport ME by renovating this building as a deep energy retrofit. DER’s are ways of retrofitting buildings to achieve substantial energy reductions--not 20-30% weatherization projects, but deep reductions of 50-70% or better. \n
  • first about this history--built by Edward Mallett Freeport industrialist, shoe magnate and philanthropist who built these Mallett Houses all across town. In a twist of irony, his shoe factory, shown here, is now the hideous freeport village station mall\n
  • first about this history--built by Edward Mallett Freeport industrialist, shoe magnate and philanthropist who built these Mallett Houses all across town. In a twist of irony, his shoe factory, shown here, is now the hideous freeport village station mall\n
  • all over town, most in private hands, chopped and channeled, added on to, but this row of 4 on depot street with FCS and one private home here on the right. \n
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  • The deep energy retrofit thing. Deep means 50 70 90 . Superinsulation and airsealing for extreme tightness, mechanical ventilation. Not high tech equipment. \n
  • But which way do you insulate? And where is the historic value? Going in has a cascading effect--stairs, walls, partitions, plaster, molding, doors. And it’s impractical for houses in which people live.\n
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  • What made me fall in love with this little house is the combination of simplicity with an attention to detail. Remember this is worker housing. All these lovely visual elements--mix of shingles clapboards, flair, spiderweb, porch struts, chimneys (that have no function), roof trim\n
  • So our challenge as the dimenions of walls move out and roof moves up is to restore and retain the key visual elements--and resolve what happens to them proportionally. We’ve painstakingly figured this out, down to assuring the size of the trapezoid\n
  • The real question given the lineup of these houses is the growth of them proportionality--the street in context--one of these is fatter than the other by 4.5 inches. Can you tell?\n
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  • superinsulation at a nominal R 40 makes for a great wall structure--2 layers, a moisture barrier inside, then cellulose in the existing wall davity. The cladding goes directly on the foam board w furring strips. \n
  • context: part of the town’s community center, a public place, open building, and previously renovated.\n
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  • Basement, esp rubble, are big \n
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Mallett Deep Energy Retrofit Presentation Mallett Deep Energy Retrofit Presentation Presentation Transcript

  • The Mallett Deep Energy Retrofit A Renovation for the Next 125 Years 1 Freeport Community Services
  • Tonight’s Agenda• Understanding the Concept of Deep Energy Retrofits and Why• The Mallett House in Context--Past and Future• How We’re Getting a Deep Energy Reduction• Key Construction Details and Testing To Date• Lessons Learned• Reducing Energy Use in YOUR House• Tour DATE 2
  • Horizon Foundation DATE 3
  • Why Go Deep? 4
  • 39% 27%
  • Energy Use in the US Use of Energy Greenhouse Gas Emissions 27% 32% transportation transportation 30% industrial 34% 21% industrial residential 20% residential 18% 18% commercial commercial Source: US Energy Information Adm.Buildings are the single largest user of energyBuildings are the largest contributor of greenhouse gas emissions 7
  • If every home built from now until 2030 was Net Zerowe’d reduce residential building energy by ~8% 9
  • 124 Million
  • US Housing Stock Existing US Housing Stock, 1000’s 25,000 18,750 12,500 6,250 0 Pre1920 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s significant need moderate need some need for for energy retrofit for energy retrofit energy retrofitSources: US Census Bureau, Annual Housing Survey. 11
  • The Challenge of Older HomesUse More Energy Pre-1940 homes use 32% more energy than 1980‘s Average 120MM btu’s/house vs 81MMDisproportionately Located in Cold ClimatesHave Construction Details that are EnergyChallenges Basements and Crawl Spaces Heavier use of fuel oil 12
  • But it’s only 14% of homes pre-1940 13
  • 180 Coal Plants
  • Deep What? 16
  • Defining “Deep Energy Reduction”• DOE Building America Program: 50%+ Reduction• ACI 1000 Home Challenge: 75-90% Actual Use• Home Only--no transportation, embodied, durable goods, vacations, consumables 17
  • Beyond Energy Efficiency & Carbon• Resiliency• Affordability• Durability• Comfort• Health• Value DATE 18
  • Naomi C. O. Beal Photo57 Depot StreetFreeport, Maine
  • Oak Street, 1894
  • The Life of 57 Depot Street 1st Half 2nd Half 23
  • 57 Depot St Plan 24
  • Freeport Retrofit Freeport, ME  Source Energy Savings – 61% Deep Energy Retrofit Warren Construction Group Source Energy Parametric Annual Loads Study © 2010Building Science Day Month Year 25 Corporation
  • Where’s the Highest Impact? Triple Paned Windows High Efficiency Hybrid Heating/Cooling Air Sealing Insulation 100% Low Energy Lighting DATE 26
  • Breaking Out the Reductions CFL Lighting 8% High Eff Heat/Cool 14% Windows 5% Air Sealing 53% Insulation 21% DATE 27
  • Deep Energy Reductions are all about Air Sealing &Super-Insulation DATE 28
  • Insulating In vs OutAdvantages of Going In Advantages of Going• Minimizes exterior impact visually Out• Siding and roofing not impacted • Can remain occupied• Windows remain in place • Minimize code impact (stair widths)• Align with interior renovation? • Noimpact to partitions, bearing walls • Align with New Siding or Roofing or Windows • Plastic materials to the exterior • Proven wall & roof assembly DATE 31
  • Key Construction Details and Lessons Learned Peter Warren DATE 35
  • Wall & Roof
  • Wall
  • Windows
  • Cellar
  • Freeport Retrofit Freeport, ME  Mechanical Design Warren Construction Group  Hybrid heat system: 96% AFUE gas furnace + 18 SEER/9.1 HSPF air source heat pump  Cooling: 18 SEER/9.1 HSPF split system  0.82 EF instantaneous water heater  RenewAire heat recovery ventilator (HRV)  1.2 kW PV system Example of high efficiency mechanical system © 2010Building Science Day Month Year 40 Corporation
  • First Blower Door Test DATE 52
  • Energy Reductions in YOUR Home Josh Wojcik DATE 60
  • Even Simple Buildings Can Be Complex DATE 61
  • Typical Maine Capes/Farmhouses DATE 62
  • DATE 63
  • Guiding Principles: Staged Approach to1) Start with the end in mind. Avoid creating barriers forfuture phases.2) Make a value proposition. Embrace non-energy impacts.3) Do no harm – Recognize hazards upfront.4) The house is a system; recognize the potential for well-intended actions to yield unanticipated side effects.5) Consider creative approaches such as equipment leases fortransitional equipment or components.6) Do each step right and comprehensively the first time.7) Consider clusters of work by trade in order to reducetransaction costs. Source: 1000 Home Challenge DATE 68
  • Facebook: Mallett Deep Energy Retrofit DATE 69
  • EnergyCircle.com/Learn/57-Depot 70
  • Let’s Go See!Is it worth it?
  • END DATE 72