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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Mallett Deep Energy Retrofit Presentation
1. The Mallett Deep Energy RetroďŹt
A Renovation for the Next 125 Years
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Freeport Community Services
2. Tonightâs Agenda
⢠Understanding the Concept of Deep Energy
RetroďŹts and Why
⢠The Mallett House in Context--Past and Future
⢠How Weâre Getting a Deep Energy Reduction
⢠Key Construction Details and Testing To Date
⢠Lessons Learned
⢠Reducing Energy Use in YOUR House
⢠Tour
DATE 2
7. 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 energy
Buildings are the largest contributor of greenhouse gas emissions
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8.
9. If every home built from now until 2030 was
Net Zero
weâd reduce residential building energy by
~8%
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11. US Housing Stock
Existing US Housing Stock, 1000âs
25,000
18,750
12,500
6,250
0
Pre1920 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s
signiďŹcant need moderate need some need for
for energy retroďŹt for energy retroďŹt energy retroďŹt
Sources: US Census Bureau, Annual Housing Survey.
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12. The Challenge of Older Homes
Use More Energy
Pre-1940 homes use 32% more energy than 1980âs
Average 120MM btuâs/house vs 81MM
Disproportionately Located in Cold Climates
Have Construction Details that are Energy
Challenges
Basements and Crawl Spaces
Heavier use of fuel oil
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17. DeďŹning âDeep Energy Reductionâ
⢠DOE Building America Program: 50%+
Reduction
⢠ACI 1000 Home Challenge: 75-90% Actual Use
⢠Home Only--no transportation, embodied,
durable goods, vacations, consumables
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18. Beyond Energy Efficiency & Carbon
⢠Resiliency
⢠Affordability
⢠Durability
⢠Comfort
⢠Health
⢠Value
DATE 18
19. Naomi C. O. Beal Photo
57 Depot Street
Freeport, Maine
25. Freeport Retrofit Freeport, ME
ď§ Source Energy Savings â
61% Deep Energy Retrofit
Warren Construction Group
Source Energy Parametric Annual Loads Study
Š 2010
Building Science Day Month Year 25
Corporation
26. Whereâs the Highest Impact?
Triple Paned Windows
High Efficiency Hybrid Heating/Cooling
Air Sealing
Insulation
100% Low Energy Lighting
DATE 26
27. Breaking Out the Reductions
CFL Lighting
8%
High Eff Heat/Cool
14%
Windows
5% Air Sealing
53%
Insulation
21%
DATE 27
31. Insulating In vs Out
Advantages of Going In Advantages of Going
⢠Minimizes exterior impact visually Out
⢠Siding and rooďŹng 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 RooďŹng or
Windows
⢠Plastic materials to the exterior
⢠Proven wall & roof assembly
DATE 31
40. Freeport Retrofit Freeport, ME
ď§ Mechanical Design
Warren Construction Group
ď§ Hybrid heat system:
96% AFUE gas furnace +
18 SEER/9.1 HSPF
air source heat pump
ď§ Cooling: 18 SEER/9.1
HSPF split system
ď§ 0.82 EF instantaneous
water heater
ď§ RenewAire heat recovery
ventilator (HRV)
ď§ 1.2 kW PV system
Example of high efficiency mechanical system
Š 2010
Building Science Day Month Year 40
Corporation
68. Guiding Principles: Staged Approach to
1) Start with the end in mind. Avoid creating barriers for
future phases.
2) Make a value proposition. Embrace non-energy impacts.
3) Do no harm â 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 for
transitional equipment or components.
6) Do each step right and comprehensively the ďŹrst time.
7) Consider clusters of work by trade in order to reduce
transaction costs.
Source: 1000 Home Challenge
DATE 68
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