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The Mallett Deep Energy Retrofit A Renovation for the Next 125 Years
Freeport Community Services 1
352 DATE
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
2
DATE 3
Horizon Foundation
4
Why Go Deep?
39% 27%
7
Energy Use in the US
34%
18%
21%
27%transportation
residentialindustrial
commercial
Source: US Energy Information Adm.
30%
18%20%
32%transportation
residential
industrial
commercial
Buildings are the single largest user of energyBuildings are the largest contributor of greenhouse gas emissions
Use of Energy Greenhouse Gas Emissions
9
If every home built from now until 2030 was Net Zero
we’d reduce residential building energy by
~8%
124 Million
US Housing Stock
11
0
6,250
12,500
18,750
25,000
Pre1920 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s
Existing US Housing Stock, 1000’s
significant need for energy retrofit
moderate need for energy retrofit
some need for energy retrofit
Sources: US Census Bureau, Annual Housing Survey.
The Challenge of Older Homes
12
Use More EnergyPre-1940 homes use 32% more energy than 1980‘sAverage 120MM btu’s/house vs 81MM
Disproportionately Located in Cold Climates
Have Construction Details that are Energy Challenges
Basements and Crawl SpacesHeavier use of fuel oil
13
But it’s only 14% of homespre-1940
180 Coal Plants
16
Deep What?
352
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
352 DATE
Beyond Energy Efficiency & Carbon
•Resiliency•Affordability•Durability•Comfort•Health•Value
18
57 Depot StreetFreeport, Maine
Naomi C. O. Beal Photo
Oak Street, 1894
The Life of 57 Depot Street
23
1st Half 2nd Half
24
57 Depot St Plan
Day Month Year© 2010Building Science
Corporation
Freeport RetrofitW
arre
n C
onst
ruct
ion
Gro
upFreeport, ME
25
Source Energy Savings – 61% Deep Energy Retrofit
Source Energy Parametric Annual Loads Study
DATE 26
Where’s the Highest Impact?
Triple Paned Windows
High Efficiency Hybrid Heating/Cooling
Air Sealing
Insulation
100% Low Energy Lighting
DATE 27
CFL Lighting8%High Eff Heat/Cool
14%
Windows5%
Insulation21%
Air Sealing53%
Breaking Out the Reductions
DATE 28
Deep Energy Reductions are all about
Air Sealing & Super-Insulation
DATE
Insulating In vs Out
Advantages of Going In• Minimizes exterior impact visually
• Siding and roofing not impacted
• Windows remain in place
• Align with interior renovation?
31
Advantages of Going Out
• Can remain occupied
• Minimize code impact (stair widths)
• No impact to partitions, bearing walls
• Align with New Siding or Roofing or Windows
• Plastic materials to the exterior
• Proven wall & roof assembly
DATE 35
Key Construction Details and Lessons Learned
Peter Warren
Wall & Roof
Wall
Windows
Cellar
Day Month Year© 2010Building Science
Corporation
Freeport RetrofitW
arre
n C
onst
ruct
ion
Gro
upFreeport, ME
40
Mechanical Design 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
DATE 52
First Blower Door Test
DATE 60
Energy Reductions in YOUR Home
Josh Wojcik
DATE
Even Simple Buildings Can Be Complex
61
352 DATE
Typical Maine Capes/Farmhouses
62
DATE 63
352 DATE
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 – 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 first time.
7) Consider clusters of work by trade in order to reduce transaction costs.
68
Source: 1000 Home Challenge
DATE 69
Facebook: Mallett Deep Energy Retrofit
70
EnergyCircle.com/Learn/57-Depot
Is it worth it?
Let’s Go See!
DATE
END
72