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

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Horizon Foundation

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Why Go Deep?

39% 27%

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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

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If every home built from now until 2030 was Net Zero

we’d reduce residential building energy by

~8%

124 Million

US Housing Stock

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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

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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

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But it’s only 14% of homespre-1940

180 Coal Plants

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Deep What?

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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

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Beyond Energy Efficiency & Carbon

•Resiliency•Affordability•Durability•Comfort•Health•Value

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57 Depot StreetFreeport, Maine

Naomi C. O. Beal Photo

Oak Street, 1894

The Life of 57 Depot Street

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1st Half 2nd Half

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57 Depot St Plan

Day Month Year© 2010Building Science

Corporation

Freeport RetrofitW

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Source Energy Savings – 61% Deep Energy Retrofit

Source Energy Parametric Annual Loads Study

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Where’s the Highest Impact?

Triple Paned Windows

High Efficiency Hybrid Heating/Cooling

Air Sealing

Insulation

100% Low Energy Lighting

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CFL Lighting8%High Eff Heat/Cool

14%

Windows5%

Insulation21%

Air Sealing53%

Breaking Out the Reductions

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Deep Energy Reductions are all about

Air Sealing & Super-Insulation

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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?

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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

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Key Construction Details and Lessons Learned

Peter Warren

Wall & Roof

Wall

Windows

Cellar

Day Month Year© 2010Building Science

Corporation

Freeport RetrofitW

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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

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First Blower Door Test

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Energy Reductions in YOUR Home

Josh Wojcik

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Even Simple Buildings Can Be Complex

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Typical Maine Capes/Farmhouses

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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.

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Source: 1000 Home Challenge

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Facebook: Mallett Deep Energy Retrofit

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EnergyCircle.com/Learn/57-Depot

Is it worth it?

Let’s Go See!

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END

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