A Home Energy Workshop

Produced by Central Vermont Community Action Council

In partnership with Efficiency Vermont

What will we learn today?

• Why should we Button Up Vermont?• What are the energy conservation and

efficiency opportunities?• How do homes and buildings lose heat?• Take Action! Resources to help you

Button Up.

Why should we Button Up Vermont?

Vermont’s energy situation

Provided by Vermont Public Interest Research Group

Annual cost to heat with oil

Annual cost to heat by fuel type

Why Button Up?

What are the energy saving opportunities?

• Conservation – Use less energy, mostly low and no cost options.

• Efficiency – Get more work per unit of energy used with efficient technologies.

Opportunities defined

Turn back your thermostat

• For each degree you turn the thermostat down in the winter (around the clock) you save about 2% on your bill.

• A programmable thermostat makes setting back the temperature more convenient.

Reduce hot water usage

• Set hot water tank temperature to 120 degrees F

• Wrap warm pipes and electric tank

• Install low-flow shower heads and faucet aerators

Save energy when you do laundry

• ENERGY STAR® qualified clothes washers save water, energy, and time

• Wash in cold water• Only wash full loads• Air-dry clothes outside

Reduce “phantom” load

• Phantom load: When your electronics are off, they may still use power – power that you pay for!

• Home electronics account for about 15% of household electricity use.

• Use an Advanced Power Strip to shut the power off for you.

Switch to efficient lighting

• Lighting accounts for about 20% of annual household electricity bills, or approximately $200 per year.

• Replace incandescent lighting with compact fluorescent light bulbs (CFLs) or light emitting diodes (LEDs)

Choose ENERGY STAR®

• If you have an older refrigerator, it’s likely that it uses more electricity than any other appliance in your home – up to 12.5% of your annual use.– ENERGY STAR Refrigerators

can save you up to $100 per year on your electric bill

Maintain your heating system

• Whether you have a furnace or a boiler, proper maintenance is important.

• Seal ducts outside heated space

• Keep air registers clear

• Consider investing in a more efficient heating system

Images courtesy Efficiency Vermont

How buildings lose heat

Types of heat transfer

• Convection:Heat carried by moving air or fluid

• Conduction:Heat flows through solids

• Radiation:Heat flows through space as infrared light waves

• Warm air pushes upward through holes at the top of house

• Warm air leaks through the top, creating negative pressure that sucks in cold air through holes at the bottom

Stack effect drives convective heat loss

The building envelope

• Energy efficient homes are wrapped in a continuous “building envelope” that connects two barriers:– Air Barrier: Stops air leaks that are coming

through the attic and basement – aka “The Shell” or “Windbreaker”

– Thermal Barrier: Resists conductive heat loss – aka “The Sweater” – but is less effective if air flows through it

Air sealing creates an air barrier

Stops air leaks that are coming through theattic and basement –

“The Shell” or “Windbreaker”

Photo courtesy of GoAbout Photography

Common leaks in Vermont homes

Image courtesy of US EPA

Example of air leakage

• Air leaking into the attic wastes heat, melts snow, and causes roof ice. Moisture condenses and promotes mold growth.

Air sealing priorities

• Attic – you can stop warm air leaking out• Basement – you can stop cold air being

sucked in• Center level of house – can be tough to

work on and costly

Common leaks at the top of the house

Seal the attic hatch

• Weather-stripping is a cost-effective way to create a seal and insulate your attic hatch

Images courtesy of EnergySmart of Vermont

Seal plumbing penetrations

Images courtesy of Efficiency Vermont

Seal chimney bypass

Images courtesy of David Keefe

Common leaks at the bottom of the house

BOX SILL – RIM JOIST

Image courtesy of US EPA

Seal the bulkhead door

Image courtesy of EnergySmart of Vermont

• Seal with caulk or spray foam around rigid foam at:– junction of sill and foundation,– foundation windows,– plumbing and wiring penetrations,– and small cracks in the foundation.

Seal the box sills & foundation

Images courtesy of EnergySmart of Vermont

After Before

Insulation creates a thermal barrier

• Insulation helps your home resist conductive heat loss.

• “The Sweater” – but is less effective if air flows through it

Photo courtesy of GoAbout Photography

Conduction and R-Values

• R-values measure a material’s resistance to conductive heat transfer

• Materials with higher resistance to heat transfer have higher R-values (commonly called “insulation”)

• Materials with lower resistance to heat transfer have low R-values, such as glass, steel, concrete, wood, and wallboard

Add insulation• After air sealing, add insulation to

achieve recommended R-values, where feasible

• The thermal barrier (“Sweater”) should always be in contact with air barrier (“Windbreaker”)

Photo courtesy of GoAbout Photography

Add insulation

• Blowing cellulose fiber into closed cavities (wall, slant, floor) stops air movement and adds insulation in one step

• Insulating un-insulated walls and attics is one of the most cost-effective energy improvements you can make. Photo Courtesy of Vermont Dept. of Children and Families

Resources to help you Button Up

Taking action is as easy as A, B, C:

A: Get an Energy Audit/ Assessment– Choose the service that is right for you

• Weatherization Assistance Program• Home Performance with ENERGY STAR®

• DIY Home Performance

B: Button Up – Make the improvements

C: Cash In on incentives or rebates

What service is right for you?

• If you are income eligible, you should contact your local Weatherization Assistance Program to find out about free home energy improvements.

• When you participate in Efficiency Vermont’s Home Performance with ENERGY STAR® program, you work with a certified contractor and have access to incentives:– Professional Contractor– Do-It-Yourself

Vermont’s Weatherization Assistance Program

• Free diagnostic and improvement services for low-income Vermonters, operated by Community Action Agencies and other agencies

• See handout for income eligibility

• Call 211 – State hot-line

Home Performance with ENERGY STAR®

• Hire a participating contractor certified by the Building Performance Institute

• Eligible for up to $2,000 in incentives from Efficiency Vermont upon completion

• Visit www.efficiencyvermont.com to find a participating contractor

DIY Home Performance with ENERGY STAR®

• Homeowners work under the guidance of a participating contractor to complete the home energy improvements themselves

• DIY Program Participants receive: – Professional energy audit and detailed audit report – Direct technical assistance from contractor– Mid-term inspection after air sealing– Final inspection after completion of work by

homeowner

DIY Home Performance with ENERGY STAR®

• Participants are encouraged to work with a DIY contractor (list on Efficiency Vermont’s website)

• Eligible for up to $2,000 in incentives from Efficiency Vermont upon completion

• Homeowners pay for materials and contractor’s time.

What to expect from these home energy improvement services

• A BPI certified professional to guide your home energy improvements

• Air sealing and insulation• Heating system improvements and

recommendations• Moisture control and ventilation • Health and safety issues addressed

Why health and safety matter

• A BPI certified professional will test and correct any issues with:– Carbon monoxide caused by incomplete

burning – Moisture and mold which can cause health

and building problems. – Backdrafting: combustion gases coming back

in your house– Other health and safety issues

It all starts with getting an energy audit/assessment

An energy audit is a comprehensive evaluation of your home’s:– Air leakage,– Insulation levels– Heating system safety– Appliance efficiency and safety

An energy audit report includes:– Professional advice on ways to improve the comfort and durability of

your home with cost estimates– Assistance in prioritizing energy efficiency improvements to fit your

budget

Home energy audits average approximately $400/home

Energy audit

An energy audit will:• Find where air is leaking

– Using a blower door test to help quantify air leakage

• Prioritize air sealing– Start with the worst leaks

Image courtesy Energy Conservatory.

Energy audit

An energy audit will:• Look for areas of heat loss.

– This may include: • Using Infrared (IR) Thermography to

provide an accurate picture of temperature differences in your home or small business

A home in Williston, VT

Building Performance Program

• Have a small business or rental property?• Building Performance rebates will reduce the

costs of the audit and insulation upgrades• Efficiency Vermont offers up to $5,000 per

building to help pay for energy efficiency improvements

• Hire a participating contractor certified by the Building Performance Institute

• Visit www.efficiencyvermont.com to find a participating contractor

About renewable energy

• Efficiency first, then renewable energy• Solar energy: includes passive solar

design for space heating, hot water, and electrical needs

• Biomass – wood pellets and cordwood• Small-scale wind – limited applications• Incentives available from Renewable

Energy Resource Center at 877-888-7372

How do you pay for this?• Incentives from Efficiency Vermont pay for

a portion of the work. • Low-interest loans from participating

lenders (credit unions and banks) 4%-9%• NeighborWorks Alliance of Vermont: low

interest loans for income-qualified homeowners www.vthomeownership.org

• Practice no-cost energy conservation• Invest in low-cost efficiency options• Choose the home energy service that’s

right for you• Get an energy audit

Button Up to do list

Thank you!