Adriana Galue Wolfgang Custom Finishes 2008

HOME ENERGY STATS Biggest energy consumers Space heating – 34% Appliances and lighting – 34% Refrigerator – 8% Water Heating – 13% Electric A/C – 11%

Energy Losses Conduction loss through solid materials Wet ground increases conductive loss (water great conductor of heat) Conduction and radiation loss through framing and window frames Convection forces air out roof (light fixtures, ceiling fans, etc)

First Step – Gather Info Home Energy Audit Figure out where energy is being wasted ($300 - $500) Look at utility bills Ask about your concerns, comfort issues Visual inspection (top to bottom) look for leaks, Check for insulation, Inspect windows, Inspect appliances Perform blower door test / IR – how leaky is the house A good rating is 1000 – 1500 CFM Perform Duct blast test - May lose 35% of heat through ducts Make recommendations and hire professional retrofitters

Second Step - Weatherize Seal leaks Caulk all leaks / Seal windows and doors, outlets, plumbing penetrations Seal ceiling penetration (recessed lighting, attic access doors) HOW TO SEAL Large leaks use backer rod (larger than 3/8”) Liquid foam (window and door installation, gaps and cracks 1/8” – ½”, Big Gap – ½” – 1”) Caulk – Silicone is the best Weather stripping – many types depending on application Light switch / outlet cover gaskets Door Sweeps Seal HVAC Ducts with Mastic sealant

Third Step - Insulate ONLY INSULATE AFTER SEALING AND INSTALL CORRECTLY Reduce heat loss - Attic 30%, Walls 16-20%, Floors 5-15%, Foundation, Windows Call building department for code and increase by 30% Call local builders, check EPA energy star Where to use Attics – loose fill, blankets, liquid foam Walls – loose fill, blankets (if new), liquid foam Floors – Blankets (moisture barrier against floor) and liquid foam Foundations – rigid board rated for burial Exterior sheathing – roofs and exterior walls

Fourth Step - Windows Plastic window coverings –reduce air infiltration Internal and external storm windows – made of plastic or glass Insulate - Create an airspace between window and storm window Window replacement - Very expensive Casement windows best option Want Low U factor - reciprocal of R value, want 0.3 or lower double pane better to reduce conductivity of heat low-e coating (low emissivity) – microscopically thin layer of tin of metallic oxide that reduces heat flow gas filled (argon or krypton) – increase R-value by 0.5 type of sash (not metal, want wood, vinyl, or fiberglass) warm edge space to insulate edge of class heat mirror film (like a third pane) low infiltration (air-tight) - Want under 0.3 Want higher condensation rating (between 0-100) heat gain coefficient to match application - want 0.4 to 0.55 or higher in intermediate climates good visible transmittance (clear glass = 90%), want over 60% energy star qualified

Fifth Step - Other Energy Star appliances (water heater first) Minimize lighting –CFL’s, LED’s Behavioral changes (hand-wash dishes, clothes line) Use radiant barriers / window shades Natural ventilation Utilize fans to cool vs mechanical cooling Programmable thermostat Reduce Phantom loads

Conclusion Always go for energy efficiency prior to renewable energy technologies Simple projects can add up to great savings Look at projects that can do on own with simple materials and a little labor