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t-shirts winter t-shirts cold t-shirts leak t-shirts heat loss t-shirts exterior t-shirts door t-shirts window t-shirts house t-shirts building t-shirts heat t-shirts construction t-shirts insulation t-shirts diagnosis t-shirts energy t-shirts outdoors t-shirts

photographs winter photos cold photos leak photos heat loss photos exterior photos door photos window photos house photos building photos heat photos construction photos insulation photos diagnosis photos energy photos outdoors photos

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Thermogram of heat loss through exterior doors and windows during winter. The temperature scale runs from white (warmest) through red, yellow and cyan and black (coldest).