Overall heat loss from the building is a sum of the losses of heat through
windows, doors, walls, roof, floors, basements, ventilation systems and infiltration. This
chapter specifically discusses heat loss through windows and sustainability techniques
that help improve bottom line.
Keywords: Window, window insulation, window replacement, U-value, R-value,
payback period, heat transfer, heat loss, cost of heating, cost of cooling, old
window, draft, draft cost, draft cost calculation, heat loss, heat loss across
window, type of window, window frame, argon gas effect, when to replace
window.
