
Home with large expoanses of glass can bring in light and warmth in the winter but cvan aslo make it expensive for A/C to kleep cool in the summer. Keeping heat out is a great way to keep the A/C bilss and cost down.
" ... to keep out the summer sun and keep your energy bills down, consider making a DIY insulation panel ... using reflective material to keep the scorching sun out ... constructing simple wooden frames and stretching reflecting insulation over them, ... five huge panels cost under $200 and took five hours to build."
Via: LifeHacker LINK
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