Hollier’s Home Improvement proudly uses Envirosealed Windows™, which stands between you and the extremes. From the hottest summer to coldest winter, count on our energy-efficient products to weather the worst of temperature, wind, precipitation and UV exposure. You'll experience a more comfortable home environment, improved energy conservation and the resulting cost savings. Windows account for up to 25 percent of your home's energy consumption. Envirosealed Windows™ are filled with non-toxic Argon gas, which insulates better than air.