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2. Insulated glazing - Wikipedia

   en.wikipedia.org/wiki/Insulated_glazing

   A typical installation of insulated glass windows with uPVC frames. Possibly the earliest use of double glazing was in Siberia, where it was observed by Henry Seebohm in 1877 as an established necessity in the Yeniseysk area where the bitterly cold winter temperatures regularly fall below -50 °C, indicating how the concept may have started: [2]

3. Everest Home Improvement - Wikipedia

   en.wikipedia.org/wiki/Everest_Home_Improvement

   Everest was founded by Lewis Golden in 1964. [4] It became one of the first companies in the market of double glazing. [1] In what became a very fragmented market, [5] with over 3,000 companies, [1] the company grew to become the second biggest in the UK market by sales [1] and turnover [5] with 2.5% of the market (£165m sales) by 2009, [1] later rising to 3%.

4. Pella (company) - Wikipedia

   en.wikipedia.org/wiki/Pella_(company)

   The company was founded in 1925 when Peter Kuyper and his wife Lucille invested $5,000 to buy the Rolscreen Company, a small business that had created the Rolscreen insect window screen that rolls out of sight when not in use. [2] In 1926 they moved the company to Pella, Iowa, where the Kuyper family had a lumber business.

5. Andersen Corporation - Wikipedia

   en.wikipedia.org/wiki/Andersen_Corporation

   Andersen ranked #146 on Forbes List of America's Largest Private Companies, with $3 billion in annual sales for fiscal year ending December 31, 2021, [1] [3] and #185 on Forbes list of America's best large employers in 2022. [4] Andersen Corporation and its affiliates make up the largest window and door manufacturer in North America. [5]

6. Lever House - Wikipedia

   en.wikipedia.org/wiki/Lever_House

   The curtain wall cost $28,000 more compared to normal sash windows, while the double glazing cost $135,000 and the window-washing equipment cost $50,000. However, the air conditioning system saved $90,000 in upfront costs, and it also saved $3,600 per year on energy costs and $1,000 per year on costs caused by hot and cold air escaping.

7. Window insulation - Wikipedia

   en.wikipedia.org/wiki/Window_insulation

   Clear double glazing has a U-factor between 1.8 and 3 W/(m 2 ⋅K) or between 0.3 and 0.5 Btu/(h⋅ft 2 ⋅°F) (about R-2) Clear triple glazing has a U-factor between 0.5 and 1 W/(m 2 ⋅K) or between 0.1 and 0.2 Btu/(h⋅ft 2 ⋅°F) (about R-3). Double and triple glazing are critical for energy efficiency. Single glass windows are no longer ...