Modern plastic windows is no luxury but a necessity. Just this way the warmth stays in the large farm building in frosty winter. When the insulation is insufficient, the stove heating used there not only requires continuous work of a fireman and cleaver. But also implies expenses due to high firewood consumption.
Plastic windows in cats house were installed during its construction. Cats are known to be less cold tolerant than dogs. Other premises were equipped in year 2010.
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