ironing board under cover_ironing board cover 15 x 48

One of the key features of insulated window units is the use of multiple panes of glass with a layer of insulating gas between them. This design helps to reduce heat transfer through the windows, keeping the indoor temperature more stable and reducing the need for heating and cooling. The insulating gas, usually argon or krypton, is a poor conductor of heat, further improving the windows' energy efficiency.