What Double Hung Means and How They Work
It should be noted that a hung window means that the sashes are mounted within the frame and are engineered to open vertically. When it comes to hung windows, you’ll hear the terms single hung and double hung. This blog highlights some of the benefits of double hung windows.
Single or double hung refers to whether one or both sashes are operational. These days, single hung windows are mostly found in historical homes. Single hung windows are when the top sash is fixed and only the bottom sash is operational. If offers ventilation when the bottom sash is slid up and over the fixed sash within the frame. The window stays open by use of a counterbalance system.
The Benefits of Double Hung Windows
- Air Flow
Double hung windows became the preferred option when it was determined that they could provide better ventilation than single hung windows alone. Before air conditioning, warmer months would be stifling indoors without a steady supply of fresh air. It was theorized that because hot air rises, having two operational sashes could improve air flow. When some of the windows are opened at the top it allows hot air to escape; and when other windows are opened at the bottom, it allows cooler air to enter and circulates the air flow. Many homeowners still use this method to save energy to cool their homes.
Having a window open at the bottom with a child or pet can present a safety concern. Having the option to open a window at the top, out of reach, can reduce the risk of accidents.
Having both sashes operational means that both can be tilted in for easier cleaning. Single hung windows require that the fixed, top sash is cleaned from the outside.
To see how Jantek’s EnergyMiser Double Hung windows operate, visit the product page.
Here, you can view a video demonstration as well as the energy performance ratings that include a U-Factor of .18 and a R6 Insulation Value.
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