An Efficient Window

The efficiency of a window will depend on all the parts that make up the window. The frame of the window is a conductor of heat, which forms part of the efficiency overall. This applies also to the windows U-factor. The technical side of the glass and glazing industry has become really advanced in recent years, with some design professionals demanding glass or glazing that will suit various designs and climates etc. London Glazing know the details for all types of glass. An important consideration is how the windows actually work, as some working types have a lower rate at which air can leak air than others, this improves your home’s energy efficiency.

Normal operating types are:

Awning:
Uses hinges at the top and opening out. Because the sash closes by pushing against the frame, they usually have low air leaking rates. Lower than sliding windows. London Glaziers fit these.

Casement:
Hinged on the sides. Look similar to an awning window, they generally have lower air leakage rates than a sliding window as the sash shuts by pushing against the frame.

Fixed:
Fixed panes that will not open. Once installed properly these windows are airtight, however, they are not suited in areas where window ventilation is required.

Hopper:
Hinges at the bottom and opening in. Just as with both awning and casement windows, these usually have low air leak rates as the sash shuts by pressing against the frame.

Single and Double-Hung:
Each of the sashes moves vertically in a double-hung window. The bottom sash is the only one that slides up in a single-hung window. These sliding windows generally have high air leak rates than projecting or hinged windows.

Single and Double-Sliding:
Each sash moves horizontally in a double-sliding window. There is only one sash that slides in a single-sliding window. As with single and double-hung windows, they usually have high air leak rates than projecting or hinged windows.