Designed for Efficiency
Some window designs are inherently more efficient than others. The most common types:
- Double-hung windows: These are traditional units in many homes across the country, and they’re especially common in pre-war buildings. With double-hung windows, the bottom slides up to open the unit. They can be efficient choices, but in really extreme climates, they may not be the best option because of the potential for air intrusion between the sliders.
- Casement windows: Popular in climates where wind is an issue, these units, which have a crank that swings the window outward to open, actually seal themselves off tighter when wind blows in toward the house. They do require maintenance on hinges and seals, however, to ensure their continued stability and efficiency.
- Picture windows: These usually don’t open and come in many different shapes and sizes, but that doesn’t mean they can’t be efficient — glass choice and gas-filled interiors are especially important in these larger units.