Double hung windows have two locks.
Double hung vs single hung windows.
A double hung windowis similar in looks to a single hung but includes two sashes or operational panels which can give more versatility.
Mainly because they contain less moving parts and are easier to manufacture.
A single hung window is different from a single pane window.
The difference is that with single hung windows only the bottom sash moves and the top half is permanently fixed.
With double hung windows both sashes slide up and down.
Both single hung and double hung windows have two sashes an upper and lower sash which separates the window both physically and visually.
However they cost more to install and repair.
The less openings there are for heat to go out the more energy is saved.
A single hung windowis one of the oldest and most popular varieties.
The term single hung refers to the fact that the window has a single sash or operational panel.
A sash is the square or rectangular frame containing the window glass and may include smaller pieces called muntins that divide the glass.
Single hung windows which cost less are more common particularly in older construction but they are harder to clean.
There are fewer moving parts whereas a double hung requires more work to ensure airtightness.
Single hung windows have the top sash fixed in place so only the bottom sash can be moved up.
Single hung windows typically cost less than double hung windows.
Installation is often cheaper for a single hung window.
Double hung windows allow both the bottom and the top sash to move so you can have two sashes open at.
Double hung windows allow for greater ventilation flexibility and are easier to clean.
Single hung windows are considered to be more energy efficient due to the unmovable top sash.