For window units that require total historical authenticity, Weight & Chain configuration may be required.
While these units are more expensive and require the added space for weight boxes when compared to a similar concealed spiral balance unit, they require less physical force to operate. W&C hardware has been time tested to last over 100 years in some cases.
Concealed Spiral Balance units do not require the space for weight pockets and are less expensive than weight & chain windows.
Spiral balance windows do have some limitations however. While not a problem in standard sizes, a heavy sash can exceed the weight limitation of available balances. A concealed spiral balance window also requires more physical force to operate compared to a weight & chain unit.
When originally invented to allow for easier sash operation, hung windows did not have a balance system. Later, weight & chain hung windows were conceived to make raising and lowering the operating sash much easier. Today, hung windows are also available in concealed spiral balance configuration for single & double hung windows. Careful consideration will allow you to choose the best window for your project.
Historical buildings with hung windows were designed to accommodate the space required for weight pockets. Additionally, for projects in a historically managed setting, weight & chain windows may be required for historic window replacements.
There are several advantages that weight & chain windows have compared to concealed spiral balance hung windows:
Weight & Chain Disadvantages:
Concealed spiral balance window units represent an economical alternative to weight & chain hung windows. These windows are utilized in all types of applications including historical, depending on the exact criteria of the project.
Concealed spiral balance hung windows similar to those provided by Parrett facilitate sash operation through sash balances that are hidden from view and installed in the side jambs of the window. Typically these units are less expensive than comparable weight & chain hung windows. Concealed spiral balance windows also provide the following benefits:
Concealed spiral balance hung windows similar to those provided by Parrett facilitate sash operation through sash balances that are hidden from view and installed in the side jambs of the window. Typically these units are less expensive than comparable weight & chain hung windows.
Concealed spiral balance windows also provide the following benefits:
Spiral Balance Disadvantages:
Click Here to download a PDF of this document for desktop viewing and/or printing.
Disclaimer: The information provided here is general in nature and is subject to change. These blogs are provided for general information only and do not necessarily serve as a recommendation for your specific project. Please contact us at firstname.lastname@example.org to discuss your specific project in further detail.