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FAQs
  1. What is the difference between Tilt‘N’Slide™ and Parallex™ hardware systems?
  2. What are the sash size limitations with the Parallex™ hardware system?
  3. Does Preferred Engineering Products Ltd. make windows?
  4. Can Preferred Engineering Products Ltd. help my company design and test a new window?
  5. I use Tilt‘N’Slide™ hardware in my existing line of windows, but want to improve my productivity even further. What can I do?

Q: What is the difference between Tilt‘N’Slide™ and Parallex™ hardware systems?

Tilt‘N’Slide™ was designed to let window sashes open inward ("tilt in") so that the exterior glass could be easily cleaned safely from inside the home. It offers a window manufacturer greater flexibility to make tilt in slider windows from profiles originally designed for double hung windows. It is designed for tilt in slider windows only.

Parallex™ is designed to let manufacturers make either casement, tilt in slider or double hung windows. This helps minimize the various number of hardware inventory items to keep on hand if more than one window style is being produced.


Q: What are the sash size limitations with the Parallex™ hardware system?

Parallex™ sash sizes for the various windows styles are as follows:

  • Casement: minimum 12 inches wide to maximum 36 inches wide. Maximum height is 72 inches.
  • Tilt in Slider: minimum 12 inches to maximum 74 inches wide. Maximum height is 62 inches.
  • Double Hung: minimum 12 inches to maximum 49 inches wide. Maximum height is 74 inches high.


Q: Does Preferred Engineering Products Ltd. make windows?

No, we do not manufacture windows. We do, however, understand how windows work. Through this understanding, we constantly research ways to improve how windows can be operated more efficiently and easily.


Q: Can Preferred Engineering Products Ltd. help my company design and test a new window?

Yes we can. We know hardware. We know windows. More importantly, we know how our hardware will make a window perform to its maximum capability. Since 1990 we have been advising customers how to improve their windows through better design. Our staff of engineers has over 15 years of combined experience designing and manufacturing award winning hardware.

In short, we know what it takes to go from concept right through to installation of windows. With complete 3D software design equipment and in-house testing facilities, Preferred has what it takes to design a window quickly and accurately so that you can meet your customers’ needs and stand apart from your competition.


Q: I use Tilt‘N’Slide™ hardware in my existing line of windows, but want to improve my productivity even further. What can I do?

To help you save time we have available two production jigs to help speed up the hardware installation process.

The SR6 drill jig is designed to give you consistently accurate placement of the Sash Retainer attachment on your window sash.

The ALX-001 assembly jig allows you to set all the hardware assemblies to the exact sash length according to the window breakdown, all at the same time. This eliminates wasted time in sizing and adjusting the assemblies individually.

Preferred Engineering Toll Free: 1-800-387-5835