Double Hung
Picture Window
Window Trim Options
Window Statistics


TRI-MAX Slider

Replacement Window

SWS's most energy efficient window with triple glazing, boasting a .22 U-Value, .26 SHGC & DP 40 standard

SWS’s most energy efficient window with triple glazing, boasting a .21 U-Value, .23 SHGC & DP 30 standard

(a DuraGard XT product)

Replacement Windows:  Awnings  Casements  Double Hung  Picture  Product Inquiry  Shapes  Slider


The Tri-Max triple pane glass window (a DuraGard XT product) is the top of the SWS line.

The basic window frame, sash, features and benefits are all the same as the DuraGard XT slider with the exception of the glass which is 1″ thick.
The window profile is only available one way:
3 panes of glass
2 argon filled airspaces
(low e-argon-clear glass-argon-low e)
This OFFSET AIRSPACE is a SWS Tri-Max window special feature which allows the Tri-Max window to achieve an energy efficient of .21 U-Value with or without grid.

Due to the double low e-glass these windows will have a darker tint that our normal window lines.



Exterior glazed sash
Super Spacer warm edge spacers
Fully welded sash keeps sash permanently square & true
Exclusive! Heavy Duty extruded aluminum screen (full or half screen)
1″ Insulated Glass decreases thermal energy loss
Fully welded beveled 3 1/4 frame


Specialty Wholesale Supply (SWSS) is the Maki Corp MANUFACTURING DIVISION. SWS is a leading manufacturer of quality vinyl windowsexterior doors, interior doors,  patio doors,custom millwork at the Mill Shop, metal fabrication, screen enclosures, countertops, vinyl railing, vinyl fencing, and trusses.




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About SWS

SWS was founded in 1969. Products can be purchased through MAKI Building Centers in Lunenburg, Gardner, Sterling or directly through the SWS manufacturing complex featuring several manufacturing plants and centrally located in Gardner, Massachusetts.  As a family-owned business, we strive to make your shopping experience unique, informative, and personal.  SWS caters not only to architects, builders, and contractors, but also homeowners in Central New England.

The SWS staff enjoys working with you on your project whether your needs are large or small.     Contact us for more information.     Quote Request.


TRI-MAX windows (A Duragard XT Product) are:

Made to Order
Made to Fit
Made to Last
Call (866) 416-3916
Measuring Window Openings
Tip -To – Tip

When given a TTT measurement SWS will use the exact width and height dimension furnished, no deductions.   You window will be made that exact size.  Please measure carefully as customer-furnished measurements are the customer’s responsibility.

Measuring by the opening size

Pertains to an existing window frame where sash has been removed but the window frame has been left in place to house the new unit.  SWS when given an opening size dimension we will deduct 1/4″ off  the width and 1/2 ” off the height of dimension to allow room to square up the opening after installation.

Determine united inch

To determine united inch, add the height and the width.  If you have any questions, please do not hesitate to call SWS for answers.    Download replacement window measuring sheet.


TriMax Replacement Interactive Window – Slider

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