Thermo-Twin windows include insulated glass for enhanced efficiency. All insulated glass units are manufactured at Thermo-Twin using state-of-the-art Lisec equipment and incorporating the Super Spacer® glass sealing system.

V700 slider windows are ideal for just about any home. Featuring everything from aesthetic elements to professional-grade glass, our V700 slider windows are the quality products you’ve been looking for. Learn more about the V700, and contact a Thermo-Twin representative to schedule your free estimate.
Thermo-Twin windows include insulated glass for enhanced efficiency. All insulated glass units are manufactured at Thermo-Twin using state-of-the-art Lisec equipment and incorporating the Super Spacer® glass sealing system.
Thermo-Twin windows are equipped with first-in-class Super Spacer® technology. For the homeowner, this means quality and energy efficiency. Super Spacer® technology reduces condensation and makes for a quieter window product. Made of silicone materials, Super Spacers® are superior to their metal counterparts and help us to create some of the most energy-efficient insulated glass systems on the market.
The specific type of glass for your windows varies by taste and application. Glass packages can be ordered in a variety of types, including Energy Efficient Low E, Clear and Tinted Glass. A standard glazing package is available, as well. The standard model is our Comfort Select 36 Soft Coat Low E, which is filled with Argon Gas.
Internal window grids aid in the stability of and appearance of your new windows. Internal grids are available in a variety of colors to match both the exterior and interior of your windows. Window grids are located inside of the glass, allowing for easy cleaning of the glass surface.
In choosing an internal grid design for your custom windows, you have several options. Grids are available in four unique styles:
You put a lot of care and thought into the look of your home; we do the same with our windows. That’s why V700 slider windows offer various aesthetic features, such as a beveled exterior. These windows are offered in both equal-lite and non-equal lite configurations, and function perfectly as either replacement or new construction windows. For new construction, each window includes a pre-punched nailing fin for easier installation.
V700 slider windows are constructed with a sliding window sash for full functionality. The V700 uses the Heritage sash design, which resembles the interior of a wood sash. Using fusion welding, we ensure that the sash is squared so that your new windows fit perfectly into the opening in your home.
Thermo-Twin’s V700 slider windows are crafted with precision and are strong enough to stand the test of time. The V700 slider series of windows incorporates the use of an overlap for a clean fit and finish with the window jamb, as well as integrating composite reinforcement by Chelsea to ensure maximum product strength. And for customization, our slider windows have subtle accessory grooves to allow you to install trim or any of our selection of compatible window accessories.
Quality glass components make your windows stand out. Thermo-Twin’s V700 slider windows comes standard with 7/8” insulated glass, secured into the sash with silicone glazing. Customization is always an option as well, as we have a variety of glass packages available to use with the V700 model.
Energy efficiency is an essential consideration when choosing new window products. V700 slider windows are designed to help you save on utility bills. Silicone glazing on the window sashes minimizes air, water and insect infiltration. Further combating air infiltration, the V700 has dual weather stripping at the stiles, interlock, head and sill of the window. All V700 slider windows come standard with a half screen for proper airflow (full screen available upon request).
Each of our two section slider windows comes equipped with a variety of features. The standard model is available with either a half screen or full screen. These vinyl windows have a default functionality with the right panel sliding from right to the left as viewed from the inside; however, this is customizable to slide in the opposite direction.
This three section window model is ideal for many homes and offices. The 1/4-1/2-1/4 option is designed with a stationary center section, as well as two flanker panes to each side. Each flanker is equipped with a screen for ventilation.
Our Equal Lite windows are customizable to your needs—available in both a standard and alternate configuration. The standard model is designed with a fixed center pane, sliding flankers on each side and protective screens for each flanker pane. In our alternate configuration, the center pane—equipped with ventilating screen—slides, while each flanker is stationary.
Thermo-Twin windows are equipped with first-in-class Super Spacer® technology. For the homeowner, this means quality and energy efficiency. Super Spacer® technology reduces condensation and makes for a quieter window product. Made of silicone materials, Super Spacers® are superior to their metal counterparts and help us to create some of the most energy-efficient insulated glass systems on the market.
Our expertly-crafted vinyl windows are second to none in strength and quality consistency. Each window incorporates multi-chamber vinyl construction, affording them an unparalleled level of strength and energy efficiency.
Throughout the manufacture of our vinyl window products, we implement four (4) point welding techniques. Each of our master frames and sashes are completely welded on four point welders, enhancing the strength of the hardware. This process allows for consistency in the manufacturing process and guarantees a completely squared window.
At Thermo-Twin, we take pride in the quality and craftsmanship of every window that crosses the assembly line. Product quality begins with quality materials. Each of our multi-chambered extrusions are manufactured from 100% virgin vinyl (NEVER recycled), permitting low maintenance and providing outstanding strength and rigidity. Welded frame and sash corners provide extra strength for lasting durability and smooth operation.
Thermo-Twin windows are secured and made weather safe with the use of top-of-the-line sealants, guaranteeing stability. All of our insulated glass units are affixed to the sash by using silicone glazing. Silicone provides for a strong, weather-tight seal of the glass into the windowsashes.
Thermo-Twin offers three standard exterior colors for vinyl windows:
As it is the most flexible option and matches just about everything, our “Bright White” is by far the biggest seller in all of our markets.
*Colors are approximate, see sample for exact color.
We know that all homes do not fit one particular mold. That’s why Thermo-Twin offers eleven custom colors for all vinyl windows. To match your décor and overall color scheme, your color choices include:
You can mix and match colors for the interior and exterior of your window.
*Colors are approximate, see sample for exact color.
If you have a more natural or rustic look in mind, we have you covered. In addition to flat colors, Thermo-Twin offers three interior wood grain finishes for all vinyl window products. Stand out with sleek wood grain finishes:
The exterior of your window can be any Vinyl Standard or Custom color.
*Colors are approximate, see sample for exact color.
Thermo-Twin is committed to your safety. We use hardware in the construction of our window products that is lead free in accordance with EPA standards. Materials are made from composite materials and do not incorporate the use of lead paint. We do this in an effort to limit human exposure to lead toxins that could otherwise be absorbed by repeat contact with components like window latches.
Fast and easy operation of your vinyl window products is a must. At Thermo-Twin, our windows are equipped with necessary hardware to maximize ease of use.
Our vinyl windows incorporate coil spring Constant Force Balance Systems by Amesbury. These components permit for smooth and effortless operation of our windows.
The Constant Force Balance System is only available on vinyl double hung windows.
The locks and latches on your vinyl windows help to protect your home from both a security and energy efficiency standpoint. Each of these components in Thermo-Twin windows is created to enhance the functionality and aesthetics of the product, from materials used to color.
Thermo-Twin uses only the finest lock products for our windows. Each of our windows incorporates the use of Cam Action Sash Locks. These locking mechanisms create a secure, positive fit of the window sashes at the lock rail, guaranteeing enhanced security and air-tightness to boost energy efficiency.
Our sash locking hardware is constructed with the highest quality materials. Thermo-Twin windows incorporate locks that are manufactured using composite materials. By using composites, our locks have a lightweight construction, greater overall strength, longer product life and are non-corrosive.
Thermo-Twin windows include insulated glass for enhanced efficiency. All insulated glass units are manufactured at Thermo-Twin using state-of-the-art Lisec equipment and incorporating the Super Spacer® glass sealing system.
Thermo-Twin windows are equipped with first-in-class Super Spacer® technology. For the homeowner, this means quality and energy efficiency. Super Spacer® technology reduces condensation and makes for a quieter window product. Made of silicone materials, Super Spacers® are superior to their metal counterparts and help us to create some of the most energy-efficient insulated glass systems on the market.
The specific type of glass for your windows varies by taste and application. Glass packages can be ordered in a variety of types, including Energy Efficient Low E, Clear and Tinted Glass. A standard glazing package is available, as well. The standard model is our Comfort Select 36 Soft Coat Low E, which is filled with Argon Gas.
Internal window grids aid in the stability of and appearance of your new windows. Internal grids are available in a variety of colors to match both the exterior and interior of your windows. Window grids are located inside of the glass, allowing for easy cleaning of the glass surface.
In choosing an internal grid design for your custom windows, you have several options. Grids are available in four unique styles:
At Thermo-Twin, we’re dedicated to providing advanced, energy efficient windows. All of our windows are Energy Star certified as a reflection of our environmental friendliness, quality of construction and insulation. To provide our customers with superior, efficient vinyl window products, we use the latest technology: Super Spacer® by Quanex.
There is a limited lifetime warranty which is transferrable to a second owner.
Ease of cleaning plus you have the option of opening only the top sash for ventilation.
Simple answers are “strength” and “energy efficiency”. With a welded master frame and welded sashes there are no seams for air or water penetration plus the welded corner is superior to any screwed together corner.
By far it is our “bright white” color in all of our markets. While other companies offer a “dull” white, we at Thermo-Twin take pride in manufacturing a “bright white” window which will look white for years to come.
Vinyl has proven itself to be a very cost effective and efficient manufacturing material. Thermo-Twin uses only 100% virgin vinyl which has a lifetime warranty against cracking and peeling. Other manufacturers cut corners by using “reground” or “recycled” vinyl since it considerably less expensive. The problem with that material from our tests is that it does not provide the years of beauty, quality or performance that a window manufactured from 100% virgin vinyl provides. With 100% virgin vinyl you are getting a 100% pure material which has been proven to stand the test of time.