The ability to create an elegant and expansive living space by joining the indoors with the outdoors, make our 75 series aluminum Bifold Doors And Windows so special and desirable. Designed to effortlessly stack and fold against the side walls, these bifold doors and windows provide an unobstructed view from corner to corner, opening your home to infinite vastness. Most importantly, bifold doors can replace walls that enlarge your patio and even kitchen view and give you the ultimate indoor-outdoor lifestyle. It allows fresh air and natural light into any space that of course fits the requirements. Besides, bifold doors and windows consist of single or multiple glass panels that fold back and are easy to open and close. And, Eris’s window are made of thermal break aluminum with 2″ frame width and 5mm tempered glass with safety film.


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We use Title-24 regulated bifold door glass with a 0.29 U-Factor and 0.23 SHGC.


Our prices are competitive and more affordable than other suppliers. Take a look!


Our bifold doors come with a multi-point locking system for highest security.

Easy To

A smart design, makes our bifold doors easy to install with our installation guide.

Bifold Features + Details

40 - Years



75 - Series

Thermal Break



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Eris bifold doors will come with a multi-point locking system and has a cylinder lock. As a matter of fact, this kind of lock is a cylinder that runs through the center of the lock and into the door, therefore inside the cylinder is a pin-and-tumbler mechanism that can only be manipulated with the correctly shaped key. Without the right key, the pins won’t move and enable the lock to turn.

Our bifold doors come with 6-point lock and 8-point lock dependING on size of door and panels.


This is possibly the most common and attractive locking system for bi-folding doors. In additon, it is built around a handle at the center of your doors that will operate locks at the top and bottom, holding the doors in place when engaged.


These are typical dropbolt locks that are affixed to the top and bottom of your doors and will add an extra layer of protection. However, We do not recommend relying on them as your only source of security.


These will most likely be the system installed with your bi-folding doors as standard and, in the vast majority of cases, is more than satisfactory. They can be controlled either with a key or with an internal, twisting locking mechanism.

Glass Options.


Double tempered glass filled with argon gas.

Laminated filtered glass with argon gas
E Glass – 100% block UV (Type A & B) filled with argon gas
Tinted tempered glass filled with argon gas
Safety tempered glass filled with argon gas


Benefits of Argon Gas in Bifold Doors And Windows

Almost all thermal windows today use some type of gas fill, so the benefits of argon are similar for most new thermal windows

Improves U-value, the measure of a window’s thermal performance; similar to the R-value of wall insulation

Enhances soundproofing characteristics

Minimizes heat exchange through the window

Reduces the possibility of condensation and frost

Can be used in all climates

Can be combined with low-E coatings for optimal window performance

Available in residential and commercial window sizes and styles

Does not corrode window material as oxygen will

Does not contaminate the environment; non-toxic gas

U-Factor and Solar Heat Gain Coefficient

Title 24, part 6, of the California Code of Regulations, sets energy efficiency standards for residential and non-residential buildings. If you’re building a new home, you should consider buying the most energy-efficient doors possible. When selecting doors for energy efficiency, it’s important to first consider their energy performance rating in relation to the local climate.

Look for a low SHGC in a climate that mainly requires cooling and a high SHGC in a climate that requires heating. The range is from 0 to 1. SHGC measures how well a product keeps out solar heat. Look for a low U-factor; the range is from 0.00-2.00. The lower the U-factor, the better the door keeps in heat.

The newly updated California code for residential fenestration requires U-factor ratings of 0.30 or better and Solar Heat Gain. Coefficient (SHGC) ratings of 0.23 or better.


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