MG-350 Horizontal Sliding Window

Yes. Even as a value-tier product, the MG-350 HR is LMI (Large Missile Impact) rated and approved for HVHZ installations at 65 psf positive and negative design pressure. It carries Florida Product Approval FL41890.R2, so we can install it in Miami-Dade and Broward. We'll confirm the rating applies to your specific opening at quote.

The MG-350 HR is available as a two-panel OX or XO window up to 83.625 inches wide by 63 inches tall, or as a three-panel XOX up to 111.625 inches wide by 63 inches tall. Both are rated to +65/65 psf design pressure. We confirm which configuration and size fit your opening during the site measure.

Both are impact-rated aluminum horizontal sliders, but the MG-350 HR is the value tier rated to 65 psf, while the MG-300 is rated to 140 psf and reaches larger sizes. The MG-350 HR tops out at about 111.625 inches wide (XOX) versus roughly 127 inches on the MG-300. If your wind-load requirements or opening size exceed what the MG-350 HR offers, we'll point you to the MG-300. We confirm the right fit based on your design pressure requirements.

The MG-350 HR uses a laminated impact makeup (1/8" heat-strengthened glass, .090" PVB interlayer, 1/8" heat-strengthened glass) and offers tints including Clear, Gray, Bronze, Solargray, Solex Green, and Low-E. The most heat-rejecting option is the 5/16" Laminated Gray with Solarban 70, at SHGC 0.273 and U 1.077, versus SHGC 0.619 for the standard Laminated Clear. We'll help you pick the glass that balances energy savings and budget at quote.

As the value tier, the MG-350 HR is one of Mr Glass's more economical impact sliders, but installed pricing still depends on the size, whether you choose the OX/XO or XOX configuration, the glass package, and the condition of the opening. Adding a Solarban 70 Low-E build raises the cost over standard clear laminated glass. Armor Pro provides a free estimate so you get an accurate price for your project.

Mr Glass runs a deep catalog, and we install across most of it. On the residential side that means impact windows in single-hung, horizontal-roller (sliding), fixed picture, and casement and awning styles, plus a full range of doors: entry and outswing doors, architectural pivot doors, and sliding glass doors including the multitrack pocket slider. They also build a commercial line of impact and non-impact storefronts, window walls, curtain walls, glass railings, and aluminum louvers that we handle on light-commercial projects. We help you match the right Mr Glass product to each opening and pull the matching approval for your county.

Most of the line is, but it depends on the specific product. Mr Glass's premium residential windows are dual-certified to both Large Missile Impact (LMI) and Small Missile Impact (SMI), which covers them for high-rise and coastal work anywhere in the High-Velocity Hurricane Zone of Miami-Dade and Broward. Their value-tier windows and all of their doors carry the impact certification needed for the HVHZ as well, and a couple of commercial products (the MG-275 door and MG-4500 storefront) are non-impact and are not used in the wind-borne-debris zone. We confirm the exact product, rating, and approval for your address before we quote and permit.

A horizontal roller opens side-to-side on a track instead of up and down. It is a practical choice for wide openings, over kitchen sinks, and anywhere a vertical sash is awkward, and it gives a large clear view with an easy one-hand operation.