Dometic S4 1100x450 Hinged Window

A Dometic S4 1100 x 450mm top-hung hinged caravan and motorhome window, with double acrylic glazing, a polyurethane frame, and an integrated fly screen and blackout blind.

Why This Product

If your caravan or motorhome's 1100x450 window has cracked, yellowed, or started leaking around the seal, a genuine Dometic S4 replacement restores a weathertight, insulated opening without having to modify your existing cut-out. It's a well-documented standard size in the Dometic S4 range, so blinds, flyscreens and seals stay available if you ever need spares later. For Western Cape touring, from hot coastal days to cold nights inland, the friction-hinge design lets you hold the window open at whatever gap suits the weather, and the built-in blind and flyscreen mean you're not sourcing those separately.

Key Features

• Double acrylic glazing set in a polyurethane frame for thermal insulation
• Integrated pleated fly screen for insect protection
• Built-in aluminium-coated darkening/blackout blind, adjustable independently of the flyscreen
• Top-hung hinged opening on friction hinges that hold the sash open at any position, not just fixed vent stops
• Safety catch that prevents the window being opened from outside
• Straightforward installation using the S4's trimmable inner frame

Ideal For

• Replacing a cracked, yellowed, or leaking 1100x450 window of the same nominal size
• A caravan or motorhome renovation where old single-glazed windows are being upgraded
• Insurance or accident repairs needing a like-for-like Dometic S4 replacement
• Builders fitting out a new trailer or camper shell to the S4 window standard

Local Support from 4Matt Campers

We stock and supply the Dometic S4 range from our base in Bellville, Cape Town, serving customers across the Western Cape and beyond. Caravan and motorhome window swaps live or die on the cut-out size, so measure your existing opening carefully and contact us to confirm fitment before you order.

Technical Specifications

• Nominal size: 1100 x 450 mm
• Opening type: Hinged (top-hung)
• Glazing: Double acrylic glazing
• Frame material: Polyurethane
• Standard inclusions: Integrated fly screen and built-in darkening/blackout blind
• Wall thickness range (S4 range, typical): Approx. 26-41mm via trimmable inner frame - confirm against your own panel
• Security: Safety catch prevents opening from outside

What's Included

• Dometic S4 1100x450 hinged window unit - polyurethane frame with double acrylic glazing
• Integrated pleated fly screen
• Built-in aluminium-coated darkening/blackout blind

Optional Fitment / Upgrade Notes

The 1100x450 in the title is the Dometic S4's nominal size - always measure your existing cut-out/rough opening and compare it to your current window before ordering, since a mismatch of even a few millimetres means it won't seal. The S4 range is built around a trimmable inner frame that typically covers wall thicknesses from roughly 26mm to 41mm, so check your panel thickness falls in that range. A hinged S4 also needs clearance for the sash to swing open, so check that an awning arm, roof rack, or nearby fitting won't foul it when open.

Complete Your Setup

Renovating more of the caravan? See the rest of our Dometic hinged and sliding window range. · Need seals, catches, or other fittings to go with it? Browse caravan and trailer spares.

FAQ

Will this fit my caravan's existing window opening?
Only if your cut-out matches the S4 1100x450 frame size - measure your existing opening and contact us to confirm before ordering, as we can't guarantee fitment from the nominal size alone.

Does it come with a flyscreen and blind?
Yes - this Dometic S4 window includes an integrated pleated fly screen and a built-in aluminium-coated darkening/blackout blind, both adjustable independently.

What's the difference between this and the 1100x450 sliding version?
This one top-hinges open on friction stays and holds any angle you set; the sliding version instead slides the sash sideways, which needs no swing clearance.