The Fiamma Rooflight Vent 40 Crystal is a 400 x 400mm roof vent built for caravans, motorhomes and van conversions. It's manufactured in Italy by Fiamma and features a translucent tintedor white dome that allows natural daylight into your vehicle while providing permanent ventilation through a fixed airflow channel. The outer dome measures 455 x 455mm, and it fits a standard 390 x 390mm roof cut-out. An integrated aluminium mosquito net sits below the dome, keeping insects out while air circulates freely. The vent opens and closes with a handwheel, and a centre support arm holds it steady at your chosen position. Fiamma's patented rubber seal system keeps rainwater out, and the whole unit is made from UV-resistant materials rated to TUV and ABE safety standards.
Does the Fiamma Crystal rooflight fit existing 400 x 400mm caravan roof openings?
The Fiamma Vent 40 Crystal fits roof cut-outs from 360 x 360mm up to 420 x 420mm thanks to its reinforced frame, making it a direct replacement for older Fiamma 40x40 rooflights and many other brands. It suits roof thicknesses between 25mm and 50mm as standard, with an optional extension kit (Fiamma code
98683W116) extending this to 85mm.
The crystal dome is tinted rather than fully transparent, so it lets light through without allowing a direct view inside. This makes it a popular choice for living areas and kitchens where you want bright conditions but still need a degree of privacy. It's also the version you'd pick if you want to add the optional Fiamma Rollo Vent 40x40 roller blind later on, since the white-lidded version blocks light on its own and doesn't need one. The aerodynamic profile of the outer dome has been designed to reduce wind noise and vibration at motorway speeds, and Fiamma state that the updated design removes the need for a separate air spoiler.
Installation requires a sealant such as Sikalastomer-710 applied to the underside of the outer frame before fitting. Fixing screws are not supplied with the unit. The rooflight is interchangeable with previous-generation Fiamma 40x40 vents, so if you're replacing an older model the existing roof aperture should work without modification. Fiamma recommend checking that the roof area is flat and free from internal obstructions like luggage racks, cables or cabinet edges before cutting or fitting. The Fiamma code for this product is 04329B02D.
Fiamma Rooflight Vent Features
- Aerodynamic shape means that a spoiler is not required
- Simple opening system with handwheel
- Fitted with aluminium mosquito net
- Allows constant air circulation
- ABE approved
Specifications
- Brand : Fiamma
- Type : Roof Vent
- Size : 40cm x 40cm
- Weight : 2.8kg
- Approvals : ABE approved
- Application: Caravans, Motorhomes, Van Conversions
- Country of Origin : Italy
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Frequently Asked Questions
The standard roof cut-out is 390 x 390mm. The reinforced frame means it's interchangeable with openings from 360 x 360mm up to 420 x 420mm, making it a direct replacement for older Fiamma 40x40 rooflights and compatible with many other brands' 400 x 400mm apertures.
It fits roofs between 25mm and 50mm thick as standard. If your roof is thicker than 50mm, Fiamma offer an optional Extension Kit (code 98683-116) that extends compatibility up to 85mm.
The Crystal version has a translucent tinted dome that allows natural light into your vehicle while reducing heat from direct sunlight. The white version has an opaque lid that blocks light entirely, so it doesn't require a roller blind. If you want daylight and the option to add the Fiamma Rollo Vent 40x40 roller blind later, choose the Crystal. If you prefer a darker interior without additional accessories, the white is the better option.
No, fixing screws are not included. You'll need approximately 20 screws to secure the internal frame. Fiamma also recommend using a sealant such as Sikalastomer-710 or Therostat II on the underside of the external frame to create a watertight seal.
No, this is a manually operated rooflight with passive ventilation through a fixed airflow channel. If you need powered ventilation, Fiamma offer the Turbo Vent and Turbo Vent Premium models in the same 40 x 40cm size, both available with crystal or white covers and featuring 12V motorised fans.
The Fiamma Vent 40 is designed for a 390 x 390mm cut-out but fits apertures up to 420 x 420mm. Many MPK 400 x 400mm rooflights use the same aperture size, so the Fiamma is often a direct replacement. Check your existing roof opening dimensions and roof thickness before ordering to confirm compatibility.
Use an acrylic glass cleaner with a soft cloth. Do not use glass cleaners, all-purpose cleaners, abrasive products, alcohol-based detergents, solvents or any corrosive liquids, as these will damage the crystal dome. The aluminium mosquito net can be removed and cleaned separately with water and a neutral detergent.
The Fiamma product code is 04329B02D. The EAN barcode is 8004815423179. This code identifies the Crystal (translucent) version of the Vent 40 rooflight, as distinct from the white opaque version.
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