Caravan Shower & Toilet Roof Hatch Guide: 280mm vs 320mm

A caravan shower or toilet roof hatch combines an opening roof vent with a powered fan to help move air through your bathroom. Extraction is useful for removing humid air after showering and ventilating enclosed toilet areas.

VanDIY offers two SJRV Turbo Vent models: a 280 × 280mm version without LED lighting and a 320 × 320mm version with an integrated LED light. Both use a 12V DC fan and a manually operated lid.

Compare the 280mm and 320mm SJRV Turbo Vents

Feature 280mm Turbo Vent 320mm Turbo Vent
Roof cut-out 280 × 280mm 320 × 320mm
Power supply 12V DC 12V DC
Fan operation Two-way ventilation and extraction Two-way ventilation and extraction
Lid operation Manual opening and closing Manual opening and closing
Insect screen Included Included
LED lighting No Yes
Suitable roof thickness 28–80mm 28–80mm
Main application Caravan toilet, shower or bathroom ventilation Caravan toilet, shower or bathroom ventilation with lighting

The roof cut-out and lighting are the main differences to consider. Choose the size that suits your installation rather than selecting by appearance alone.

Why Fit an Extractor Fan in a Caravan Bathroom?

Showering releases moisture into a relatively small enclosed space. An extractor fan draws humid air outside, helping the bathroom dry when replacement air can enter.

Ventilation also helps clear stale air and everyday bathroom odours. It works alongside regular cleaning and drying of wet surfaces.

A roof hatch ventilates the room itself. It is separate from the toilet cassette or waste-tank venting system.

Choosing the Correct Roof Opening

The cut-out is the opening through the roof, not the outside dimensions of the lid or trim.

The two SJRV models require different openings:

  • 280 × 280mm for the 280mm Turbo Vent.
  • 320 × 320mm for the 320mm Turbo Vent.

For a replacement, measure the existing roof opening and roof thickness. Allow space outside for the housing and lid movement, and inside for the trim.

Both models are listed for roof thicknesses of 28–80mm.

280mm Turbo Vent: Compact Ventilation Without LED Lighting

The SJRV 280mm Turbo Vent fits a 280 × 280mm opening. Its compact format suits smaller bathroom roof spaces where this opening size is required.

It combines a 12V two-way fan, manual lid operation and an insect screen. This model does not include LED lighting, making it an option where separate bathroom lighting is already provided.

View the SJRV 280mm toilet and shower Turbo Vent.

320mm Turbo Vent: Ventilation with Integrated Lighting

The SJRV 320mm Turbo Vent fits a 320 × 320mm roof opening and includes an LED light.

It combines bathroom ventilation and interior illumination in one roof-mounted assembly. The fan runs from 12V DC, while the lid opens and closes manually.

View the SJRV 320mm toilet and shower Turbo Vent with LED.

Two-Way Fan and Manual Lid Operation

Both models provide two-way fan operation for intake and extraction.

Exhaust mode draws bathroom air outside. Intake mode brings outdoor air into the room.

The lid is opened and closed by hand. An electrically powered fan does not mean the lid opens electrically.

When extracting, provide a suitable path for replacement air to enter the bathroom. Follow the model’s operating instructions for lid position, wet weather and travel.

Power, Installation and Care

Both models require a suitable 12V DC supply. Installation involves secure roof mounting, appropriate wiring and a weatherproof seal around the hatch.

Keep the insect screen and fan area clean to maintain airflow. Periodically inspect the roof seal and operating mechanism, following the care instructions supplied with the product.

Frequently Asked Questions

Can these hatches help remove humid air after showering?

Yes. Exhaust operation draws bathroom air outside, helping remove moisture when replacement air can enter.

Can both fans provide intake and extraction?

Yes. Both models are listed with two-way fan operation.

Can I open and close the lid manually?

Yes. Both hatches have manually operated lids.

Do both models include an insect screen?

Yes. An integrated insect screen helps keep insects outside while ventilating.

Can I choose a model with LED lighting?

Yes. The 320mm Turbo Vent includes an LED light.

Does the 280mm model include an LED light?

No. The 280mm Turbo Vent does not include LED lighting.

Can the 320mm model fit directly into a 280mm opening?

No. The models require different roof cut-out sizes.

Does the extractor fan replace the toilet’s waste-tank vent?

No. It ventilates the bathroom space. Toilet cassette and waste-tank ventilation are separate systems.

Shop Caravan Toilet and Shower Roof Hatches

Browse our caravan roof fans and extractor vents for the complete range.

Why Choose VanDIY?

VanDIY is a Queensland-based supplier of quality caravan parts and accessories. We’ve been supporting Australian travellers and DIY builders since 2006, offering proven products and real local support.

  • With warehouses in Gympie, Brisbane and Melbourne – we dispatch Australia-wide
  • Authorised SJRV distributor and product partner
  • 3-year warranty on major components
  • All stock tested and backed before it reaches our shelves
  • Fast, transparent freight and reliable customer service

Frequently Asked Questions

What caravan parts do you stock?


We offer a wide range of caravan parts and accessories including windows, fridge vents, roof fans, lithium batteries, 12V fridges, hot water systems, toilets, and washing machines – all designed for Australian conditions.

Where do you ship from?


We have 3 warehouse options - Gympie, Brisbane and Melbourne - Providing an item is in stock we will ship ex Gympie or Brisbane. If not in stock here, we'll ship ex Melbourne via the SJRV warehouse with fast and reliable freight options available Australia-wide.

Do you offer pickup?

Yes, we offer pickup from our Brisbane warehouse. If the item is out of stock in Brisbane, we'll ship it up ex Melbourne to the warehouse and notify you when ready.

Do you sell to trade and DIY customers?


Yes – VanDIY supplies both trade customers and DIY builders. Contact us for wholesale or volume pricing if you’re building or fitting multiple vans.

Shop Caravan Parts & Accessories Australia-Wide


Whether you’re building, repairing or upgrading your caravan, VanDIY makes it easy to find the right parts for your project. We stock a complete range of caravan parts and accessories including windows, vents, fans, fridges, lithium batteries and more – all tested for durability in Australian conditions. With warehouses in Gympie, Brisbane and Melbourne, we ship fast across Australia, offering real local support and advice. Browse online today or contact our team for help choosing the right gear for your build.