Opens at around 72º
Paraffin oil expands with heat and pushes the window open up to about 14".
Exaco
Exaco Janssens Automatic Roof Window Opener
Exaco Janssens Automatic Roof Window Opener
A heat-driven opener that opens and closes your Victorian roof window on its own, with no electricity.
Regular price
$95.00 USD
Regular price
Sale price
$95.00 USD
Unit price
per
Shipping calculated at checkout.
- 100% FREE SHIPPING
- AUTHORIZED RETAILER
- SECURE ORDERING
- NO SALES TAX
- PRICE MATCH GUARANTEE
- GREAT TECHNICAL SUPPORT
Couldn't load pickup availability
“Greenhouse quality is superb and the customer service is outstanding. Thank you to Mulberry Greenhouses!”
- Opens automatically at around 72º
- Opens the window up to about 14"
- Heavy spring closes it as it cools
- No electricity or wiring needed
- For Royal and Junior Victorian roof windows
- Black finish
- 100% free shipping
- Authorized retailer
- No sales tax (except georgia)
- Price match guarantee
- BBB AccreditedA+ rating
- Shop Pay InstallmentsPay over time
- Woman-ownedMeet our team
- Why buy from usOur promise to you
Questions before you buy?
Talk to a greenhouse specialist: 678-408-8222 or Info@mulberrygreenhouses.com
Product Description
Exaco Janssens Automatic Roof Window Opener
This is an amazing feature provided for Royal or Junior Victorian greenhouse owners who do not want to manually open their roof windows. The black tube is filled with special paraffin oil - which expands when the temperature reached around 72º and the piston will push the window open up to about 14". When temperature falls a heavy spring pulls the window closed. No electricity needed!
Specifications and Details for the Automatic Roof Window Opener
- Fully automatic - no electricity needed!
- Opens to approx 14"
- opens roof window automatically when it reaches 72º
- Automatically closes when temperature drops.
- Please read instructions included with the Ventomax auto opener to fully understand the functioning and maintenance for these unique openers
- Black color
Installation
Installing the automatic opener requires 2 bolts to be inserted into the roof crossbar for the lower mount The upper mount will clamp onto the window profile (Shown to the right).
- Around 72º Opens at
- Up to about 14" Opening
- None needed Power
- Black Color
- Janssens Royal and Junior Victorian roof windows Fits
Exaco · Accessory
Overview
Why customers choose it
Ventilation that runs itself
Closes on its own
As the temperature drops, a heavy spring pulls the window shut.
No power needed
There is nothing to wire or plug in.
Simple to mount
Two bolts in the roof crossbar, and the upper mount clamps onto the window profile.
The details
Specifications
Performance
| Opens at | Around 72º |
|---|---|
| Opening | Up to about 14" |
| Closing | Heavy spring as the temperature drops |
| Power | None needed |
Materials
| Color | Black |
|---|---|
| Mechanism | Paraffin oil cylinder (Ventomax) |
Fits
| Fits | Janssens Royal and Junior Victorian roof windows |
|---|---|
| Mounting | 2 bolts in the roof crossbar, upper mount clamps onto the window profile |
Good to know
Frequently asked questions
Can't find your answer? Our greenhouse specialists are happy to help you choose.
678-408-8222 Email usDoes the opener need electricity?
No. It is fully automatic and works by the expansion of paraffin oil inside the cylinder.
At what temperature does it open?
It opens the window at around 72º, pushing it up to about 14". As the temperature falls, a heavy spring pulls the window closed.
How is it installed?
The lower mount needs 2 bolts inserted into the roof crossbar, and the upper mount clamps onto the window profile.
Which greenhouses does it fit?
It is made for the roof windows of Royal and Junior Victorian greenhouses.
Is shipping really free?
Yes. Shipping is free. Locations with limited access, such as islands, are rare exceptions that may carry an extra fee, and we'll tell you before anything ships.
Do you offer a price match?
Yes. If you find the same greenhouse for less from an authorized dealer, call or email us with the offer and we'll review it.
Are you an authorized retailer?
Yes. Mulberry Greenhouses is an authorized retailer, so your greenhouse is covered by the full manufacturer warranty.
