---
product_id: 47916789
title: "Speedwellstar Greenhouse Window Vent Opener, Heavy-Duty Twin Spring Automatic Opener up to 15kg, Solar Heat Sensitive"
brand: "speedwellstar"
price: "₨30611"
currency: LKR
in_stock: true
reviews_count: 8
url: https://www.desertcart.lk/products/47916789-speedwellstar-greenhouse-window-vent-opener-heavy-duty-twin-spring-automatic
store_origin: LK
region: Sri Lanka
---

# solar heat sensitive 15kg load capacity easy installation Speedwellstar Greenhouse Window Vent Opener, Heavy-Duty Twin Spring Automatic Opener up to 15kg, Solar Heat Sensitive

**Brand:** speedwellstar
**Price:** ₨30611
**Availability:** ✅ In Stock

## Summary

> 🌿 Let your greenhouse breathe—automate ventilation with smart solar power!

## Quick Answers

- **What is this?** Speedwellstar Greenhouse Window Vent Opener, Heavy-Duty Twin Spring Automatic Opener up to 15kg, Solar Heat Sensitive by speedwellstar
- **How much does it cost?** ₨30611 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/47916789-speedwellstar-greenhouse-window-vent-opener-heavy-duty-twin-spring-automatic)

## Best For

- speedwellstar enthusiasts

## Why This Product

- Trusted speedwellstar brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Upgraded piston design and durable metal construction guarantee long-term performance season after season.
- • **Effortless Setup:** Simple clip or screw installation with clear instructions—perfect for pros and weekend gardeners alike.
- • **Heavy-Duty Strength:** Twin double springs engineered to lift and support up to 15kg for robust, reliable ventilation.
- • **Smart Solar Activation:** Automatically opens your greenhouse window as temperatures rise between 15°C and 35°C, no wiring needed.
- • **Precision Temperature Control:** Adjustable opening triggers ensure your plants get optimal airflow exactly when they need it.

## Overview

The Speedwellstar Heavy-Duty Auto Greenhouse Window Vent Opener is a solar-powered, temperature-sensitive device designed to automatically open greenhouse windows up to 15kg. Featuring twin heavy-duty springs and an upgraded piston, it ensures durable, reliable ventilation triggered between 15°C and 35°C. Easy to install on aluminum or wooden frames, it offers adjustable settings for precise climate control, making it an essential upgrade for any serious gardener.

## Description

Full description not available

## Features

- 15kg Load Capacity – Effectively supports greenhouse windows up to 15kg for reliable ventilation
- Heavy-Duty Twin Springs – Designed for durability and strength, making it perfect for long-term greenhouse use
- Temperature changes in your greenhouse will trigger the opening device, the working conditions are - Start to open - 15°c - 23°c (59f-73f) - Fully open temperature 35° (19f) or above - Fully open distance 45cm (18") - Maximum opening weight 15 kg
- Can be clipped or screwed onto aluminium and wooden frames * Fitting instructions included - Simple to fit - Can be adjusted to different temperatures
- Heavy-Duty Twin Springs – Designed for durability and strength, making it perfect for long-term greenhouse use
- User-Friendly Installation – Simple setup with included instructions, suitable for gardeners of all experience levels
- Upgraded Piston Design – Enhanced piston for improved performance and longevity, ensuring consistent operation
- Screws for fittings included (Please ensure all are tight on fitting)* Things to remember - Please ensure your greenhouse window can be opened freely by at least 45 cm (18") We carry replacement parts for most of the items so please contact us if any problems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 5 x 36.6 x 6.81 cm; 550 g |
| Part number | GHAV |
| Material type | Metal |
| Power source type | solar_powered |
| Manufacturer | SpeedwellStar |
| Item model number | GHAV |
| ASIN | B00577EKDO |

## Images

![Speedwellstar Greenhouse Window Vent Opener, Heavy-Duty Twin Spring Automatic Opener up to 15kg, Solar Heat Sensitive - Image 1](https://m.media-amazon.com/images/I/71V6kCxCRxL.jpg)

## Questions & Answers

**Q: If the greenhouse is aluminium do you have to drill more screw holes in the frame next to the glass?**
A: Depending on your greenhouse, the clamps supplied may fit (or not) I found it easier to drill 4 holes for the self tapping screws (2 in the opening light  and 2 in the adjacent frame) to fix the automatic opening mechanism. All done in 45 minutes and works first time every time the temp hits 22c+. Mine is now a year old and saved me lots of potentially incinerated plants

**Q: Will this fit to a harmony greehouse with captive policarbonate panes**
A: Sorry, I am not familiar  with the lay out of a harmony greenhouse to compare with mine. My opening window is in the roof and is hinged at the join with the ridge and this is the top pane of three on that side of  the roof. The "window" (approx. 20 x 20 ins) has an aluminium frame which butts up to a cross bar where it meets the next pane down and previously was fitted with a stay that was opened and fastened manually. The Solar Vent replaced this and required a little drilling and fixing to the frames of both which was a bit fiddly, but it works first time every time. Mine  is set to open about 25 C and saves a lot of worry and shrivelled plants. TIP: Before fitting put the unit in the freezer for half an hour, take out and fit  in place and then adjust to what temp you want it to open. Hope this helps, mine has been priceless. Good luck
PS just had a look at harmony g/houses on amazon and  they look to be aluminium frames.......... should work a treat.

**Q: Order it and it arrived today but no fittings in box**
A: All the necessary fittings were in a plastic bad in the box

**Q: Will this work on my Garmen greenhouse?**
A: These vent openers are designed to fit the vast majority of greenhouses, and are perfect for opening and closing their vents or windows according the how hot it is inside the greenhouse. They also allow you to adjust the temperature at which they activate.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing product
*by J***A on 11 July 2024*

Very good quality product. No I don’t have a stress when I go to work or on holidays who will open and close my greenhouse. Works like it should. Opening when +17 or get direct sun, and close back when temperature drops down. Highly recommend for everyone who has a greenhouse.

### ⭐⭐⭐⭐⭐ Works. Fitted to Vitavia Venus
*by R***) on 21 June 2022*

Instructions were bobbins. I recently installed a genuine Vitavia vent. The instructions were bobbins for that too. This vent is better than the genuine Vitavia item, easier to install and half the price.

### ⭐⭐⭐⭐ Still working fine two years on
*by M***K on 19 April 2020*

No sign of leakage from the cylinder. So supposing that you get the same product as I did two years on, it's pretty good.My main criticism is that the product delivered is not as shown in the entry, where the cylinder sits out of the way roughly parallel to the glass. Instead, the cylinder sticks down quite a way so I will have to be careful not to catch it with my head.On the positive side, the different product comes with different instructions complete with a diagram that shows the cylinder sticking downwards. Criticism of the instructions in earlier reviews therefore no longer applies - I found them clear, with plenty of diagrams and descriptive text. It took me a bit less than an hour from opening the box to having the product fitted. In retrospect, it would have been quicker to remove the pane of glass below the hinged bit to give access to fit the lower part of the assembly and enable me to drill holes without great care.One reviewer suggested putting the cylinder in the fridge before fitting it. Another option is to stand on a small step ladder and open the window until the holes line up. The potential snag with this approach is that if you slip, the end of the cylinder could go through the glass. Again in retrospect, I could have avoided that risk by putting a paper clip temporarily through the upper hole in the collar before fitting the split pin in the lower hole.It was thoughtful of the supplier to provide a spare screw of each type and a spare split pin. They are, indeed, easy to drop and lose - particularly the split pin. To be on the safe side, I slipped a colourful bag tie through the hole at the end of the split pin to make it easier to spot it on the ground.

## Frequently Bought Together

- Speedwellstar Heavy-Duty Greenhouse Window Vent Opener - Automatic Solar Heat Sensitive Kit, Supports Up to 15kg Load with Twin Double Springs
- Gardening Naturally Greenhouse Louvre Vent Automatic Window Opener
- Speedwellstar 15Kg Greenhouse Vent Opener Piston - Replacement Automatic Window Cylinder for Cold Frames and Greenhouses

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-04*