Last Updated on April 5, 2024 by Real Men Sow

7 Greenhouse Vents For
Temperature Control (Review) 2021

Are you struggling to keep the temperature and humidity in your greenhouse at the level you and your plants need? Are you sick and tired of having to wrench open the odd greenhouse window on your own, just to make sure you don’t end up cooking your vegetables before they reach the kitchen?

Greenhouse vent openers are likely to be fantastic purchases you are going to want to put at the top of your shopping list. Instead of having to guess when your windows need opening, you can use a greenhouse automatic vent opener to react as and when the temperature reaches a certain point.

Therefore, if your plants are likely to react badly to heat, window openers will kick into gear as soon as things get too sweltering. What’s more, if you are looking after tropical plants which thrive on serious heat, you can set up an automatic window opener to auto vent and close if things get too breezy.

If you are completely new to running your own greenhouse, you will likely find that there are plenty of gadgets like this out there which will make your life that little bit easier. In this buying guide, we will take a look at good quality greenhouse frame venting options which bring in just enough fresh air to help keep your growths healthy throughout the year. Be sure to check out buyer review scores and ratings, too.

In This Review

Gardening-Naturally Automatic Greenhouse Window Opener Best Value Vent

If your greenhouse is getting stuffy and you’re sick of having to wrench open the windows and vents on your own, this fantastic value greenhouse vent opener will give you plenty of heft for your money.

Built in steel with zinc coating, this greenhouse window opener offers plenty of durability as well as promise for years of use. It’ll open up your vent or window to around 45cm, though this may vary from case to case.

You can actually fine-tune these vent openers to widen all the way out at 30 degrees C, however, the general agreement is that it will work best within the temperature range of 17 to 25 C. Therefore, consider your plants, fruit and veg and whether or not this automatic vent opener is going to fit your needs best.

We love the fact that this auto vent option is so easy to install, and that you won’t have to pay much to take advantage. What you see is definitely what you get, and if you are completely new to the idea of automatic greenhouse window openers at all, then this could well be the best pick for you.

Features

Dimensions: 38 x 10 x 5cm
Weight: Unclear
Material: Steel (Aluminum Zinc Coating)

Bayliss XL Auto Vent Opener Easiest to Install

The Bayliss XL is a bit of a review favourite online, and it just so happens to be the best seller on Amazon right now. It’s a hefty window automatic opener, but will always make sure that your window opens when temperatures get to a specific point that you identify.

There are no tools needed when it comes to getting open the window here – meaning that it’ll easily clamp to your greenhouse, making it all the simpler to grant seamless greenhouse ventilation. You also benefit from a fantastic two year guarantee, which is all the more useful if you’re going to get plenty of use out of it.

This greenhouse window opener and vent opener benefits from an anti rust manufacture, meaning that you can rely on it opening and closing for you in all weathers. Set it to the ideal opening temperature and you can pretty much leave this no-frills greenhouse tool to do its job.

Features

Dimensions: 5.99 x 30 x 4.5cm
Weight: 0.49kg
Material: Wood and Anodised Aluminum

Thermoforce Automatic Greenhouse Vent Opener Best Automatic Vent Opener

This greenhouse automatic vent opener has the main selling point of a double spring. This means that, in theory, it will not only allow the opening and closing of your window at the temperature you demand, but will also protect even the flimsiest aluminum greenhouse from strong winds and aggressive weather.

It’s built in an aluminum alloy, which means it is one of the more resistant and durable greenhouse vent openers available on the market right now. It should be pretty easy to fit to most greenhouses in modern designs, meaning it’s simple to request even a hefty window opens and closes as and when things get too stuffy.

While a little more expensive than the Bayliss XL model, for example, this system will still get you to open the window at around 45cm without you having to do any fiddling around or temperature checking on your own. Just screw and clamp the vent opener into your panels or frames, whether it’s metal, wooden, or even polycarbonate. A great all around greenhouse automatic vent opener which won’t cost you over the odds.

Features

Dimensions: 38 x 9.5 x 9.5 cm
Weight: 0.5g
Material: Aluminum Alloy

Decdeal Greenhouse Windows Opener Temperature Controlled Automatic Vent Opener with Double Spring

Whether you are dealing with a cold frame or otherwise, this well priced greenhouse automatic vent opener should do more than plenty to keep your plants and greenery safe and warm. This automatic window system boasts a double spring which, again, should help to make it even more resilient when the window opens, and it should also mean that it is able to handle more in terms of pressure and window weight.

This is a solar powered vent opener, meaning that it will automatically open when the temperature gets up to 30 degrees C. Anything less than a range between 15 and 25, and it will close down. It’s a greenhouse ventilation system which, much like the above picks, should save you a lot of time and hassle when it comes to you keep having to dive in and out of the greenhouse every five seconds.

The extra thrust on this automatic vent opener should make it popular with any greenhouse owners who have struggled to find systems which will work well with their specific greenhouse window weight. You should expect this automatic vent opener to give you around 45cm in space once the auto vent is fully open, bringing plenty of fresh air into the greenhouse and releasing temperature as and when necessary.

Features

Dimensions: 38 x 9.8 x 5.2cm
Weight: 0.44kg
Material: Aluminum and Stainless Steel

Elloughton Greenhouses The Original Ellovent™ Automatic Greenhouse Window Opener Adjustable Roof Vent Autovent, Solar Powered

This solar powered greenhouse vent opener comes with a Danish manufacturing seal of quality guaranteed, meaning that if you are sick and tired of fiddling around with auto vent systems which just aren’t up to scratch, then you can probably do far worse. In fact, the manufacturer adds a guarantee to these automatic vent openers which should give you at least two years worth of use.

Automatic vent openers in this line are pretty sturdy and will clamp fairly tightly to your cold frame, making it a window opener that’s unlikely to fly off and cause a scene any time soon. However, you will need to make sure you tighten the auto vent system up so that it’s safely and securely in place.

This no-frills option is one of the best automatic vent openers for your greenhouse purely based on the fact that you have two auto vent and window opener settings, meaning that you can easily set at which temperature you’d like your greenhouse window to open.

Some auto vent and automatic vent openers are pretty fiddly to use from installation to over day operation. What we like about this automatic greenhouse vent opener is the fact that it is refreshingly simple, with the added promise that you are benefitting from the best in European manufacturing standards.

Features

Dimensions: N/A
Weight: N/A

Speedwellstar Greenhouse Window Vent Opener 2 Spring Strong Automatic

If it’s heavy duty automatic vent openers you’re looking for, then this window opener will likely give you one of the best opening and closing ranges available. This solar powered, heat sensitive window and vent opener will resist all the way up to 15kg in pressure, meaning it will likely work well with a wide variety of greenhouse window fittings, regardless of age, style and model.

Set your opening temperature between 15 C and 23 C, with a standard opening width of 45cm. This tends to be one of the general standards you’ll see across most auto vent openers – in that you probably won’t get much wider than 45cm on the whole!

This automatic vent opener is one of the most versatile, meaning that you can easily fit it to a cold frame in aluminium or you can screw it right in. The double spring functionality makes auto opening and closing a breeze. It’s one of the best greenhouse window openers up there with the Bayliss XL for our money, meaning we really think you can do far worse.

Features

Dimensions: 5 x 36.6 x 6.8cm
Weight: 0.15kg
Material: Metal

What is a Greenhouse Vent Opener?

A greenhouse vent opener takes away the stress of you having to open up your greenhouse windows yourself.

When you are growing plants, vegetables or fruit in a greenhouse, you will normally find that they all need a certain amount of temperature and humidity to thrive.

In the UK, the temperature is notoriously unpredictable, which means it makes sense to find an automatic vent opener which will make sure your window opens at a specific temperature and closes on another.

The best automatic vent openers will normally have a wide range for temperature, meaning you should be looking for one or more options which allow you to let your greenhouse effectively open itself up when the heat gets too much, or vice versa.

It is pretty easy to assume that all automatic vent openers are going to do the same thing. As you can see from the list of products we’ve found and set up for review for you, this really isn’t the case. If you are looking for an opener that can dictate when your greenhouse window opens and closes, then the above picks are probably great places to start.

Why Might I Need a Greenhouse Vent Opener?

It’s worth buying a roof vent opener or greenhouse window opener if you are struggling to keep the right temperature for your plants.

These systems will auto vent, which means all you need to do is set opening and closing temperature marks and your window opens and closes as and when it’s healthiest for your crops.

You’ll probably need an automatic vent opener if your plants and crops are sweltering in the heat or if you have one or more items which really could do with a bit of fresh air every now and again. However, it’s not always so easy to tell when the temperature is at an ideal point. That’s why a greenhouse vent or window opener can come in handy.

Simply fix and set up your vent opener and it will do all the hard work for you. Whether you have an aluminum greenhouse or otherwise, the best models can be confidently left to do all the hard work for you.

What Should I Look For in a Greenhouse Vent Opener?

Again, it’s easy enough to assume that one greenhouse vent opener is the same as the next. However, there are plenty of features and facilities worth looking out for.  Here are just a few things you might want to look out for when purchasing the best window vent opener for your own greenhouse.

Window pressure
Carefully measure the weight of one or more of the greenhouse windows you’d like to vent, and make sure to invest in an automatic vent opener which gives you enough heft.
Material

Material might not matter too much to you depending on whether or not you simply want to make sure your window opens and closes – but there are some metals and materials, for example, which are likely to be more durable than others. Stainless steel, for example, is likely to be an obvious choice for anyone with an aluminium greenhouse, or otherwise.

Temperature ranges

Depending on the plants and growths you have in your greenhouse, you are going to want to make sure you can set your automatic vent opener to the right temperature. Some have wider ranges than others.

Ease of installation
This is a pretty big factor for most people, but do always make a point of looking into how securely an automatic vent opener will fit to your greenhouse frame. Just because it’s easy to set up to your greenhouse doesn’t necessarily mean it’s going to be the best fit.
Opening width
This might not vary too much, believe it or not, but always make sure to check. Most window opener and vent opener systems will slide your windows open to around 45cm. This is just about enough to make sure that plants receive the right amount of ventilation without high winds making too much of a problem.
Flexibility
Not all automatic vent openers will be so flexible when it comes to temperature ranges and power, meaning it is well worth keeping an eye on how much you can adjust your opening and closing temperatures.

Conclusion

So – is it really worth setting up an automatic greenhouse vent opener?

The answer depends entirely on your current growing routine. If the plants and vegetables you are trying grow really depend on specific temperatures, then you are going to need to keep a close eye on your windows and vents.

However, not everyone has the time or ability to duck in and out of the greenhouse every five seconds! Therefore, it makes perfect sense for many people to want to invest in automatic greenhouse vent openers to cut down on the hassle.

Yes – believe it or not, there is a lot to choose between when it comes to the top automatic vent opener choices on the market. Therefore, we seriously recommend you take a look at our top picks above. The last thing you’re going to need is a greenhouse vent opener that breaks easily, or which really lets you down.

Take it from us – the picks in our list are tried and tested. As always, make a point of checking out the odd buyer review, too. These will be your allies in finding the perfect fit!