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Eligible for Return, Refund or Replacement within 30 days of receipt
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Jewel 20 047 Windows Machine for Cold Frame

4.4 4.4 out of 5 stars 46 ratings

$49.99
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Purchase options and add-ons

Brand Juwel
Item Weight 0.01 Kilograms
Operation Mode Automatic

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Product Description

This cold frame automatic opener works for the Juwel 1000 Basic Unit and 1000 Extension Unit. Special jelly in the black cylinder responds to inside temperatures to automatically open and close the top panels without electricity. Arm raises at 67 degrees F. Raises up to 12lbs. With it full opening at 17 in.

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Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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Jewel 20 047 Windows Machine for Cold Frame

Jewel 20 047 Windows Machine for Cold Frame


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Customer reviews

4.4 out of 5 stars
4.4 out of 5
46 global ratings

Customers say

Customers like the quality and automatic features of the can opener. They mention that it works great and is super helpful. That said, some complain about the instructions being unclear and in German.

AI-generated from the text of customer reviews

5 customers mention5 positive0 negative

Customers are satisfied with the quality of the can opener. They mention that it works great, works like a charm, and is super helpful.

"Just bought a couple of these. They work great...." Read more

"...It works great! It does indeed raise on warmer days, and raise more the warmer it is...." Read more

"...It works perfectly." Read more

"This opener works like a charm! You don't have to worry about too much heat inside. It does the openingffor you. GREAT!" Read more

3 customers mention3 positive0 negative

Customers like the auto-arm of the can opener. They say it's a godsend as it opens up the cold frame automatically when the temperature is warm enough.

"This auto-arm is a godsend as it opens up the cold frame automatically when the temp is warm enough!..." Read more

"Great little cold frame openers..." Read more

"automatic opener..." Read more

3 customers mention0 positive3 negative

Customers find the instructions for the can opener difficult to follow, as they are not particularly clear or in English. They also mention that the pictures are not great.

"...As others have stated, the directions are not helpful and they do not explain the design and function of this nifty opener very well...." Read more

"...Installation was easy, although the directions were not particularly clear. However, once through the annoyance of installion it's working well...." Read more

"...The instructions are in german, and the pictures are not that great." Read more

Top reviews from the United States

Reviewed in the United States on April 6, 2013
Just bought a couple of these. They work great. I'm using one with a light plastic cold frame top and another with an old wood frame plexiglass top that is quite heavy. Installation on the cold frame is a little bit a hassle and the provided screws are limited to thin material, so you will either have to rummage through your can of old nuts and bolts (which is what I did to find what I needed) or measure the length you need and get it from a hardware store. You can't blame the manufacturer for this since every cold frame requires different hardware.

You can EASILY detach the opener in order to lift the cold frame cover. The bottom attachment arm can be removed and reattached by squeezing the arms together.

As others have stated, the directions are not helpful and they do not explain the design and function of this nifty opener very well. But even I could figure it out and mechanically this gadget is outstanding.
14 people found this helpful
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Reviewed in the United States on April 17, 2015
I attached 2 of these to my new Juwel Cold Frame 1000. Be advised that you will need to drill 4 holes into your cold frame to mount the arm.

It works great! It does indeed raise on warmer days, and raise more the warmer it is. Installation was easy, although the directions were not particularly clear. However, once through the annoyance of installion it's working well. It's also easy to partially detach the arm in order to open the cold frame to plant or water inside.
4 people found this helpful
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Reviewed in the United States on June 20, 2013
This auto-arm is a godsend as it opens up the cold frame automatically when the temp is warm enough! Saves a lot of running out to the garden to check on the frame!
One person found this helpful
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Reviewed in the United States on June 5, 2012
It took a while to figure out the best way to mount this because I didn't want to drill thru the plastic as shown. All I needed was a metal tee from the hardware and than used all the parts as supplied and mounted every thing on the frame. It works perfectly.
6 people found this helpful
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Reviewed in the United States on September 20, 2011
I am a somewhat haphazard gardener but with my Jewel cold frame and the automatic opener, my shortcomings do not matter. Whenever the temperature gets high enough to cook my seedlings on a bright sunny day,up pops the opener. This is the second one I have had, the other on an improvised sunbox- a simple wood frame and old window, and that works perfectly too. I would not consider a cold frame without an automatic opener!
6 people found this helpful
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Reviewed in the United States on April 30, 2013
This opener works like a charm! You don't have to worry about too much heat inside. It does the opening
ffor you. GREAT!
Reviewed in the United States on September 27, 2008
I have had my cold frame lid lifter for three seasons now and it had worked well and reliably. It was simple to install and adjust. It must be taken in over the freezing winter.
17 people found this helpful
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Reviewed in the United States on September 25, 2010
I bought this with the idea of using it on my custom wood greenhouse. I had to modify the mounting of it but in the end it has worked fine. The instructions are in german, and the pictures are not that great.
12 people found this helpful
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Top reviews from other countries

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Popolus
5.0 out of 5 stars Automat für Frühbeetkasten
Reviewed in Germany on September 10, 2019
Der Automat funktioniert super, aber nur beim Frühbeetkasten, ansonsten stimmt der Montagewinkel nicht.
One person found this helpful
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Dave44
5.0 out of 5 stars Fully satisfied
Reviewed in the United Kingdom on August 18, 2016
Working fine on my self made cold frame. I did'nt modified the temperature setting but it does the job. In France the price is too expensive for this device.
Keli Heinz
5.0 out of 5 stars ein einfacher günstiger fensterautomat
Reviewed in Germany on July 9, 2013
der automat ist sehr gut funktioniert einwandfrei,hab diesen automat für mein frühbeet und glashaus im einsatz,der preis ist in ordnung und die lieferung extrem schnell.
6 people found this helpful
Report
ceyhan deniz
4.0 out of 5 stars Sehr zufrieden
Reviewed in Germany on April 7, 2023
Sehr zufrieden
TV
4.0 out of 5 stars Stabil und funktioniert
Reviewed in Germany on September 23, 2021
Ich nutze den Fensteröffner für das Frühbeet unserer Schildkröten. Er ist stabil und funktioniert einwandfrei. Die Montage, insbesondere die Stelle, an der man den Fensteröffner anbringt, sollte man gut planen, ist aber prinzipiell nicht schwer. Praktisch wäre es, wenn man ihn auch einfach wieder aushängen könnte, so dass die Kkapoe wieder ganz öffnet. Das geht meines Wissens nicht, ohne alles wieder abzuschrauben.
Auch der Preis ist ziemlich hoch.