I have now bought 2 Ellovent Automatic Greenhouse Window Openers from Elloughton Greenhouses, both in last couple of months. The first one I bought via Amazon to replace an old Ventomax. I was so pleased with it that I tried to buy another to replace the manual window latch in the same greenhouse, but was disappointed to find that it was no longer available on Amazon. Relief came when I found that Elloughton Greenhouses have their own website and I was able to purchase the second one directly, AND at a slightly lower price than on Amazon. The delivery and packaging was equally good in both cases.