We've found these Bayliss Automatic Greenhouse Vent Openers to be the best on the market and are suitable vents for both wooden or aluminum grenhouse windows and frames.
With the two of the most important aspects of successful greenhouse growing being adequate ventilation and preventing excessive temperatures, the Bayliss XL Greenhouse Autovents are invaluable as they react to changes in greenhouse temperature and open and close vents accordingly . Please note that although the Bayliss XL Autovent will fit the vast majority of greenhouses, some models of Halls and Robinsons may require additional fixings. We also recommend the Bayliss MK7 Autovent for use on any Alton greenhouse structure.
• Bayliss XL Autovent can be simply clamped onto aluminium greenhouses without any drilling • Alternatively, bolt on using existing holes or drilled holes • Bayliss XL Greenhouse Autovent is 28cm long and will lift a vent weighing up to 5.5kg, or a vent approximately 61cm x 76cm (24" x 30") • Opens approx 30cm • Supplier offers 2 year guarantee on replacement cylinders but they should last approximately 6-10 years • Additional fixings (not supplied) may be required for fitting to some Halls and Robinsons models
What The Experts Say...
"If you haven't already got automatic openers installed for your greenhouse windows, fit some straight away. Automatic openers work by wax within their cylinder expanding when it's hot, pushing a piston to open the window and contracting in cooler temperatures to close the window again. Worth the investment to free yourself from being controlled by the vagaries of British weather - no more trips to the greenhouse to open and close windows manually every time the weather changes!" Buyers' Guide, Garden News, 18 June 2008
Gardeners want to enjoy growing all through the year, and with energy efficient Grow Light Kits, this is now a possibility! Replace low levels of winter light or grow in other places devoid of sunlight with this combination of powerful 200W low-energy horticultural lamps and metal reflectors. The bulbs wash 100% PAR (Photosynthetically Active Radiation) light at the correct spectrum over seeds and plants, allowing them to germinate and grow with impressive results. The single bulb kit lights 2 standard seed trays and the double bulb covers 3 trays - hooks are simply attached to the ceiling and the kits supported from height adjustable hangers. All fixings and 3m mains lead included.
• Available in Single Bulb Kit Only • Each kit includes bulbs, reflector and easy-roll hangers • Spare 200W bulbs also available • Reflectors made from high quality steel, powder coated, fitted with louvre vents and have a mirrored inner surface • Hang reflector 60cm to 120cm above plants for best results • At this height a Single Bulb Kit covers area 50cm L x 33cm W x 12cm D • Very low running costs - multiply 0.2kw (200W) by your energy provider's hourly unit rate to calculate • Bulbs completely safe - will not burn skin or clothes • Non-heat generating bulbs can be used as low as 3-4cm above plants • Produce fresh cut-and-come-again salads and herbs all year round • Lights are self-ballasting and need no transformer or ballast - just plug into mains • Hang lights from roof-struts in greenhouse, garden shed or garage
What The Experts Say...
Clare Foggett from Garden News recommends; "...buy a timer for your plug socket as well so you can set the light to come on and off automatically."
"A grow lamp in your greenhouse is a good way of getting seedlings and young plants off to an early start when natural light levels are low in winter. You can either leave the light on all through the day to increase the light intensity or turn it on early early morning or late afternoon to extend the day length, or both..."Do it in 30 Minutes, Garden News, January 6th 2009