Window Openers - Page 2 - Blowout Sale! Save up to 64%


Blowout Sale! Up to 64% off on Window Openers at Halo Grow Box, Page 2. Top brands include TruePower, Sumnacon, GOTOTOP, Robolife, Mokylor, Youzpin, Haofy, SING F LTD, Grandio Greenhouses, Jack-Store, GLOGLOW, Whitelotous, Baidfeng, Alian, Earthcare, Zerone, Bayliss, & Vent-L. Hurry! Limited time offers. Offers valid only while supplies last.



Set of 2 Roof Window/Vent Opener for Greenhouses (NO TEMPERATURE CONTROL)
By TruePower
In Stock
$19.95

mpn: 40-8332, ean: 0870208000344,

4.5 out of 5 stars with 124 reviews
This heavy duty greenhouse window/vent opener uses a hand operated thumb knob to open and close greenhouse windows. The automatic temperature control does NOT function on these units.2pc Greenhouse window/vent opener - NO TEMPERATURE CONTROL. Window lift weight: 15 lbs. max. 90 degree maximum window/vent opening angle. Manual operation only - thumb knob opens/closes vent (no temperature control).


Sumnacon Hydraulic Cylinder Replacement - Auto Vent/Automatic Greenhouse Window Opener Replacement Cylinder for Univent, Thermovent, Optivent, Ventomax, Sesam Liberty Window Opener
By Sumnacon
In Stock
$28.99

ean: 0607569035209,

4.2 out of 5 stars with 93 reviews
Description: Replaces worn out Piston Rod from one or more of your Vent Window Openers. The core technology is the hydraulic cylinder that contains a plant-based wax. This special designed cylinder containing this wax, works as the greenhouse window openers thermostat, thus there is no need for electrical power supply You don't need any electricity in your greenhouse; the window opener will be very environmental throughout its whole lifetime Specifications: - Fully open distance: 45cm / 18'' -


GOTOTOP Solar Heat Sensitive Automatic Greenhouse Vent Opener Replacement Cylinder Temperature Sensor Auto Vent Kit
By GOTOTOP
In Stock
$17.99

mpn: GOTOTOPbu18xznigv, ean: 0700890350376,

4.9 out of 5 stars with 100 reviews
Specifications: Item Type: Greenhouse Winder Opener Cylinder Temperature range 15°- 25°/60°-77F Package: 1 x Greenhouse Winder Opener Cylinder Notes: Do not use this opener cylinder anywhere the temperature will exceed 50° (122F). Do not dismantle the cylinder. This products need to be refrigerated before use it. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.Made of quality


Robolife Automatic Window Opener for Garden Greenhouse Single Spring
By Robolife
In Stock
$25.99
4.9 out of 5 stars with 9 reviews
Open automatically when the temperature rises, while closing automatically when the temperature drops, replace the manual window arm. Made of aluminum and stainless steel, durable and weather resistant. No battery or electricity needed, no running costs,suitable for any aluminum frame greenhouse. The maximum window opening distance is approximately 45cm/18 inch. Suitable for greenhouse windows weight up to 7kg/15 lbs.


Mokylor Balcony Greenhouse, Cold Frame Greenhouse Garden Plants Raised Protection Bed Portable for Protected Patio, Balcony Plant Growing and Gardening
By Mokylor
In Stock
$27.66

mpn: ST787A11-938-1130562382, ean: 0192585394107,

4.8 out of 5 stars with 85 reviews
Features:☆ Clear polycarbonate panels allow maximum light transmission while retaining heat.☆ Adjustable roof openings provide proper ventilation and easy access to your plants.☆ Rust-resistant hardware and an aluminum frame prevent corrosion of its components.☆ Keeps squirrels and other small animals from digging up your planted bulbs and shoots.☆ Peak height measures over 24'' so you'll have plenty of space for plant preparation and growing.Specifications:Material: Reinforced clear


Youzpin 1Pcs Agricultural Greenhouse Carbon Steel Heat Sensitive Automatic Window Openers,Greenhouse Vent Opener Spring Auto Vent Kit
By Youzpin
In Stock
$38.99
$23.99
You Save: 38%

mpn: YB059368, ean: 0794163036388,

4.1 out of 5 stars with 85 reviews
Youzpin 1Pcs Agricultural Greenhouse Carbon Steel Heat Sensitive Automatic Window Openers,Greenhouse Vent Opener Spring Auto Vent Kit Feature: Ideal for your greenhouse window--opens and closes your greenhouse window. as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. Non Electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops. Including fittings & installation manual Can be


Haofy Automatic Window Opener Solar, Hydraulic Cylinder Replacement Sensitive Automatic Greenhouse Window Opener
By Haofy
In Stock
$19.99

mpn: Haofygeax6obi23, ean: 0798382100288,

4.1 out of 5 stars with 111 reviews
Features:     This is a replacement cylinder for automatic window opener.     High sensitive, automatic respond to weather changes, so you don't need to stay near the greenhouse.     Non electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops.     Great for most greenhouse to open or close window automatically.     Time and labor saving, also can supply a better temperature condition of plant's growth.  Specifications: Condition: 100% Brand


Automatic Greenhouse Window Vent Opener Replacement Cylinder ONLY
By SING F LTD
In Stock
$15.19

ean: 0616010892261,

4.5 out of 5 stars with 139 reviews
Item Descriptions:-This listing is a replacement CYLINDER only, for the full set of auto vent opener you can find it in my shop.-Also suitable for Orbesen, Gardman & B&Q vents-Non Electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops-Important notice:Do not use this opener anywhere the temperature will exceed 50° (122F)Package:1x Replacement Greenhouse Window Opener CylinderItem Specifications:Temperature range: 15°- 25°/60°-77FMaximum opening weight:


Grandio Automatic Greenhouse Wall Louver Opener
By Grandio Greenhouses
In Stock
$79.00
4.9 out of 5 stars with 63 reviews
Automatically opens and closes the louver window when temperature changes. The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling..


Jack-Store Solar Heat Sensitive Automatic Thermofor Window Opener Greenhouse Autovent Vent Opener Standard - Lifts 15 Lbs
By Jack-Store
In Stock
$26.99

ean: 0713924929141,

4.2 out of 5 stars with 42 reviews
Ideal for your greenhouse window--opens and closes your greenhouse window as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. No batteries or electrical power needed. The liquid-filled cylinders expand as temperature increases. Including fittings & installation manual. Can be clamped onto or screwed onto your greenhouse frame. Important notice:Do not use this opener anywhere the temperature will exceed 50° (122F).


GLOGLOW Window Opener for Greenhouse, Temperature Controlled Sensor Automatic Solar Heat Sensitive Roof Auto Window Opener
By GLOGLOW
In Stock
$12.34

mpn: GLOGLOW5ay1egnfbk, ean: 0792172590631,

4.6 out of 5 stars with 105 reviews
Specifications: Condition: 100% Brand New Material: ABS Color: Black Temperature Range: 20~25℃ / 68~77℉ Size: approx. 33*1.5cm / 12.99*0.59in Weight: approx. 117g Package Included: 1 x Window Opener Cylinder Only Note: 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.◆ This is a replacement


Whitelotous Solar Heat Sensitive Automatic Thermofor Window Opener Greenhouse Vent Replacement
By Whitelotous
In Stock
$28.27
$27.99

mpn: 7080532, ean: 0758574552653,

4.1 out of 5 stars with 150 reviews
Important notice:Do not use this opener anywhere the temperature will exceed 50° (122F)Please ensure your greenhouse window can be opened freely by at least 45cm (18'')Do not apply excessive loads by locking or covering windowDo not dismantle the cylinderThe opener CANNOT stop by manualSpecifications:Maximum window opening     45cmMaximum opening about 30°, depending on adjustment and loadMaximum opening weight 7kg/15lbPackage Content:1 X Automatic window opener1X Instruction ManualIdeal


Baidfeng Window Openers Straight Arm Operator (Left Hand),High Quality Alloy Hand Fenestrators
By Baidfeng
In Stock
$28.88

mpn: BF20180511, ean: 0634759421191,

4.4 out of 5 stars with 22 reviews
It can withstand 85 pounds of weight, good wind resistance and long service life.. Slide smoothly, open the window will not make a harsh voice, let you experience quiet life.. Using the effect of outdoors powder spraying, the corrosion resistance is strong.. There are many categories, which can be customized according to your needs.. The installation is convenient and the position is optional..


Alian Greenhouse Automatic Window Opener Univent Automatic Vent Opener Standard - Lifts 15 Lbs
By Alian
In Stock
$86.00
$30.98
You Save: 64%

mpn: EL00391, ean: 0099136065731,

4.1 out of 5 stars with 63 reviews
Features: 1. Solar Vent Opener can lift up to 15 lbs. 2. It prevents your greenhouse from overheating. 3. As the temperature changes automatically, it maintains the best growing temperature and prevents your greenhouse from overheating. Instructions For Use: Automatic window opener opens and closes your greenhouse vent panels. Raise or lower the temperature setting with a simple twist of the cylinder and the it can be adjusted from approximately 65 to 80 degrees Fahrenheit. No electrical power


EarthCare Universal Greenhouse Vent Auto Opener
By Earthcare
In Stock
$53.99

mpn: Z5-ZZ58-YRT5, ean: 0837654633212,

4.7 out of 5 stars with 95 reviews
.


Zerone Window Opener, Single Spring Heat Sensitive Automatic Window Opener Temperature Sensor Auto Window Vent for Sheds and Greenhouse, Maximum Opening Weight 7kg/15lb
By Zerone
In Stock
$25.99

ean: 0741870639852,

4.9 out of 5 stars with 107 reviews
Specifications: Greenhouse Window Opener Kit Maximum window opening 45cm Maximum opening about 30°, depending on adjustment and load Maximum opening weight 7kg/15lb Adjustable open temperature range 15°- 25°/60°-77F Package: 1 x Automatic Window Opener Kit Notes: Do not use this opener anywhere the temperature will exceed 50° (122F) Please ensure your greenhouse window can be opened freely by at least 45cm (18'') Do not apply excessive loads by locking or covering window Do not dismantle


GLOGLOW Greenhouse Vent Automatic Opener Autovent Solar Heat Sensitive Greenhouse Window Roof Vent Adjustable Temperature Sensor for Greenhouse
By GLOGLOW
In Stock
$21.62

mpn: GLOGLOW743gh2d1k5, ean: 0700890215712,

4.1 out of 5 stars with 122 reviews
Specifications: Greenhouse Window Opener Kit Material: Aluminum Alloy Maximum window opening: 45cm Maximum opening about: 30°, depending on adjustment and load Maximum opening weight: 7kg/15lb Adjustable open temperature range: 20°- 25°/68°-77F Size: 38 x 9.5 x 9.5 cm / 14.96 x 3.74 x 3.74 inch (appr.) Package: 1# Automatic Window Opener Kit / Replacement Greenhouse Window Opener Cylinder (You can choose what you want) Notes: Do not use this opener anywhere the temperature will


Baidfeng Window Openers Arm Operator (Right Hand), Alloy Hand Fenestrators
By Baidfeng
In Stock
$35.88

mpn: BF20180511, ean: 0634759421207,

4.7 out of 5 stars with 110 reviews
It can withstand 85 pounds of weight, good wind resistance and long service life.. Slide smoothly, open the window will not make a harsh voice, let you experience quiet life.. Using the effect of outdoors powder spraying, the corrosion resistance is strong.. There are many categories, which can be customized according to your needs.. The installation is convenient and the position is optional..


Bayliss Greenhouse Autovent, XL
By Bayliss
In Stock
$38.59
$38.07
You Save: 1%

mpn: XL Autovent, ean: 0764558054914,

4.0 out of 5 stars with 65 reviews
BAYLISS XL Autovent - full retail package Brand new stock available for immediate despatch. Offered with a manufacturer backed full 2 year guarantee. Opens greenhouse roof vents as the temperature rises, automaticaly closes as temperature drops. Automatic Greenhouse Window Opener, Simple, Strong & Easy to Fit. Made Entirely in the UK • Easy to fit - Screws into wood and clamps onto aluminium greenhouses without the need for drilling. (Full fitting instructions supplied) • Easy to set - one


Automatic Vent opener Vent-L N001 for window/doors of greenhouse load up to100kg
By Vent-L
In Stock
$41.90

mpn: 002, ean: 0645490991461,

4.6 out of 5 stars with 118 reviews
Universal Automatic Vent-L for vents, doors, greenhouses and polytunnels Vent-L is a unique, versatile, reliable device that does not require electricity, and works only on the raising of temperature in your greenhouse.Vent-L will protect your plants in the sunny days in the heat and keep a comfortable temperature in greenhouses or polytunnels. Thanks to Vent-L, there is no need to open and close vents and doors in the greenhouse every day, every morning and evening ,it will do it for you.



Viewing Page 2 of 3

View more products in Parts & Accessories.
Feel free to Browse Our Catalog.



Privacy Policy / Terms of Service / Accessibility Statement
© 2019 - halogrowbox.com. All Rights Reserved.