Window Openers - Blowout Sale! Save up to 65%


Blowout Sale! Up to 65% off on Window Openers at Halo Grow Box. Top brands include USA Tools N More, Juliana Greenhouses, KingFireTorch, ERESMISOL, Green House, Agriculture solution, JOYOOO, iShine, Yosoo, ZKer, GOTOTOP, VKRP Distributors, Haofy, VALINK, Estink, yiyusheng, Aramox, & Taloyer. Hurry! Limited time offers. Offers valid only while supplies last.



GREENHOUSE WINDOW VENT OPENER
By USA Tools N More
In Stock
$56.95

mpn: 1, ean: 0780320743510,

4.1 out of 5 stars with 112 reviews
Greenhouse Window.


Greenhouse Ventomax Window Opener
By Juliana Greenhouses
SKU: #M15856
In Stock
$53.99

sku: M15856, mpn: JU122, ean: 0100000453889,

4.1 out of 5 stars with 37 reviews
JU122 Features: -Product Type:Window and door accessories. Dimensions: -Overall Width - Side to Side:12 -Overall Depth - Front to Back:2.


Automatic Window Opener, Solar Heat Sensitive Greenhouse Autovent Vent Opener Standard-Lifts 15 Lbs
By KingFireTorch
In Stock
$26.99

ean: 0608119788408,

4.6 out of 5 stars with 67 reviews
Automatic Window Opener, Solar Heat Sensitive Greenhouse Autovent Vent Opener Standard-Lifts 15 Lbs Automatic Window Opener Specifications 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 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


ERESMISOL Greenhouse Window Opener Vent Solar Heat Sensitive Automatic Greenhouse Window Open Device Maximum 45cm
By ERESMISOL
In Stock
$38.99
$30.99
You Save: 21%

ean: 7808552545481,

4.4 out of 5 stars with 128 reviews
Type: Automatic Window Opener Operation Area: 15 - 25ºC (60 - 77ºF) Max Open Distance: 45cm/18′′ Max Load: 7kgs/15lbs Package: 1 x Automatic window opener Notes: Cannot be used in automatic ventilation window device of greenhouse temperature above 50℃ environment. Please make sure that your normal greenhouse window open and no block.Material: galvanized sheet.. Operation Area: 15 - 25ºC (60 - 77ºF). Max Open Distance: 45cm/18′′. Max Load: 7kgs/15lbs. Package: 1 x Automatic window


Sidewall Manual Hand Crank Winch Greenhouse Ventilation
By Green House
In Stock
$75.00
$68.00
You Save: 9%

ean: 0667176537916,

4.6 out of 5 stars with 25 reviews
Sidewall Manual Hand Crank Winch for Greenhouse Adopting one-molding and die-casting technique to product the shell,professional,very practical Precise pulley,anti-aging,easy to roll up greenhouse film,save the human resource High-quality chain,will not get rusty,long life cycle,save money Stable and durable screws Easily assembled, even without the professional guidanceSide ventilation for greenhouse,Stainless steel handles, Full plastic resin casing,long anticorrosion time. Big output torque


Agriculture solution Sidewall Manual Hand Crank Winch for Greenhouse Film Ventilation
By Agriculture solution
In Stock
$65.00

mpn: MS-01, ean: 0822416685301,

4.3 out of 5 stars with 127 reviews
1, self-locking, automatically fixed in any roll film position, will not automatically fall. Scroll stability, reliable quality. 2, the shell is made of cast aluminum, cast by a precision molding process from the casting, the quality of its raw materials and casting the top tier brands and domestic synchronization, high surface accuracy. 3, the surface is galvanized outside the spray double rust protection, standard parts are made of stainless steel. 4, speed ratio and torque reasonable to use


JOYOOO Vent Greenhouse Autovent Solar Heat Sensitive Automatic Window Roof Opener Invernadero Automatic Window Opener
By JOYOOO
In Stock
$31.40

ean: 0754610743733,

4.4 out of 5 stars with 61 reviews
Specifications: Maximum window opening 45cmMaximum opening about 30°, depending on adjustment and load. Maximum opening weight 7kg/15lb. Adjustable open temperature range 15°- 25°/60°-77F. 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 window. Do not dismantle the cylinder the opener CANNOT stop by manual.


iShine Univent Automatic Vent Opener Standard - Lifts 15 Lbs
By iShine
In Stock
$87.45
$30.99
You Save: 65%

ean: 0031102801479,

4.2 out of 5 stars with 51 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


Yosoo Window Opener for Greenhouse Solar Heat Sensitive Automatic Vent Opener Lifts 15 Lbs
By Yosoo
In Stock
$28.99

ean: 0763741973469,

4.8 out of 5 stars with 34 reviews
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 the cylinder The opener CANNOT stop by manualAluminum Alloy, Durable and Rust proof.. Guarantees the greenhouse in the suitable temperature and maintains the best growing temperature.. Maximum opening weight 15lb, Maximum window opening 45cm.. Solar Energy:


ZKer Carbon Steel Automatic Window Opener, Automatic Greenhouse Roof Window Vent Opener Lifter Solar Heat Sensitive Greenhouse Vent Opener Sets Standard- Lifts 15 Lbs
By ZKer
In Stock
$36.99
$28.99
You Save: 22%

mpn: 43237-2, ean: 0637045897380,

4.4 out of 5 stars with 117 reviews
Automatic Agricultural Greenhouse Window Opener, Solar Heat Sensitive Window Opener, Vent Automatic Window Roof Opener Set Household ToolFeature:Ideal for your greenhouse window--opens and closes your greenhouse windowas the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheatingNon Electric, uses solar energy, open or close the greenhouse vents as temperature rises or dropsIncluding fittings & installation manualCan be clamped


GOTOTOP Automatic Vent Opener Solar Heat Sensitive Automatic Thermofor Window Opener Greenhouse Lift 15 lbs
By GOTOTOP
In Stock
$34.99

ean: 0611901865553,

4.3 out of 5 stars with 88 reviews
With the automatic window openers, you can be sure of an even temperature in your greenhouse day and night. They allow thermostatic ventilation control through the roof windows of your greenhouseWith the automatic window openers, you can be sure of an even temperature in your greenhouse day and night. They allow thermostatic ventilation control through the roof windows of your greenhouse. The idea is simple - the autovent is usually closed - except when the internal greenhouse temperature rises


Greenhouse Solar Sensitive Automatic Window/Vent Opener Lifts 15 Pounds
By VKRP Distributors
In Stock
$57.88

ean: 0670541879641,

4.4 out of 5 stars with 48 reviews
Gas charged cylinder and piston rod, opens and closes window along with double spring action. Opening temperature range 60 degrees to 77 degrees Fahrenheit Max. operating temperature: 122 degrees Fahrenheit Lift capacity: 15 lbs. 90 degree maximum opening angle 1-3/8'' travel, max. Adjustment knob allows setting Steel and aluminum construction; Overall dimensions: 10-3/4'' L x 3/4'' diameter;Double Spring Greenhouse Vent/Window Opener Lifts 15#.


Haofy Automatic Greenhouse Openner, Solar Heat Sensitive Invernadero Automatischer Window Opener Auto Vent Kit
By Haofy
In Stock
$39.99

mpn: Haofywd7963oxvn, ean: 0700890160999,

4.4 out of 5 stars with 63 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 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


Haofy Carbon Steel Automatic Window Opener Automatic Agricultural Greenhouse Window Opener Solar Heat Sensitive Invernadero Automatischer Window Opener Auto Vent Kit
By Haofy
In Stock
$39.99

mpn: Haofykgap7vw9ch, ean: 0792172597067,

4.2 out of 5 stars with 132 reviews
Item Specifications: Material:Galvanized carbon steel sheet and aluminum 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 openerQuality Construction--Reliable, quality built anodised aluminium automatic window opener for greenhouses.. Automatically-As the temperature changes automatically, maintains the best growing temperature and prevents


Automatic Carbon Steel Greenhouse Window Automatic Vent Opener, Agricultural Greenhouse Window Opener, Solar Heat Sensitive Window Opener, Solar Heat Roof Autovent Vent Opener Set Household
By VALINK
In Stock
$28.70

mpn: B051200005, ean: 0607994115651,

4.8 out of 5 stars with 60 reviews
2 pcs/set Automatic Carbon Steel Greenhouse Window Automatic Vent Opener, Agricultural Greenhouse Window Opener, Solar Heat Sensitive Window Opener, Solar Heat Roof Autovent Vent Opener Set Household Tool 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


Estink Automatic Window Opener,Solar Heat Sensitive Greenhouse Autovent Vent Opener Standard-Lifts 15 Lbs
By Estink
In Stock
$29.99

mpn: JZZ-GWOPENER, ean: 0614405587648,

4.8 out of 5 stars with 40 reviews
Greenhouse Window Opener Kit: Maximum window opening 45cm Maximum opening about 30 degree, depending on adjustment and load Maximum opening weight 7kg/15lb Adjustable open temperature range 15degree- 25degree/60degree- 77F Replacement Greenhouse Window Opener Cylinder: Maximum opening weight 7kg/15lb Adjustable length 33-45cm This products need to be refrigerated before using. Package includes: 1 x Window Opener KitNon Electric, uses solar energy, open or close the greenhouse vents as


yiyusheng Solar Heat Sensitive Automatic Greenhouse Vent Opener Auto Vent Kit Lifts 15 Lbs
By yiyusheng
In Stock
$29.88

ean: 0785416574610,

4.1 out of 5 stars with 135 reviews
Product Description: 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 clamped onto or screwed onto your greenhouse frame. Important notice:Do not use this opener anywhere the temperature will exceed


Juliana Greenhouses Greenhouse Univent Window Opener
By Juliana Greenhouses
SKU: #M15857
In Stock
$44.99

sku: M15857, mpn: JU124,

4.1 out of 5 stars with 57 reviews
JU124 Features: -Material: Polycarbonate greenhouses.-Spring loaded.-Allows thermostatic control of roof vents.-Note: Take care to remove the cylinder during periods with frost as the openers may try to open the windows when the sun warms up the cylinders. If the windows are frozen, this may cause the cylinders to burst due to their demand for getting rid of their surplus energy...


Auto Vent Opener Automatic Greenhouse Vent Opener with Solar Power Sensor and Controllor
By Aramox
In Stock
$22.39

mpn: Aramox7mwy0g5qez, ean: 0715538588424,

4.2 out of 5 stars with 106 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


Taloyer Carbon Steel Automatic Greenhouse Window Opener Solar Heat Sensitive Window Roof Thermofor Vent Autovent
By Taloyer
In Stock
$28.99

mpn: Taloyer12, ean: 6446414448016,

4.7 out of 5 stars with 122 reviews
Notice: 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 window Do not dismantle the cylinder The opener CANNOT stop by manualIdeal 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



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