Delivery to
goods.your_address
VEVOR US EN/ USD
Select the country/region, language, and currency you prefer for shopping.
Hello, Sign in
Account & Order
Categories
Deals
Deals by Categories
Shop All Shop All Outdoors Outdoors
Appliances Appliances Automotive Automotive
Tools Tools Plumbing Plumbing
Building Materials Building Materials Electrical Electrical
Heating, Venting & Cooling Heating, Venting & Cooling Sports & Outdoors Sports & Outdoors
More Ways to Save
Bulk Savings
Bulk Savings
Clearance
Clearance
Best Sellers
Best Sellers by Categories
Shop All Shop All Outdoors Outdoors
Appliances Appliances Automotive Automotive
Tools Tools Plumbing Plumbing
Building Materials Building Materials Electrical Electrical
Heating, Venting & Cooling Heating, Venting & Cooling Sports & Outdoors Sports & Outdoors
New
New by Categories
Shop All Shop All Outdoors Outdoors
Appliances Appliances Automotive Automotive
Tools Tools Plumbing Plumbing
Building Materials Building Materials Electrical Electrical
Heating, Venting & Cooling Heating, Venting & Cooling Sports & Outdoors Sports & Outdoors
Inspiration & DIY
Inspiration
Inspiration
DIY Projects & Ideas
DIY Projects & Ideas
Member Club
Product Recall
Download VEVOR App
Get $5.00 Off $99.00+ Orders on Your First 3 App Orders
Scan the QR code to download
Home Outdoors Garden Center Greenhouses

Search for "automatic greenhouse vents"

Heating, Venting & Cooling
Outdoors
Building Materials
49 Results
Popular
Categories
Price
Under 30
30 ~ 50
50 ~ 100
100 ~ 200
200 ~ 500
500 & Above
Customer Rating
5 stars only
4 stars and up
3 stars and up
2 stars and up
1 star and up
Special Offers
On Sale
Bulk Savings
In Stock
Pickup
Summer Sale
VEVOR Polycarbonate Greenhouse, 8 x 12 Ft, Outdoor Greenhouse with 2 Vent Windows, Pavilion Styled Greenhouse with Hinged Door, Aluminum Large Walk-in Greenhouse Kit for Outside Garden Backyard
(57)
566.9
566.9
Deal after registering
Member discounted price
0% cash back at checkout.
566.9
Non-PRO Account
566.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Polycarbonate Greenhouse, 6 x 4 Ft, Outdoor Greenhouse with Adjustable Vent Windows, Pavilion Styled Greenhouse with Sliding Door, Aluminum Large Walk-in Greenhouse Kit for Garden Backyard
(57)
254.99
254.99
Deal after registering
Member discounted price
0% cash back at checkout.
254.99
Non-PRO Account
254.99
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Polycarbonate Greenhouse, 8 x 10 Ft, Outdoor Greenhouse with 2 Vent Windows, Pavilion Styled Greenhouse with Hinged Door, Aluminum Large Walk-in Greenhouse Kit for Outside Garden Backyard
(57)
507.9
507.9
Deal after registering
Member discounted price
0% cash back at checkout.
507.9
Non-PRO Account
507.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR 8 x 10 FT Polycarbonate Greenhouse, Heavy Duty Outdoor Green House with Adjustable Vents & Push-Pull Lockable Door, Quick Setup, Aluminum Frame Walk-in Greenhouse Sunroom for Outside Garden Lawn
(57)
498.99
498.99
Deal after registering
Member discounted price
0% cash back at checkout.
498.99
Non-PRO Account
498.99
Save
Non-PRO Account
Almost sold out
Add to Cart
Quick look
VEVOR Walk-in Tunnel Greenhouse, 15 x 7 x 7 ft Portable Plant Hot House with Galvanized Steel Hoops, 1 Top Beam, Diagonal Poles, Zippered Door & 8 Roll-up Windows, Green
(879)
86.99
86.99
Deal after registering
Member discounted price
0% cash back at checkout.
86.99
Non-PRO Account
86.99
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 6 inch Wall Vent Cover, Louvered Square AC Vent Gable Cover, Premium Stainless Steel & with Noise Reducing Rubber Gasket, for House,Bathroom,Garage,Kitchen,Basement (1 Pack, Silver)
(14)
18.9
18.9
Deal after registering
Member discounted price
0% cash back at checkout.
18.9
Non-PRO Account
18.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 20 x 10 x 7 ft Walk-in Tunnel Greenhouse, Portable Plant Hot House with Galvanized Steel Hoops, 3 Top Beams, Diagonal Poles, 2 Zippered Doors & 12 Roll-up Windows, White
(879)
149.99
149.99
Deal after registering
Member discounted price
0% cash back at checkout.
149.99
Non-PRO Account
149.99
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 4 x 10 Inch Floor Registers, 12-Pack Vent Grilles, HAVC Heavy-Duty Walkable Iron Floor Vents, Easily Adjustable Rust-Proof Air Vents Deflector with Metal Damper, Ideal for Home & Office, Black
(17)
57.9
57.9
Deal after registering
Member discounted price
0% cash back at checkout.
57.9
Non-PRO Account
57.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 15-Inch Floor Registers, 10-Pack Baseboard Registers, HVAC Heavy-Duty Walkable Iron Floor Vents, Rustproof Anti-Peeling Air Vents Deflector Adjustable with Metal Damper for Home & Office, White
(15)
103.9
103.9
Deal after registering
Member discounted price
0% cash back at checkout.
103.9
Non-PRO Account
103.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 4 x 10 Inch Floor Registers, 6-Pack Vent Grilles, HVAC Heavy-Duty Walkable Iron Floor Vents, Easily Adjustable Rust-Proof Air Vents Deflector with Metal Damper, Ideal for Home & Office, Brown
(17)
37.9
37.9
Deal after registering
Member discounted price
0% cash back at checkout.
37.9
Non-PRO Account
37.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 6 x 10 Inch Floor Registers, 6-Pack Floor Vents, HVAC 3-Direction Iron Vent Grilles for Home/Office Wall & Ceiling, Rustproof Anti-Peeling Air Vents Deflector Adjustable with Metal Damper, White
(12)
42.9
42.9
Deal after registering
Member discounted price
0% cash back at checkout.
42.9
Non-PRO Account
42.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Greenhouse Air Circulation Fan, 1800 CFM Powerful Air Circulator Electric Fan, 10 Speeds, 3 Switchable Modes, LCD Control, Ceiling Wall Mount, Fast Ventilation for Greenhouse, Patio, Garage
(36)
100.9
100.9
Deal after registering
Member discounted price
0% cash back at checkout.
100.9
Non-PRO Account
100.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 4 x 10 Inch Floor Registers, 6-Pack Floor Vents, HVAC 3-Direction Iron Vent Grilles for Home/Office Wall & Ceiling, Rustproof Anti-Peeling Air Vents Deflector Adjustable with Metal Damper, White
(12)
35.9
35.9
Deal after registering
Member discounted price
0% cash back at checkout.
35.9
Non-PRO Account
35.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 4 inch External Extractor Wall Vent Cover, Square AC Vent Gable Cover, Premium Stainless Steel & with Built-in a Protection Screen, for House,Bathroom,Garage,Kitchen,Basement (1 Pack, Silver)
(14)
19.9
19.9
Deal after registering
Member discounted price
0% cash back at checkout.
19.9
Non-PRO Account
19.9
Save
Non-PRO Account
Only 1 Left, order soon
Add to Cart
Quick look
VEVOR 18-Inch Floor Registers, 10-Pack Baseboard Registers, HVAC Heavy-Duty Walkable Iron Floor Vents, Rustproof Anti-Peeling Air Vents Deflector Adjustable with Metal Damper for Home & Office, White
(15)
108.9
108.9
Deal after registering
Member discounted price
0% cash back at checkout.
108.9
Non-PRO Account
108.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 15 x 6.5 x 7 ft Walk-in Tunnel Greenhouse, Portable Plant Hot House with Galvanized Steel Hoops, 1 Top Beam, Diagonal Poles, Zippered Door & 8 Roll-up Windows, White
(879)
88.99
88.99
Deal after registering
Member discounted price
0% cash back at checkout.
88.99
Non-PRO Account
88.99
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 6 inch Hooded Wall Vent Cover, Square AC Vent Gable Cover, Premium SPCC Steel & with Built-in a Protection Screen, for Roofs,Walls,Outside Duct Exhaust Outlets (1 Pack, Black)
(14)
31.9
31.9
Deal after registering
Member discounted price
0% cash back at checkout.
31.9
Non-PRO Account
31.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 12 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with Smart Programming Variable Speed Temperature Control, 1500 CFM,EC Motor,Timer, for Shed,Garage,Greenhouse Ventilation Cooling,Black
(76)
94.9
94.9
Deal after registering
Member discounted price
0% cash back at checkout.
94.9
Non-PRO Account
94.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Greenhouse Heater, 1500W PTC Fast Heating with Overheat Protection, 3-Speed Setting Small Grow Tent Heater, Electric Portable Heater Fan for Green House, Flower Room, Workplace
(142)
38.59
38.59
Deal after registering
Member discounted price
0% cash back at checkout.
38.59
Non-PRO Account
38.59
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Solar Powered Fan, 20W Solar Panel with Battery Storage, 220 CFM Airflow, Adjustable Panel Angle, 2030 RPM High-Speed, Fast Air Exchange for Greenhouse, Grow Tents, Chicken Coops, Shelters
(36)
55.9
55.9
Deal after registering
Member discounted price
0% cash back at checkout.
55.9
Non-PRO Account
55.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 4 x 10 Inch Floor Registers, 2-Pack Vent Grilles, HVAC Heavy-Duty Walkable Iron Floor Vents, Easily Adjustable Rust-Proof Air Vents Deflector with Metal Damper, for Home & Office, Nickel-Plated
(17)
30.9
30.9
Deal after registering
Member discounted price
0% cash back at checkout.
30.9
Non-PRO Account
30.9
Save
Non-PRO Account
Only 1 Left, order soon
Add to Cart
Quick look
VEVOR Solar Powered Fan, 25W Solar Panel with 220 CFM Airflow, Adjustable Panel Angle, 2030 RPM High-Speed, Flexible Install, Fast Air Exchange for Greenhouse, Grow Tents, Chicken Coops, Shelters
(36)
50.9
50.9
Deal after registering
Member discounted price
0% cash back at checkout.
50.9
Non-PRO Account
50.9
Save
Non-PRO Account
In Stock.
Add to Cart
Deals
Quick look
VEVOR 14 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with Smart Programming Variable Speed Temperature Control, 2000 CFM,EC Motor,Timer, for Shed,Garage,Greenhouse Ventilation Cooling,Black
(76)
83.86
107.9
Deal after registering
Member discounted price
0% cash back at checkout.
83.86
Non-PRO Account
83.86
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR 20 inch Shutter Exhaust Fan, Wall Mounted Attic Vent Fan with Smart Programming Variable Speed Temperature Control, 4800 CFM,EC Motor,Timer, for Shed,Garage,Greenhouse Ventilation Cooling,Black
(76)
170.9
170.9
Deal after registering
Member discounted price
0% cash back at checkout.
170.9
Non-PRO Account
170.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Greenhouse Heater with Thermostat, 1500W PTC Fast Heating with Overheat Protection, 3-Speed Setting Small Grow Tent Heater, Electric Portable Heater Fan for Green House, Flower Room, Workplace
(142)
57.9
57.9
Deal after registering
Member discounted price
0% cash back at checkout.
57.9
Non-PRO Account
57.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Greenhouse Heater with Thermostat, 1500W Fast Heating with Overheat Protection, 2-Speed Setting Small Grow Tent Heater, Electric Portable Heater Fan for Green House, Flower Room, Workplace
(142)
73.99
73.99
Deal after registering
Member discounted price
0% cash back at checkout.
73.99
Non-PRO Account
73.99
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric Space Heater with Thermostat, Heating Tube Element, 25° Adjustable Angle, IPX4 & Overheat Protection, Great for Grow Tent, Greenhouse, Flower Room, Home Office
(142)
78.9
78.9
Deal after registering
Member discounted price
0% cash back at checkout.
78.9
Non-PRO Account
78.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Roof Attic Exhaust Fan, 50W Smart Solar Roof Ventilation Fan with Thermostat, Remote Control, 3000 CFM Airflow Built-in Smoke Sensor with Auto Stop for Cooling and Dehumidification
(42)
258.9
258.9
Deal after registering
Member discounted price
0% cash back at checkout.
258.9
Non-PRO Account
258.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan, 402 CFM 6 inch EC Motor Exhaust Ventilation Fan with 10-Speed, PWM Controller, App Control, Temperature Humidity Sensor, Cooling for Grow Tent, Indoor Gardening, Hydroponics
(203)
89.9
89.9
Deal after registering
Member discounted price
0% cash back at checkout.
89.9
Non-PRO Account
89.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric Space Heater with Thermostat, Fan & High Heat Modes, 25° Adjustable Angle, IPX4 & Overheat Protection, for Grow Tent, Greenhouse, Flower Room, Home Office
(142)
77.9
77.9
Deal after registering
Member discounted price
0% cash back at checkout.
77.9
Non-PRO Account
77.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric PTC Space Heater with Fan, Low & High Heat Modes, 40° Adjustable Angle, Overheat Protection, Portable for Grow Tent, Small Greenhouse, Flower Room, Home Office
(142)
29.9
29.9
Deal after registering
Member discounted price
0% cash back at checkout.
29.9
Non-PRO Account
29.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric Space Heater with Fan & High Heat Modes, IPX4 Protection, 25° Adjustable Angle, Overheat Protection, for Grow Tent, Small Greenhouse, Flower Room, Home Office
(142)
59.9
59.9
Deal after registering
Member discounted price
0% cash back at checkout.
59.9
Non-PRO Account
59.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Inline Duct Fan, 205 CFM 4 inch EC Motor Exhaust Ventilation Fan with 10-Speed, PWM Controller, App Control, Temperature Humidity Sensor, Cooling for Grow Tent, Indoor Gardening, Hydroponics
(203)
79.9
79.9
Deal after registering
Member discounted price
0% cash back at checkout.
79.9
Non-PRO Account
79.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric Space Heater with Fan & High Heat Modes, IPX4 Protection, 25° Adjustable Angle, Overheat Protection, for Grow Tent, Small Greenhouse, Flower Room, Home Office
(142)
59.9
59.9
Deal after registering
Member discounted price
0% cash back at checkout.
59.9
Non-PRO Account
59.9
Save
Non-PRO Account
In Stock.
Add to Cart
New
Quick look
VEVOR Greenhouse Heater, 1500W Electric PTC Space Heater with Fan, Low & High Heat Modes, 15° Adjustable Angle, Overheat Protection, Portable for Grow Tent, Small Greenhouse, Flower Room, Home Office
(142)
32.9
32.9
Deal after registering
Member discounted price
0% cash back at checkout.
32.9
Non-PRO Account
32.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Inline Duct Fan, 205 CFM 4 inch EC Motor Ventilation Fan with 3-Speed Circulation, 10-Speed PWM Controller, Timer-Controlled Operation, Cooling for Grow Tents, Indoor Gardening, Hydroponics
(203)
61.9
61.9
Deal after registering
Member discounted price
0% cash back at checkout.
61.9
Non-PRO Account
61.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan, 6-Inch 402 CFM with Temperature Humidity Controller, Quiet EC-motor Ventilation Exhaust Fan for Cooling Booster, Grow Tents, Hydroponics
(203)
82.9
82.9
Deal after registering
Member discounted price
0% cash back at checkout.
82.9
Non-PRO Account
82.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Inline Duct Fan Kit Carbon Filter, 402 CFM 6 inch EC Motor Exhaust Ventilation Fan with 10-Speed, PWM Controller, App Control, Timer, Cooling System for Grow Tent, Indoor Gardening, Hydroponics
(1)
139.9
139.9
Deal after registering
Member discounted price
0% cash back at checkout.
139.9
Non-PRO Account
139.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan, 4-Inch 205 CFM Quiet EC-motor Ventilation Exhaust Fan, with Temperature Humidity Controller for Cooling Booster, Grow Tents, Hydroponics
(203)
71.9
71.9
Deal after registering
Member discounted price
0% cash back at checkout.
71.9
Non-PRO Account
71.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Inline Duct Fan Kit with Carbon Filter, 402 CFM 6 inch EC Motor Ventilation Fan with 3-Speed Circulation, 10-Speed PWM Controller, Timer, Cooling for Grow Tents, Indoor Gardening, Hydroponics
(1)
123.9
123.9
Deal after registering
Member discounted price
0% cash back at checkout.
123.9
Non-PRO Account
123.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Inline Duct Fan Kit Carbon Filter, 205 CFM 4 inch EC Motor Exhaust Ventilation Fan with 10-Speed, PWM Controller, App Control, Timer, Cooling System for Grow Tent, Indoor Gardening, Hydroponics
(1)
116.9
116.9
Deal after registering
Member discounted price
0% cash back at checkout.
116.9
Non-PRO Account
116.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Inline Duct Fan Kit with Carbon Filter, 807 CFM 8 inch EC Motor Ventilation Fan with 3-Speed Circulation, 10-Speed PWM Controller, Timer, Cooling for Grow Tents, Indoor Gardening, Hydroponics
(1)
172.9
172.9
Deal after registering
Member discounted price
0% cash back at checkout.
172.9
Non-PRO Account
172.9
Save
Non-PRO Account
In Stock.
Add to Cart
Quick look
VEVOR Inline Duct Fan Kit with Carbon Filter, 205 CFM 4 inch EC Motor Ventilation Fan with 3-Speed Circulation, 10-Speed PWM Controller, Timer, Cooling for Grow Tents, Indoor Gardening, Hydroponics
(1)
98.9
98.9
Deal after registering
Member discounted price
0% cash back at checkout.
98.9
Non-PRO Account
98.9
Save
Non-PRO Account
In Stock.
Add to Cart
VEVOR Polycarbonate Greenhouse, 8 x 14 Ft, Outdoor Greenhouse with 2 Vent Windows, Pavilion Styled Greenhouse with Hinged Door, Aluminum Large Walk-in Greenhouse Kit for Outside Garden Backyard
(57)
612.9
817.99
Deal after registering
Member discounted price
0% cash back at checkout.
612.9
Non-PRO Account
612.9
Save
Non-PRO Account
Out of Stock
View Details
VEVOR 8 x 12 FT Polycarbonate Greenhouse, Heavy Duty Outdoor Green House with Adjustable Vent & Push-Pull Lockable Door, Quick Setup, Aluminum Frame Walk-in Greenhouse Sunroom for Outside Garden Lawn
(57)
601.9
543.99
Deal after registering
Member discounted price
0% cash back at checkout.
601.9
Non-PRO Account
601.9
Save
Non-PRO Account
Out of Stock
View Details
Quick look
VEVOR 6 inch External Extractor Wall Vent Cover, Square AC Vent Gable Cover, Premium Stainless Steel & with Built-in a Protection Screen, for House,Bathroom,Garage,Kitchen,Basement (1 Pack, Silver)
(14)
22.9
21.99
Deal after registering
Member discounted price
0% cash back at checkout.
22.9
Non-PRO Account
22.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
VEVOR 8 x 14 FT Polycarbonate Greenhouse, Heavy Duty Outdoor Green House with Adjustable Vent & Push-Pull Lockable Door, Quick Setup, Aluminum Frame Walk-in Greenhouse Sunroom for Outside Garden Lawn
(57)
644.9
592.99
Deal after registering
Member discounted price
0% cash back at checkout.
644.9
Non-PRO Account
644.9
Save
Non-PRO Account
Out of Stock
View Details
Quick look
VEVOR Greenhouse Air Circulation Fan, 5800 CFM Powerful Air Circulator Electric Fan, 10 Speeds, 3 Switchable Modes, LCD Control, Ceiling Wall Mount, Fast Ventilation for Greenhouse, Patio, Garage
(36)
139.9
123.99
Deal after registering
Member discounted price
0% cash back at checkout.
139.9
Non-PRO Account
139.9
Save
Non-PRO Account
Out of Stock
View Details
Quick look
VEVOR 8 inch Hooded Wall Vent Cover, Square AC Vent Gable Cover, Premium SPCC Steel & with Built-in a Protection Screen, for Roofs,Walls,Outside Duct Exhaust Outlets (1 Pack, Black)
(14)
34.9
34.99
Deal after registering
Member discounted price
0% cash back at checkout.
34.9
Non-PRO Account
34.9
Save
Non-PRO Account
Out of Stock
Notify Me Registered
Related searches
6 mil greenhouse film anti drip 15 x 30 polycarbonate panel 12 x 8 greenhouse mesh doors 30 walk in greenhouse 6 mil greenhouse plastic 28x24 6 .mill plant fans greenhouse 36 inch wide greenhouse cover portable houses on 6x8 greenhouse with shelves Walk in greenhouses wooden plant greenhouse register booster 8 x 13 6 x 2 polycarbonate sheet -twin -twin-wall polycarbonate panels 36 x 72 polycarbonate panel 2 x 8
See more
VEVOR Inline Duct Fan, 4-Inch 205 CFM Quiet EC-motor Ventilation Exhaust Fan, with Temperature Humidity Controller for Cooling Booster, Grow Tents, Hydroponics
In Stock.
Add to Cart
1
You May Also Like
Today's Deals For You
Recently Viewed
Tips & Inspiration
Recommended Searches
little greenhouses greenhouse do it yourself plant wall shelf hanging plant shelf hanging window shelf plants above door window first tunnels out door plants crawl tunnels for toddlers polycarbonate poly tunnel oversized outdoor portable sheds play tunnels toddler tunnels walk-in tunnel replacement seals for pop top caravans galvanize planter walk in tunnel greenhouses 12 ft long polycarbonate roofing in door plant polycarbonate sheeting roll 6 ml