Does any group collect data about how many city buildings have greenhouses on their roofs ?
Would the county agricultural agent (USDA) likely have this information ? Could this information be found out through some sort of building permit report. Who would know what was being grown in these greenhouses ? and if any, many use hydroponic systems ? Have any schools, universities become known for this practice ? If glass is no longer used, what is the material of the usual covering, or panels ? Are any of these greenhouses that might exist, producing in a commercial circumstance ?
cityquestioner
If the ghouses are not of a commercial nature and/or the owner/operator not contacted the County Agent, the CA would very likely NOT know of their existance.
Possibly building permits would be issued if the installation was registered as a permanent attachment to the building. Nonpermanent structures do not require building permits.
What is being grown is no doubt known only by those who operate them or have other knowledge of their existance.
Very possibly hydorponic systems are used, however hydroponic systems are touchy to maintain and are not the system for all users or products.
I grew various vegetables on the Horticulture/Plant Sciences building at Arizona State University in a test program with my professor. I have never seen or am aware of rooftop ghouses at institutions. For this type of use, rooftop ghouses are not practicle. For a hobby — go for it.
Glass is still used and is a very efficient light transmitter, but costly. Mostly the use of glass is in the private sector, northern latitudes, in relation to high end estates because glass looks nice. Plastic double wall and triple wall panels are more economical, less maintenance, not as prone to damage, and do not require the beefed up supporting structure that glass requires. Plastic film is very popular among commercial growers due to its lower cost, but is much more fragile and prone to damage and must be replaced at intervals depending upon its grade and thickness.
As to roof installed, commercial ghouses a practice . . . I would think not due to simply accessability and the roof would need be designed for this type of hard wear, including service passages to the roof. Commercial ghouse operations must have tons of stuff produced to satisfy profitability. Accessability must be easy to insure profitabillity. On the ground ranges make this easy, elevation increases costs.
How To Hydroponics – S02E18 Solar Panels For a Greenhouse
|
|
450 LED Hydroponic Grow Light 2 Panels = 28w TRI-BAND $56.58 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Red Blue $105.88 |
|
|
Pro 225 LED 14 Watt Hydroponic Plant Hydro Grow Light Panel 14w Quad Band $31.88 |
|
|
450 LED Hydroponic Grow Gro Light 2 Panels=28w all Blue $56.58 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Red $105.88 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Tri Band $105.88 |
|
|
Pro 225 LED 14 Watt Hydroponic Plant Hydro Grow Light Panel 14w Red Blue Mix $31.88 |
|
|
450 LED Hydroponic Grow Light 2 Panels = 28w QUAD-BAND $56.58 |
|
|
900 LED Grow Light White 4 Panel Hydroponic Veg Clone Bloom Aquarium Lamp 144w $289.95 |
|
|
2pcs 225 LED Plant Grow Light Panel Hydroponic Lamp $169.99 |
|
|
900 LED Hydroponic Plant Grow Light Panel $139.96 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Blue $105.88 |
|
|
Pro 225 LED 14 Watt Hydroponic Plant Hydro Grow Light Panel 14w Red $31.88 |
|
|
Quad-band 450 LED Grow Light Panel Hydroponic Plant Lamp Blue Red Orange White $54.95 |
|
|
Blue Red 450 LED Grow Light 2 Panel 60w Hydroponic Plant Lamp Veg Clone Bloom $149.95 |
|
|
Pro 225 LED 14 Watt Hydroponic Plant Hydro Grow Light Panel 14w Tri Band $31.88 |
|
|
225 LED GROW LIGHT PANEL BLUE/RED LAMP FOR HYDROPONICS – 10 PACK $248.00 |
|
|
450 LED Hydroponic Grow Light 2 Panels = 28w Red/Blue $56.58 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Quad Band $105.88 |
|
|
Wholesale 16x 225 LED Grow Light Panel 224W Blue Red Mixed Hydroponic Plant Lamp $379.90 |
|
|
All Blue 225 LED Grow Light Panel 14w Stimulate Growth Hydroponic Plant Lamp $22.95 |
|
|
Red Hydroponic LED Panel Grow Light 110 225 V 16 Watt $35.99 |
|
|
Red Blue Orange Hydroponic LED Panel Grow Light 110 225 V $105.00 |
|
|
711 Red+Blue LED Grow Light Panel Hydroponic 110V-225 V $107.10 |
|
|
All Blue 450 SMD LED Grow Light Panel 70w Stimulate Growth Hydroponic Plant Lamp $149.95 |
|
|
450LED GROW LIGHT AQUARIUM CORAL HYDROPONIC WHITE PANEL $58.90 |
|
|
Quad-band 225 LED Grow Light Panel Hydroponic Plant Lamp Blue Red Orange White $34.95 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Blue $117.88 |
|
|
2pcs 225 LEDs GROW LIGHT PANEL BLUE HYDROPONIC LIGHTING LAMP PANELS $99.99 |
|
|
Pro 225 LED 14 Watt Hydroponic Plant Hydro Grow Light Panel 14w Blue $31.88 |
|
|
450 LED Hydroponic Grow Light 2 Panel Lot = 28w all Red $56.58 |
|
|
Blue Red Mix 450 LED Grow Light 2 Panel 28w Indoor Garden Hydroponic Plant Lamp $56.90 |
|
|
All Red 225 LED Grow Light Panel 14w Budding Flowering Hydroponic Plant Lamp $32.90 |
|
|
450 LED Hydroponic Grow Light 2 Panels = 28w TRI-BAND $56.58 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Red Blue $105.88 |
|
|
Quad-band 900 LED Grow Light Panel Hydroponic Plant Lamp Blue Red Orange White $109.95 |
|
|
225 LED Grow Light Panel Blue White Hydroponic Veg Clone Bloom Aquarium Lamp 33w $79.95 |
|
|
Pro 225 LED 14 Watt Hydroponic Plant Hydro Grow Light Panel 14w Quad Band $31.88 |
|
|
450 LED Hydroponic Grow Gro Light 2 Panels=28w all Blue $56.58 |
|
|
Pro 900 LED Four 14 Watt Hydroponic Plant Hydro Grow Light Panels14w Red $105.88 |
|
|
Sunshine Systems LEDGP45 GlowPanel 28 Watt 45 LED Grow Light $118.75 GlowPanel45The GlowPanel 45 uses the latest in LED technology to provide your plants with the perfect blend of light suitable for all stages of growth. From seed to flower to fruit. More than four times the output of the original GlowPanel, the GlowPanel 45 uses only 28 Watts of power and surpasses the output of a 250 Watt HPS. It easily provides five square feet of coverage for your garden. The G… |
|
|
Sunshine Systems LEDGP14 GlowPanel 14 Watt LED Grow Light $52.60 GlowPanel LED grow lights provide your plants with a balanced spectrum of light for healthy & vigorous plant growth. GlowPanels consume 80% less energy than HPS or Metal Halide grow lights and produce virtually no heat. They’re great for growing plants and with today’s skyrocketing energy costs, they’re also good for your wallet. GlowPanels are not only economical, they’re environmentally friendly… |
|
|
225 LED Hydroponic Plant Grow Light Panel 14w All Blue $29.02 Package includes: 1 x 225 LED Hydroponic Plant Grow Light Panel 14w all Blue… |
|
|
Hydroponic Little Sun Air Cool 6 Panel German Aluminum Hood Reflector w/ 6” Ducts and Fully Covered Glass Panel $52.95 We are proud to present our all new and improved, professionally soldered, extremely sturdy Little Sun Hydroponic Hood Reflector. This traditional Little Sun style reflector is assembled from galvanized steel and lined with highly reflective German Aluminum which lasts 25+ years. The hood comes covered in a single piece of glass to keep the heat of the bulb within the reflector and allow direct c… |
|
|
Solar Cool Reflector Fan Kit $59.00 Let your reflector shoulder some of the workload with the Sola Cool Solar Powered Fan. The easy-to-install Sola Cool kit works with Hydrofarm’s XtraSun 6 Air Cooled reflector, and consists of a solar panel array (56 mini solar panels) and a fan. The unit easily mounts inside the reflector, which positions the fan in the center of one of the flanges. When your bulb turns on, the fan springs to life… |
|
|
4 Lights/Load Switcher, 240V In, 120V Out, 120V Trigger $239.00 240 V supply (connect to main electrical panel or any 240 V outlet (4 wires) connected to a breaker up to 40 A), four (4) 120 V outputs One 15 A circuit breaker per outlet Safely switch high amperage equipment with low cost timer or controller Capable to power the outlets after a fixed or minimum ON-Delay (0-20 minutes) with optional timer sold separately Capable to power the outlets in 2 or 4 ste… |