GSE Dome hydroponic growing dome – full temperature control
27 m GSE air-supported dome (29 m outside width, up to 6.5 m high) with no steel roof structure, housing a 20 m circular hydroponic pool with automatic spacing for about 15,000 lettuces; computer control of temperature, humidity, water temperature, EC, pH and production rate. Version with double-layer ETFE film with shading, sixteen 10 HP air-conditioning units, CO2 supply and backup generator.
- Brand
- Granpa
- Category
- Hydroponic farming
- Manufacturer
- Granpa System Engineering Co., Ltd (Japan)
- Type
- Inflatable hydroponic growing dome
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Key points
Manufacturer
Granpa System Engineering Co., Ltd (Japan)
Type
Inflatable hydroponic growing dome
Dimensions
27 m dome; 29 m outside width; up to 6.5 m high
Growing pool
Circular, 20 m diameter, with automatic spacing
About the product
The GSE Dome by Granpa System Engineering (Japan) is a high-performance inflatable dome for hydroponic lettuce growing.

Granpa
GSE Dome hydroponic growing dome – full temperature control
It is an "air-supported structure": there is no steel roof frame, and its highly transparent film captures the maximum amount of sunlight. It can be set up quickly anywhere: city, mountain or desert.
Inside the 27 m dome sits a 20 m diameter circular growing pool with an automatic spacing system: plants are set on the inner circumference and move outwards in line with the programmed daily harvest, with about 15,000 lettuces growing at once. A computer controls room temperature, humidity, water temperature, EC, pH and production rate, via a graphic operation terminal and automatic mode.
Full temperature control version: double-layer F-CLEAN ETFE film (100 and 60 μm) with shading function plus ETFE protective sheet, 16 × 10 HP air conditioners, CO2 supply system, high-pressure misting, 2.2 kW high-pressure fan with 3.5/4.0 kVA back-up generator and thermally insulated entrance wall. In rain, snow or wind the computer adjusts dome pressure automatically, and if power fails the generator starts by itself to protect the dome.
It also includes a 3-section plant unit, float control for spacing, water circulation with temperature, pH and EC control, heat-pump chiller for the nutrient solution, fertiliser tanks, maintenance bridge, weather station, air compressor and galvanised steel base frame. Options: reverse-osmosis water treatment, wash sink, urethane entrance wall and spiral piles for soil foundations.

Technical data
Technical specifications
Data taken from the manufacturer's catalogue.
- Brand
- Granpa
- Category
- Hydroponic farming
- Manufacturer
- Granpa System Engineering Co., Ltd (Japan)
- Type
- Inflatable hydroponic growing dome
- Dimensions
- 27 m dome; 29 m outside width; up to 6.5 m high
- Growing pool
- Circular, 20 m diameter, with automatic spacing
- Capacity
- Approx. 15,000 lettuces
- Control
- Temperature, humidity, water temperature, EC, pH and production rate
- Covering
- Double-layer F-CLEAN ETFE 100/60 μm film with shading
- Air conditioning
- 16 × 10 HP units
- CO2
- Supply system included
- Power back-up
- 2.2 kW fan with 3.5/4.0 kVA generator

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