Reference Design

Agrosphere Classic

The Four-Season Modular Greenhouse

Designed by Thios

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Specifications

Diameter 3.7 m (12 ft)
Floor Area ~9.3 m² (~100 sq ft)
Modules 18
Panel Material Polycarbonate glazing
Estimated Cost $4,500–$6,500
Build Time 2–3 weekends
Skill Level Intermediate DIY
Foundation trailer
Tools Needed Circular saw, drill, tape measure

A trailer-mounted geodesic greenhouse with 18 glazed panels for year-round growing. Maximizes light transmission with optional shade cloth panels and integrated ventilation for passive climate control.

Bill of Materials

Panel and frame components from the Thios construction system. Open in the configurator for a full interactive breakdown.

Modules

18 interchangeable panels

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Frame Fasteners

#10 x 1-1/2 in. Flat Head Wood Screw, 18-8 Stainless Steel, Star Drive 72x
M6 x 25mm Hex Head Cap Screw, Class 8.8 Steel, Zinc Plated 72x

Door Hardware

Mortise-Mount Hinge, 3 in. x 3 in., Stainless Steel, Full Mortise 4x

Foundation & Mounting

3/8 in.-16 x 3 in. Hex Head Bolt, Grade 5 Steel, Zinc Plated (Trailer/Foundation) 72x

Other Parts

M6 flat washers 144x
Door handle set 1x
Panel weatherstripping 18x
Silicone sealant tubes 2x
Trailer tie-down brackets 4x
👤 Designed by Peter Bartsch 20 years in product design
🏢 John Deere · FourKites · Nokia HERE
📜 CERN Open Hardware License v2 Modify, share, and improve freely
🪵 Standard Dimensional Lumber From any hardware store

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