What Changes at GrowLab 240 Scale
Eight feet square is four times the canopy of a four-foot tent, and almost nothing about running it scales linearly from there. Interior height stays at 6ft 7in, unchanged from the smaller models, so the extra volume is all floor. The roof cross-members still carry 100 lb, and that number has not changed either. Across this much span it is the figure that decides the build. Boxed weight is 70 lb, which makes assembly a two-person job and relocation a genuine project. The frame is powder coated steel and the lining is silver Mylar. Tent fabric returns 97 percent of radiant heat into a volume large enough for that to matter. A removable waterproof second floor covers the whole footprint and lifts out in one piece.
Why Grow Tents This Size Need Planning First
The roof rating is the sentence to reread. Four fixtures, a filter and a fan hung inside a span this wide sit close to the limit. A tent roof is not a truss. Anything heavy belongs on the ceiling of the room or on a stand, with the tent carrying only what it is rated to carry. Extraction has to be specified against total lamp wattage rather than against the footprint. Air exchange across a space this large needs help from inside as well. Ducting alone will not stir the far corners, and stagnant air at canopy level is where trouble starts. Then there is the room around it. A tent this size wants clearance on at least two sides to zip, service and clean. The space it occupies is meaningfully larger than its own footprint. The honest assessment is that at this scale a purpose-built room is often the better answer, and this exists for people who cannot build one.
Key Features
- Footprint: 7ft 11in square, four times the canopy of a four-foot tent
- Height: 6ft 7in of interior height, unchanged from the smaller models
- Roof load: 100 lb, unchanged, which is the real constraint at this span
- Shipping weight: 70 lb, a two-person assembly
- Interior: A silver Mylar lining that is highly reflective and waterproof
- Thermal: The tent material reflects 97 percent of all radiant heat
- Frame: Powder coated steel, thicker than the previous generation and rust resistant
- Cross-members: Movable, snapping into place so a fixture can be repositioned
- Ports: Multiple intake and exhaust ports with adjustable ducting attachments
- Floor: A removable waterproof second floor, lifted out for cleaning between crops
Technical Specifications
| Specification | Value |
|---|---|
| Model | GL240 |
| SKU | 706850 |
| Brand | GrowLab |
| Exterior dimensions | 7ft 11in x 7ft 11in x 6ft 7in |
| Roof load | 100 lb across the cross-members |
| Frame | Powder coated steel |
| Interior | Silver Mylar |
| Radiant heat reflected | 97 percent |
| Ducting | Adjustable attachments, no clamps or reducers needed |
| Floor | Removable waterproof second floor |
| Off-gassing | None, the material is non-toxic under light and heat |
| Shipping weight | 70 lb |
| Assembly | Two people, given the boxed weight and the span |
| UPC | 4260220920809 |