Homebox XL 

The Homebox XL is a larger version of the original Homebox (L), giving you an additional 7.75" in width and depth. The top-to-bottom zipper, combined with the side-to-side zippers at the floor and roof, gives you easy access to your garden. 

This portable alternative to a permanent grow room can be assembled in about 25 minutes without any tools! Once your Homebox XL is assembled, you have an indoor greenhouse that is completely sealed and virtually light proof. Dismantling is just as easy, making your Homebox XL ideal for seasonal crops.

The Homebox XL has a metal frame with strong nylon push-lock corners for sturdiness. The tent is a made from tear-proof canvas with a tough interior layer of reflective white PE for high quality light dispersion. The removable floor is water-resistant and washable.

Ventilation holes are located at the bottom of the tent. By utilizing an exhaust fan and charcoal filter at the top, the Homebox XL gives you a chimney drafting effect to prevent odors while providing needed air circulation.

The upper frame of the Homebox XL provides supports your grow light reflector (NO built-in ballasts please). The roof area comes with an attachment to mount an exhaust fan and filter, plus an outlet sleeve for ducting the fan exhaust.

Openings:

Roof = 200mm
Rear Top = 90mm
Right Bottom = 160mm

Dimensions: 47.25" wide x 47.25" deep x 78.75" tall
Weight: 29 lbs.

If you're using HID lighting, sufficient ventilation must be used to exhaust heat.

More info from the Manufacturer (PDF format - Lots of detail.)