Single visit installation within two hours: no specialist skills or additional equipment needed. Suitable for new build and retrofit: chambers can be benched to avoid existing services. More environmentally friendly: no site material waste, no concrete backfill required. Good chemical resistance. Unique drop in furniture fits into ready-made pockets. Five sizes with units that stack to required depth. Duct entry drill guides make it easy to cut in any direction with just a standard holesaw mounted on a cordless drill