Novalab Resistop and Duratop Classic are certified by the U.S. GreenGuard Environmental Institute as no or low emission products for clean indoor air. Both are manufactured from a minimum of 20% recycled materials and contain no hardwoods, tropical rain forest products or heavy metals. In North America these products are rated as suitable for inclusion in GreenGuard certified office furniture and qualify for credits under the LEED-CI system (Leadership in Energy and Environmental Design Rating System for Commercial Interiors). Both products also qualify under the LEED system for use in schools. Resistop is New Zealand's most popular high performance, solid core laboratory worktop and is now in use in over 150 installations in New Zealand. Novalab Resistop and Duratop Classic are tested in accordance with the chemical resistance testing methodology stated in AS/NZS 2924.1 1998 and therefore comply with applicable New Zealand standards.