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APL is the parent company of New Zealand’s popular window brands Altherm Window SystemsFirst Windows & Doors and Vantage Windows & Doors.

It is based in Hamilton where it maintains a major design, production and warehousing facility developing, extruding, surface finishing and distributing profiles to over 70 manufacturers around the country. APL was started in 1971 and has grown to become New Zealand’s foremost window supplier, offering a range of residential and commercial window systems, including energy-efficient ThermalHEART products, the APL Architectural Series, Metro Series and the Smartwood composite range. APL also has branch offices in Auckland and Christchurch.