Prido steel door has a U-value of 1.98 W/(m²K) thanks to 50 mm polyurethane insulation and aluminium frame with thermal break. That is approximately 40% better than doors with traditional steel frame construction. With RC2-rated burglary protection, 7-year warranty and air permeability class 4, high performance is combined with long service life – resulting in low total cost of ownership compared to simpler industrial doors.