HiTHERM North America LLC is a manufacturer of mechanical insulation for Polyisocyanurate (PIR) products that meets an E84 25/50 rating or a product higher temperature range than the current products in the market. The two primary products are our PIR300° 25/50 and the PIR400°, which meet those needs which offer the best thermal conductivity in the industry, with a lower cost product for mechanical and chilled water systems.