The RHEEM MFG COMPANY Insulation - Inner Door is designed to enhance energy efficiency in HVAC systems. This insulation material effectively reduces heat loss and noise, ensuring optimal performance. With precise dimensions tailored for specific models, it fits seamlessly into the inner door of heating units. Made from high-quality, fire-resistant materials, this insulation meets safety standards and provides long-lasting durability. Ideal for both new installations and retrofits, it contributes to improved energy savings and comfort in residential and commercial settings.