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The lower insulation ring with a 1100 mm diameter is a key component for optimizing boiler thermal efficiency. This ring fits securely at the base of the boiler, preventing heat from escaping and ensuring that the system operates at peak performance. Whether you are upgrading an existing setup or replacing a faulty part, this insulation ring is compatible with a range of boiler models. Its durable construction helps prolong the life of your heating equipment while reducing energy costs, making it a practical choice for both residential and commercial applications.