The Glow-worm seal can be used in the flue of boilers such as Easicom, Energy, Energy 7, Flexicom, Home, Ultimate 3, Ultracom, Betacom, CXI, Energy 2, Essential, HXI, Sustain, Ultimate, Ultimate 2, Ultracom2, Xtramax, SXI, British Gas, Eden, and Ultrapower.
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