... Fire-proofing anti-bacteria roof insulation 1. Energy-saving 2. Water-proofing 3. Fire-proofing 4. Elegant outlook ... -span, which will be more fitable for roof heating or wall heating, etc. Usage :Bellsafe-flex (Class B1 ) ... system,and its chilled water pipes,condensate pipes, air ducts, and hot-water pipes of air-condition equipment ... /4", 1", 1-1/4" fire-proofing energy-saving roof insulation