PEF is relatively good, compared to glass wool, glass wool is not recommended to use, which has poor waterproof effect, and try to use rubber instead! Select the appropriate thickness according the local winter temperature, or it will be frozen if it is too thin in winter.
So many air-conditioning installation company will choose this new PEF thermal insulation cotton and rubber and plastic thermal insulation material. Generally many companies prefer to use PEF thermal insulation cotton for duct, and rubber and plastic thermal insulation material for water pipes. Productions can be selected according to each person's favor, but we can't only select the cheap products when selecting, and we should choose guaranteed green products.
It's all right to use rubber and plastic, PEF or glass wool, but it is not recommended to use glass wool which has poor waterproof effect, and try to use rubber! Select the appropriate thickness according the local winter temperature, or it will be frozen if it is too thin in winter.
