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While many W191 units have been decommissioned over the years, there are still quite a few in service worldwide. Fifteen years ago ARNOLD installed the first Single Layer Insulation System on a W191 with great success.

At ARNOLD, we don't ignore legacy units, we embrace them and keep them running at peak performance with these guarantees:

  • Highest possible thermal performance

  • Maximum reliability

  • Maximum durability

  • Easiest, quickest, and safest maintenance access possible