The problem

The original impeller and blades were moulded as one piece, where the blades and hub formed one rigid assembly. Over time, debris eroded the edges, UV exposure caused embrittlement, and vibration from flex fatigue crept in. When one blade failed, the entire impeller had to be scrapped. That meant more downtime, higher cost, and no way to make small, targeted repairs.

The solution

We replaced this single unit with a Multi-Wing Series H impeller, using a custom-designed laser-cut hub plate and retaining disk so that the blades can be individually replaced on site if necessary. The PAG (polyamide glass fibre) blades also provide high durability and chemical and UV resistance as it absorbs impact without cracking.

Why it works better

The modular design makes the fans field-repairable, while the metal-reinforced hub improves strength and balance and won’t need to be replaced anytime soon. This reduces maintenance costs and extends the fan’s life.

This wasn’t just a repair – it was an upgrade. At Inventive Air Designs, we don’t just replace like-for-like – we reengineer for performance and longevity.

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