On the left of the picture is a very dusty air duct without nano-coating, while on the right is one with nano-coating which effectively guards it from dust and micro-organisms.
On the left of the picture is a very dusty air duct without nano-coating, while on the right is one with nano-coating which effectively guards it from dust and micro-organisms.
On the left of the picture is a very dusty air duct without nano-coating, while on the right is one with nano-coating which effectively guards it from dust and micro-organisms.
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