Hello. I'm looking for a heating cable, between 2 and 5 metres long, to fit in the wolf-hole that serves as the air outlet for my air-water heat pump. When it snows or freezes, the very low temperature of the air coming out of the heat pump turns the snow or rain into very hard ice that lasts a very long time. I'm afraid that when it rains heavily, the wolf hole will fill with water and end up overflowing into the cellar. So I'd like to fit a frost-proof heating cord, but one that is strong enough to withstand relatively prolonged contact with water. A thermostat would also enable automatic switching on. Thanks

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