Fläktförstärkt självdragsventilation. TrygghetsVakten FFS Mellan
TrygghetsVakten FFS is a ventilation system designed for long-term, nearly maintenance-free operation. It improves air quality and is built to be quiet and durable.
- The description claims that the system stops frost damage to the chimney and meets Boverkets ventilation norms.
- The description claims an up to seven-year product warranty that can be extended to ten years.
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