Misguided. Bad experience. Expensive quote.
I had a very bad experience with Ventilatie Flevoland. They asked for pictures of the mechanical box and model before visit. And during the visit the technician says that they don't clean the model (which was clear from the picture). Asked me to pay a huge sum for a mere 20 mins visit, misguided me, and asked me to plan another visit to get the box changed, and gave me an expensive quote.
Found another vendor who was ready to deep clean the existing box, or install a new box along with deep cleaning of all vents for half the price with 5 years warranty (got that done later).








