Strictly speaking, anyone potentially could fit an extractor fan themselves. That doesn't mean to say that potentially anyone should! We can unfortunately say that a fair chunk of in-line fans aren't installed particularly well (genuinely around 80% that we come across aren't great), which leads to poor performance, the fan unit suffering, even sometimes being immersed in fish bowls of water for long periods of time, and of course, water coming back down through your ceiling vent. A competent person will be able to install an extractor fan, which we would define as a contractor who's operatives regularly work on residential ventilation projects, such as extractor fans and PIVs, on a daily basis. Which is why we recommend you consulting a ventilation / residential HVAC specialist to carry out a PIV install. Which is why our clients just end up going for the low risk option and contracting us in to carry out the project.
Nobody wakes up one day and says, "I need extra ventilation", without good reason. Ventilation systems are usually ordered to solve a problem, or to prevent a problem before it occurs. We can fix condensation throughout a property, poor ventilation and removing bad smells in kitchens and w/cs - we can't fix water ingress, leaks or rising damp with ventilation alone.
In a nutshell, we will recommend and install a system we have a warm fuzzy feeling will put a real noticeable dent in the sort of symptoms you're currently experiencing. The sorts of ventilation systems we fit certainly aren't cheap, but they do produce the results, as many of our past clients have come to find out!
