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My modus operandi with inline fans has always been to buy the complete kit from the wholesalers.I always go for highest wattage. Nothing as pleasing as watching a sheet of toilet paper stuck to the grill when extractor fan operates. I normally connect fan with flex first and check its operation before installing it in the attic. If fan has a timer I make sure homeowner decides the overrun time before I install it. It can be a nuisance mucking about with a fan timer in a small attic. Lastly a little rubber placed between the fan and the wooden grounds it's mounted to reduces vibration and noise.
soooo do you use the inline fan with just a grill mounted in the ceiling of the bathroom then? you don't use the inline + ordinary extractor fan? could you link me the kit pleaseeee
 
soooo do you use the inline fan with just a grill mounted in the ceiling of the bathroom then? you don't use the inline + ordinary extractor fan? could you link me the kit pleaseeee
Apologies. Misunderstood your question. Your phrase "inline + ordinary extractor fan" is unfamiliar to me. An inline fan by definition is "in the line" of air extraction with a flexi connected to the ceiling grill in the bathroom and a flexi connected to the wall or roof outlet. An ordinary extractor fan has a flexi on one end only. Don't have any links to hand but it's a standard item in any wholesalers
 
Apologies. Misunderstood your question. Your phrase "inline + ordinary extractor fan" is unfamiliar to me. An inline fan by definition is "in the line" of air extraction with a flexi connected to the ceiling grill in the bathroom and a flexi connected to the wall or roof outlet. An ordinary extractor fan has a flexi on one end only. Don't have any links to hand but it's a standard item in any wholesalers
so from the grill, how far into the flexi ducting do you install the in line fan? would you recommend straight duct over flexi duct if it is possible? because of the air flow resistance when hitting the grooves of the flexi duct?
 
Its not the airflow resistance on flexible ducting I find that is the problem, but the condensation that occurs on the grooves if extracting from a bathroom or kitchen, condensation trap and drain needed, if possible I try to always use solid duct, not popular as its more difficult to fit and takes time, any inline fan I also suspend from the rafters in a loft installation as this cuts down the noise considerably.
 
Its not the airflow resistance on flexible ducting I find that is the problem, but the condensation that occurs on the grooves if extracting from a bathroom or kitchen, condensation trap and drain needed, if possible I try to always use solid duct, not popular as its more difficult to fit and takes time, any inline fan I also suspend from the rafters in a loft installation as this cuts down the noise considerably.
There is no rafters, this is a flat with a concrete ceiling above the plasterboard. Would you say to suspend it from the concrete ceiling then? Can I not put it in a big enclosure to trap the noise? Suspending seems like a lot of work
 
so from the grill, how far into the flexi ducting do you install the in line fan? would you recommend straight duct over flexi duct if it is possible? because of the air flow resistance when hitting the grooves of the flexi duct?
Straight duct is always preferable but circumstances may limit its use. Your exit hole location (roof, wall or soffit) and your extract fan location will determine what you use. You will want to keep your duct run as short as circumstances allow. From the grill I normally mount the fan approx 2 to 3 feet away using flexi.If the exit is through the roof then I use another section of flexi. If the exit is through the soffit (or wall) it's usually a longer run and here is where straight duct is useful to provide a nice sloping flow to the exit hole with the final foot again in flexi
 
Straight duct is always preferable but circumstances may limit its use. Your exit hole location (roof, wall or soffit) and your extract fan location will determine what you use. You will want to keep your duct run as short as circumstances allow. From the grill I normally mount the fan approx 2 to 3 feet away using flexi.If the exit is through the roof then I use another section of flexi. If the exit is through the soffit (or wall) it's usually a longer run and here is where straight duct is useful to provide a nice sloping flow to the exit hole with the final foot again in flexi
Okay got you! its possible for me to use a straight duct as the rest continuation of the flat pvc duct is above the existing fan location. When doing a 90 degree bend into the duct would you recommend putting 2 x 45 degrees together then for the swooping like you said?
 
Straight duct is always preferable but circumstances may limit its use. Your exit hole location (roof, wall or soffit) and your extract fan location will determine what you use. You will want to keep your duct run as short as circumstances allow. From the grill I normally mount the fan approx 2 to 3 feet away using flexi.If the exit is through the roof then I use another section of flexi. If the exit is through the soffit (or wall) it's usually a longer run and here is where straight duct is useful to provide a nice sloping flow to the exit hole with the final foot again in flexi
Or Lord mount it straight onto an external wall.
Do you install a 3amp fuse inline of your extractor fans? they show on the installation instructions to do it...
 

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