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Yep, I purchased a silent running Manrose unit similar to the larger unit above and it's a MASSIVE improvement. Also, I made a wooden panel and mounted it in the ceiling rafters just under the tiles upside down positioned just above the bathroom ceiling rather on the upper side of the bathroom ceiling. The previous pump used to vibrate through the ceiling and increase noise, with it mounted this way you can't hear a thing at all apart from air getting sucked out of the bathroom.
Really worth doing this. It was so good I'm going to do the other bathrooms in the same way now.
Also, check the new one has a non-return flap to stop animals and insects climbing through the pipework when it's switched off. Some don't have built in flaps but you can but an in-line one that goes indie the flexi pipe for £2.
To be honest, I wouldn't have thought you need it. That's probably overkill. I have the 245m3/h version in a standard downlight extractor vent over the shower and the speed it clears the whole bathroom now is mad compared to the older version of less than half the size.
So you reckon 245m3/h will hugely outperform the terrible 137m3/h unit then
In my experience yes. Demisted my windows in minutes compared to the old unit which had to run for half hour at least to get the same result.
Trying to find the standard pump I took out, as I'm not sure it was even 137m3/h to be honest. In fact, I think my old pump might have been 85m3/h as per the link below:
My bathroom is not that big really, and the 137m3/h fan is rubbish, might as well not be there at all.
It is working, because if you hold a bit of bog roll up to it, it will hold it, but you need to get it extremely close before it will do so.
I'm tempted to just get the 245m3/h unit from screwfix, i'm sure I could return it if I were unhappy with the extraction.
I fitted the same setup as brownpants. Its great huge diference, no steam on mirror now and sucks brown smells out quick aswell. Only in a small bathroom the old celing mounted one was rubish, barely able to suck a tissue onto it. The manrose I got had 3 speed settings, I ended up on the lowest power/speed. Mounted on a wooden board on rafters in loft and. Only noise i hear is air being sucked out, nothing from motor.
Location: If you're not braking or accelerating you're wasting time.
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The noise was the biggest issue for me with the small ceiling mounted fans.My ones on a timer so if you used the bathroom/en-suite at night the fan would continue to run on for 5-10 minutes and would keep you awake.They have been switched off for years now.
Best thing I did was change the way the pump was mounted. It used to sit on the loft floor screwed to a ceiling joist attached to the bathroom roof, similar to the pic below:
Like this it used to transmit all the noise and vibration into the ceiling which made it a pain.
When I fitted the new fan I measured between the upper roof joists (below the tiles) cut a piece of board and screwed the pump to the underside of the roof so it was suspended above the bathroom ceiling. So any vibration is no longer transmitted to the bathroom ceiling and it's now completely quiet. All you can hear is air being sucked out of the room now. It's great.
Similar to pic below, but mounted on wooden board between rafters instead of that metal bracket.
I'll be honest, I don't know how mine is currently installed, i'm going to assume its on the joist. They have my shower pump in the roof space now too, but i've not been in the loft since last Christmas.
I might just get the guy who done the bathroom installation to fit the new fan
Manrose aren't the greatest and tend to transmit noise along what every its screwed to (if that's a ceiling joist, then the whole upstairs will hear it hum). Mixed flow is not that good for anything but the shortest and straightest length of duct. Either way its better than what you have
Centrifugal in-line will maintain good flow rates even with longish ducts...bear in mind the peak flow ratings of fans are measured with zero back pressure, so stuff like elephant trunk duct and back draught shutters can decrease the airflow significantly with mixed flow and axial fans
Xpelair XID100 is a good albeit more expensive alternative. Centrifugal, built like a tank with plenty of pressure through long twisty ducts .If you want better there is the XID125 and 150...bigger fan, bigger duct, more flow.
Downside is noise, the fan itself it very quiet and doesn't transmit vibrations to whatever its screwed to (joists) but it does have alot of air turbulence noise at the inlet grill...easily sorted using acoustic ducting (Lindab is the best, albeit expensive)
I used 5" 125mm fans for my bathrooms, one is a old Roofvents (now vent axia IIRC) Accoustic Centrifugal box fan (almost silent). The other is a Soler & Palau TD350 mixed flow (pretty noisy without acoustic duct), neither bathrooms ever have steamed up mirrors. I wasn't that impressed about the noise of the S&P so If I had the choice today I'd have a Xpelair XID125 and a metre of acoustic duct, as its a cheaper fan to buy and I needed the acoustic duct anyway.
I'd say the duct length is tiny, now i've not been in the loft to check it, but put it this way, from where the extraction vent is in the bathroom to the outside wall vent is about 6, or 7 foot max
thanks, and easy to install I presume?
I'm pretty sure the ducting I have is the white flexible plastic stuff, but I see loads of pictures with metal looking ducting.
What do you have?
thanks, and easy to install I presume?
I'm pretty sure the ducting I have is the white flexible plastic stuff, but I see loads of pictures with metal looking ducting.
What do you have?
Yep, it was a very straightforward install for me to be honest. I measured the rafters and cut a piece of board and screwed the new fan assembly to the board so I was ready to go, also pre-drilled 4 mounting holes ready so it was just 4 self tapping wood screws left to mount it up in the loft. The wiring was simple, old pump wired as per new one so only had to isolate electrics, re-make ends of wires, poke into new pump and wire down. All my pipework was the flexible plastic type and is retained onto the pump with 2 long cable ties either side, doesn't need massive screw down clamps, really not necessary.
OK, was in the loft today.
The fan is not near the bathroom vent, its probably about 6 foot away and is near the vent on the outside wall.
I purchased the manrose 245m3/hr fan on Saturday from screwfix and installed it in place of the old fan earlier today.
Doing the bog roll test, its substantially more powerful than my old fan.
With the old fan if you held a bit of bog roll right up to the vent it would hold it, but you had to put it almost touching before it would hold.
Same test with the new one see it take hold of the paper from about 2 inches.
The new fan seems quite a lot quieter than the old unit also, time will tell I suppose whether it makes a difference or not
That’s a rebranded/copy Manrose axial showerfan. I had one originally, it was useless, I could blow more air through a straw! In the end the fan fell off the motor shaft! Utter shyte and no where near capable of meeting the building regs requirements for bathroom ventilation for even the smallest of rooms.
29 October 2018, 04:41 PM
Bathroom Extractor Fans
That sounds like a plan. Screwfix are very good at taking things back.
