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Improving bathroom ventilation.

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  1. #1
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    Default Improving bathroom ventilation.

    This has already been asked i am sure, but I cant find any thing specific in the search results.

    Our bathroom is very damp, we have been fighting mold since we bought the place and we recently panted the room thinking it was mainly a result of the wrong paint and a closed room.

    But the paint is already showing signs of water marks on the walls.
    No mold but i am sure it will return if i dont sort the problem.

    Currently whenever we use the bathroom we leave a window open and use the fan in the roof, it is one of those heater thingies with the four heat bulbs and a light in the middle, the fan measures to 200mm, and there are two vents in the corners of the roof.
    Additional there is a whirly vent directly above the bathroom on the external roof.

    None of this seems to help, I have been looking at replacing the heater unit thinking that maybe its not working like it should.
    Its a pretty cheap looking one with "Bathroom buddy" written on it.

    Looking at the biggest IXL Tastic we found at bunnings a Classic Silhouette.

    Will this improve my situation or am i throwing money at the wrong places?

  2. #2
    Je pense, donc METRIX's Avatar
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    You are probably better off with a seperate fan, the all in ones are usually a compromise.
    A good quality high CFM fan is your best bet, and mounted closer to the shower (not directly over it) so it can extract quicker.

    I would also have a timer model (BTW bunnings don't stock these types of fans, you need to go to a ventilation type outlet), the timer will allow the fan can run for a few minutes after use, this will ensure it gets most of the moisture out.

    You mentioned you have the window open when you use the bathroom, does this mean you close it when you leave the room ?
    If so this is contributing to your problem, a bathroom needs constant vantilation and the best way is to have an open window so fresh drier air can enter the room drying out the condensation.

    If you close the window and turn the fan off when finished, this will guarantee mold problems to happen.

  3. #3
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    Quote Originally Posted by METRIX View Post
    You are probably better off with a seperate fan, the all in ones are usually a compromise.
    A good quality high CFM fan is your best bet, and mounted closer to the shower (not directly over it) so it can extract quicker.
    Thanks Metrix.
    The Window is opened all the time but you are right we are guilty of turning the fan off shortly after a shower.

    I am not sure a separate fan would be fesable it is very small room with little real estate on the roof, the all in one unit we have is already very close to the shower.

    but maybe one further a way might be a goer, I looked at ones which are ducted but i dont know if the roof cavity would allow for this and our soffits are asbestos so i dont want to go cutting them to put external vents in.

  4. #4
    Je pense, donc METRIX's Avatar
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    We use either Blauberg German made, exceptional quality 5 year warranty, or Airware, never had problems with either.

    AW907 is good value and good performance 2 year warranty
    Airware Products - Just Ventilation

    Quatro is unobtrusive, low noise and good performance
    Blauberg Products - Just Ventilation

  5. #5
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    Hey Metrix also interested in a good ventilation fan system. Don't want any glass fogging up at all even when shower is running really hot. so something powerful. Looking though for an inline fan system or some extraction fan system that can be mounted and concealed in ceiling/roof space and then ducted through to a custom or standard plenum (depending on what is available) and inverted bar grille mounted to ceiling. what would you suggest? would this be a good idea? Refer to below images for located and length of bar grille. obviously the whole grille doesn't have to be extraction. I can have plenum just vent through half the grille if that's all that is required. 8652685557_8039a72394_b.jpg 619703.jpg

  6. #6
    Je pense, donc METRIX's Avatar
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    Quote Originally Posted by Renovator22 View Post
    Hey Metrix also interested in a good ventilation fan system. Don't want any glass fogging up at all even when shower is running really hot. so something powerful. Looking though for an inline fan system or some extraction fan system that can be mounted and concealed in ceiling/roof space and then ducted through to a custom or standard plenum (depending on what is available) and inverted bar grille mounted to ceiling. what would you suggest? would this be a good idea? Refer to below images for located and length of bar grille. obviously the whole grille doesn't have to be extraction. I can have plenum just vent through half the grille if that's all that is required.
    We have used these ones for situations where they client did not want any noise, and required higher air flow, these have the motor mounted outside so internal noise is minimal.
    But we did not use a long strip vent as shown in your pics, but we combined with the egg crate vents similar to commercial installations in hotel bathrooms etc.

    Roof Exhaust Fans Archives | Exhaust Fans, Ventilation Fans, Commercial Exhaust - Pure VentilationExhaust Fans, Ventilation Fans, Commercial Exhaust – Pure Ventilation
    Vent Egg Crate Metal Square 150mm | Pure Ventilation


    Other option is an Inline fan, then duct it outside wherever you want.
    In Line Exhaust Fans Archives | Exhaust Fans, Ventilation Fans, Commercial Exhaust - Pure VentilationExhaust Fans, Ventilation Fans, Commercial Exhaust – Pure Ventilation

    For the long vent, best to contact an aircon specialist as they have all manor of roof vents available.

  7. #7
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    Thanks Metrix Great Help.... Might look into both those options. Either way im going to have to have a roof cowl so thinking might as well go all out and get the roof exhaust fans so that no noise can be heard inside. Do you just throw a duct on the end of the roof fan and duct to plenum?

  8. #8
    Je pense, donc METRIX's Avatar
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    Quote Originally Posted by Renovator22 View Post
    Thanks Metrix Great Help.... Might look into both those options. Either way im going to have to have a roof cowl so thinking might as well go all out and get the roof exhaust fans so that no noise can be heard inside. Do you just throw a duct on the end of the roof fan and duct to plenum?
    Yep , you do get some noise but it is minimal.

  9. #9
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    roof mounted fan could be a good choice! I have used one of axial roof fans in the past, they connect to 150mm ducting and seem to be good quality with a good warranty etc:

    Roof Exhaust Fans Archives | Exhaust Fans, Ventilation Fans, Commercial Exhaust - Pure VentilationExhaust Fans, Ventilation Fans, Commercial Exhaust – Pure Ventilation

  10. #10
    Community Moderator phild01's Avatar
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    Hey Metrix, old thread but do you still think the Blauberg is a good fan. Now looking at the Quatro 150 and after looking around they seem good value, would prefer the Fantech Silent ones but they are a bit big to look good on the wall and their similar styles design range is actually noisy according to their specs, the others are quiet.
    I've given up on my new Xpelair, put loctite 480 on it with a wire thread and it is now out of balance and sounds terrible.

  11. #11
    Je pense, donc METRIX's Avatar
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    The Blauberg are good stuff the 150 is a good fan with lower dB but extraction is only just over 300, depending on your room and how much steam is emitted may not be enough.
    Can you do an inline version or is it going directly outside.

    I have a 750 cfm in the ensuite and the room still gets steamed up, I think it has something to do with the 3.6m ceiling in there, previous one was a 400cfm and was like being in fog, the 750cfm does a good job but still doesn't get everything before the mirrors get foggy on these cold mornings.
    Mieux vaut prévenir que guérir

  12. #12
    Community Moderator phild01's Avatar
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    The Xpelair of similar air movement worked well when it did. The room is small of about 10m3. Extraction is straight through the wall under a balcony, so I suppose placing a duct onto a joist and using inline fan is possible, not sure if the noise reduction and work to do is justified,

  13. #13
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    ppsnake, does the current fan suck air out if the door(s) are open? I ask because sometimes (well a lot actually ) there is no allowance for the attempted replacement of the air by using larger crack under the doors or door vents or other vents. An easy way to tell if there's insufficient replacement air is: Does the fan sound change when you open a air? Also do you feel any drafts in the vents or under the doors?

    BTW. I have one of those IXL Tastic's and it fantastic . You can actually see it put the steam out of the room.

  14. #14
    Je pense, donc METRIX's Avatar
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    Quote Originally Posted by phild01 View Post
    The Xpelair of similar air movement worked well when it did. The room is small of about 10m3. Extraction is straight through the wall under a balcony, so I suppose placing a duct onto a joist and using inline fan is possible, not sure if the noise reduction and work to do is justified,

    I did a 150 inline downstairs and vented it over 12 meters to the outside wall, it works a treat no steam at all, goes through a 150 blauberg eggcrate grill.

    I'm thinking about my ensuite why it generates so much steam, I have one of those big shower heads 400mm, it probably give off so much steam due to surface area of hot water this may be the problem.
    I will swap it down to a 200mm and see if it makes a difference.

    e50eae83-f317-4576-8145-3ebda172a7c1.jpg
    Mieux vaut prévenir que guérir

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