Contractor has said that bathroom exhaust fan on ceiling to suck up into the above-ceiling area is enough, and that it does not need to be vented out the window. Is this fine?

yep..me myself install in my bathroom

It is fine because you're not cooking inside. It's only to bring out stale air and some smelly air when you do your big business.

should suck out to outside. else ur ceiling will be moisture, eventually have mold problem on entire ceiling..

NO NO... NO , over the time, u dont want all the smelly air & moisture trap inside the ceiling right

do it proper way, ducted it to out side tru roof eave, won't cost u much lar

What go in must go out. Common sense.

If you have suction no out put you strain your fan motor, and forcing moisture to collect and form water. Getty big bottle or container try blowing it do you think is easy? And what happen you release your mouth?

Common sense please.

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Added on July 27, 2012, 4:11 pmIf above your ceiling is roof than is ok, cause roof have opening to outside

This post has been edited by weikee: Jul 27 2012, 04:11 PM

Agree. You can imagine what's like the like of months if not years of constant suction into ceiling space. This is more so if you have hot water, as the moisture is the starting ground for mould development.

In reality although an ideal, sometimes it's cumbersome/troublesome because toilets however have no ventilation outside due to renovation claiming backyard hence closing off vent-out spaces now reclaimed by renovated area/rooms. I've seen them mounting ceiling vent into ceiling space nia. Mine is such but I don't hv plaster ceiling but rely on fixed louvre window veniting into dry area. Installing an extractor fan on the backyard wall somewhat though not ideally deals with the air/odor wafting out away from the dry area.

In that scenario, for health reasons, it is proper to duct it outwards with ducted ceiling vents that runs out to the wall of the backyard.

For condo and apartment toilets with casement window of leaf opening up-down type, just install glass mounted suction fan.

Same for landed with the same window configuration or else just bore through masonry with exhaust fans. Some like KDK/Panasonic has one model, En (4"/10cm) and Zen (6"/15cm) extractors which is for areas that have very little overhang from roof. This series have an accessory hood that elbow downwards on the exterior to prevent rain infiltration.

Edit: One practical matter is unless you hv additional switch point for extractor fan, what I did was to branch it off the toilet light point. Hence can leave fan on while light can turn off. Otherwise in the long run cost $$$ to vent cos light must still run. The other alternative is to install pull switch for light with the obvious drawback of having to grope for it in the dark to turn it on.

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Added on July 27, 2012, 4:34 pmWithout outside roof, venting into ceiling space esp if ground floor toilet causes back pressure on the fan. The miniscule dirt and mold spores could be blown out due to backpressure.

Venting into roof space should be ducted with a roof vent/duct otherwise moisture build up inside here could affect lifespan woodwork holding up roof.

This post has been edited by halcyon27: Jul 27 2012, 04:39 PM

Is it necessary to have exhaust fan in the bathroom? I didnt put any, nobody say and i didnt notice...

can consider positive air also. not necessary suck.
just push air from room into bathroom. naturally it will escape thru window.

No, vent it out with duct or PVC pipes. Moisture trapped in the ceiling promote mould and bacteria growth. If the air is just lingering around the ceiling area, then might as well don't do exhaust fan. If the air has no where to go above the ceiling, what is the difference when the air is trapped in the bath room without window or exhaust fan. Your big business smell will still goes down to the bathroom after you off your exhaust fan cum light.

If you can open the bathroom window, it is not neccessary.

and dont cut corner by joining 2 bathroom exhaust into 1 outlet
the big business smell will permeate to the next bathroom

Roof is not critical because day time the heat will actually dry the humid.

Ground floor is a must to put ducting, if no ducting or opening, better don't put any vent fan.

In the case of roof tiles, perhaps the gap promotes air exchange then should be ok. But my preference would still be to duct it to a roof vent like those constructed for cooker hood but adapted for roof use.

In this case, I'm thinking more towards those ground floor extension in which the roof is built using corrugated zinc or steel kliplok types where it's not so "permeable" ie movement of air from inside roofspace outwards is restricted. It's true that daytime heat will cause the air to be able to hold more moisture (increased vapor pressure) but in the situation of a zinc or kliplok roofs, night time will spell trouble as the excess moisture in the air will condense as it gets cooler in the night hours. This affect something the vapor condenses upon.

This post has been edited by halcyon27: Jul 27 2012, 05:12 PM

Of topic, for roof tiles with wood truss, is really dry after some years. I know this because I apply anti termite chemical to my house roof truss. The wood absorb like sponge and not a single drop of chemical drop/slip out.

Ok, good to know. How old is your place?

Mine is build in the mid 70s and when I bought it went up to inspect. At that time when solar heater and plumbing was done, it was oozing out 'oil' even after 35 years due to excess heat in roof space. Had to put two turbine ventilators and then noticed that it hasn't been oozing since.

One thing to note about our climate that being a rainforest tropical, relative humidity is highest around 4-7am. Can get to about 90% which explains in some places, mist (kabus) in the morning.

This post has been edited by halcyon27: Jul 27 2012, 05:45 PM

yeap. its fine.



either way. It need to vent out turn roof eaves.

This post has been edited by KVReninem: Jul 27 2012, 06:08 PM

thank you for the discussion, i neglected to mention that this is a condo.
there are windows in the toilet which will be open most of the time, and outside of these windows are 2 a/c compressors.

Just use circular exhaust fans that can be mounted on the window itself.
http://www.kdk.com.my/ventilating-fans.asp?sid=9

Right...so what is the purpose of the exhaust fan again?

Thanks, does anyone have a pic of how this is mounted?
edit: found some



additional airing of the bathroom, methinks.

This post has been edited by jerm: Jul 30 2012, 11:55 AM

How do you install a exhaust fan if the vent wall has no ledge outside (condo)? I guess they can drill the hole and install the ducting from inside but how do they install the hood to protect insects/bird from flying into the vent hole ?

This post has been edited by tZZ: Aug 11 2013, 04:16 PM

anyone knows if this panasonic ventilating fan can be installed directly on a glass window?

http://www.panasonic.com/my/consumer/home-.../fv-15egk1.html

There have the window mount type. Round shape 1. --> http://www.panasonic.com/my/consumer/home-...n/fv-15wu4.html

yes but no grills to prevent little fingers from getting cut....

No problem sir.. --> http://www.airegard.com/vent-compact-series.html

Ooh...this looks good ozak. Thanks
Any idea what is the price?

Don't no wor.

I ask before others model. I think cost about RM3XX. This brand have many dealer in here. Puchong area quite a lot.

Just googled, around 188. The panasonic around 177. Thanks

how much charges for installing including cutting hole in window?
any requirement on min window size(of course bigger than d fan..)

thanks

i installed ceiling type exhaust fan to my bathroom in first floor. no ducting. straight towards ceiling. installer says no need. coz the roof is high and big enough

for ground floor, ceiling is different from first floor. so installer install the window type which installed on the glass and suction towards outside

how do you install vent fan on the glass? can post picture how its looks like?

glass mount exhaust fan, very common nowadays:

Already have window still need exhaust fan?

Anyone knows of a way to hide these wiring of window exhaust fans?

Exhaust fan is good , i don like open window because insert will fly in , for condo i dunno , but my is landed house , cicak will coming in


my house 4 toilet + 1 kitchen all install exhaust fan

This post has been edited by chongkiatz: Nov 17 2014, 12:09 PM


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Especially if you use water heater when bathing... LOTS of moisture will be sucked up...

Why so ugly the fan?

Exhaust fan is something like that , how beautiful u expect bro?

Kasi nice nice looking la. Spoil your bathroom nice design ma.

This 1 look like oversize and cincai paste only.

No simply paste la bro, i option the tukang to put at most left/right size rather than middle , a house is use to stay , if wan pretty u really need skip the exhaust fan , whatever exhaust fan won't make ur toilet look pretty unless u putting ur exhaust fan on ceilling , and the size is 10inch , there is smaller one but i rather choose big than small because bigger is more effective , as i say the house is use to stay not show room


I'm enjoying to open hot shower without bluring my bathroom mirror Unlike those hotel or without exhaust fan , just bath 5 minutes whole room feel warm and mirror start haze

This post has been edited by chongkiatz: Nov 17 2014, 02:04 PM

This 1 look better --> http://www.airegard.com/vent-compact-series.html

Insects will fly in via the gap between gaps too, right?

Lol the exhaust fan can be suck out insects right

Normally there is a flap close by gravity when is the fan off.

Im putting grill too, i think this type of exhaust fan i cant take off to wash?


How much does this exhaust fan cost?

Nop it cant come in, because when u off the exhaust fan, it will close down the cover, from my old house using this brand Khind , now moving new how so stil choose this brand, more common, less problem, and most important is the price is cheap too

Exhaust fan is a must for bathroom, its pity for 2nd person to use the toilet after the first one use , i hate when going in the toilet feel warm or after the smell after big project =.=

This post has been edited by chongkiatz: Nov 17 2014, 03:58 PM

I think the front is a cover only. You can install yourself also. Freaking easy.

I think the price is rm188. You can ask idoblu.

wow , RM188 , my one cost me RM6x only But the out look really look better than the common exhaust fan la , but i can buy 3 pcs And 1 more thing is i need to put the Grill on the window , so actually after putting the grill , whole toilet already look not really nice le , landed house without grill is dangerous even my 2nd floor room1/room2/master room toilet also install grill

I got think to go for glass exhaust fan before , but the wayar will gantung at the middle like that , not really look good , summore very small , also dunno effective or not , so i ask tukang which size i can fit nicely to my window , and we found that 10inch is the ideal size , ngam ngam upper and lower , and the wire can hide if i put most left/right side







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You can made a 8" opening on the wall and install the exhaust fan, this way you have a neat installation, and the exhaust fan don't need a grill. Unless you worry someone can go through the 8" opening. This way made the house neat. Don't have to be nice, but making it neat is good. After all is a house you going to stay.

You can bore the hole at the wall beside the window. More nice look right? Than you can full grill the window nicely. If you insist on window glass, than put it at the corner of the glass window. So no see the wire lor.

Than don't make the grill like jail la. Give some modern nice looking grill. Kasi interior design sikit ma.

This old design exhaust fan is already grandmother design. See also boring liau.

When i bought this new house , all 4 toilet already build up tiles for me , and the each toilet have 2 opening window , from the picture did u see any place stil able to let me break a hole to put an 8inch exhaust fan?


Actually before this i plan to close 1 window up and putting the exhaust fan only , but problem is i can't found same pattern tiles , the contractor of this project already out of stock for this tiles , so i have no choice and this the best solution , no choice =(

i will take my grill picture after the tukang come install

I see.
How often you on the exhaust fan? 24/7?

Nop la , when u turn on the toilet light , the exhaust fan will follow turning on , so when u taking bath the haze will be suck out , and i tell u , u will enjoy singing while taking bath Because u won't feel hot highly recommend to install exhaust fan inside toilet


Tell u , i install exhaust fan in my kitchen even i already have the hoods


If ur toilet stil naked (mean havent renovate anything) , and ur budget allow , go for modern exhaust fan design if u like modern , i have 4 toilet + 1 kitchen , if buy RM188 x 5 = RM940 and installation blah blah RM1k++ already , this exhaust fan i just spend less than RM500 include install




This is how my window look like before install the exhaust fan in the first picture



The 2nd picture is how my master room toilet look like , the grill design will be like this , the gril stil need some touch up , tukang say wait another grill all install and re-paint again



Toilet tiles , plaster ceiling is provided when i bought this new house I save quite alot , but the problem is i can't do any hacking because i don have same tiles design

This post has been edited by chongkiatz: Nov 17 2014, 06:54 PM

i installed ceiling mount exhaust fan. why do i get foul smell whenever i turn on the exhaust fan? there is no odor when it's switched off, only smell the odor (smell like sewer) when it is on.

i opened the ceiling manhole, no smell detected.
it's not coming from the drain floor trap either.

what else could it be ?

When you switch it on, did you open the windows?

When you use toilet during day time, you switch on light too? If not, if do big business during day time, the toilet will smell also right? Can install with 2 different type of switch i.e. follow toilet light switch and also have a separate switch for day time use?

The exhaust fan just suck the smelly air away from bathroom. It will dry up when the sun heat up the ceiling tiles. No need duct. But its different with cooker hood bcoz the air contain oil & fat.

Yeah, partially opened. you are suggesting that the smell is from outside? My toilet is at second storey, if the fan can attract and suck the foul smell from outside, it's really unbelievable. Later i try shut the window and test again

Possible the ventilation fan suck the manhole / drain opening air our / from wash basin. This is only possible if there no U trap beneath it.

Or

Your windows close to the sewage breather pipe. Usually is locate at the roof, but some maybe just outside 2nd floor.

https://forum.lowyat.net/topic/3037822?hl=Timer

No improvement after shutting windows.

I will check out those areas you mentioned. Hopefully can solve it soon, thanks a lot

Means you only on the exhaust fan at night huh.
I also have an exhaust fan in my toilet which have no window. Have to turn it on 24/7, or else get moisture stain on the plaster ceiling.

Smell maybe coming from the WC, floor trap, or basin. Need to use your nose to identify already.

I didn't open the window , just exhaust fan


ya i on my light too, personally i love to switch on the light to make toilet more bright , actually day time from 8.30-6pm also at office , very less use the toilet at day time except friday only (terengganu friday off day) , i using LED downlight very save energy no worry

brother , it will dry up if the sun heat up , but how about raining day?? Who gonna help u heat up the ceiling ?

For my house, I have two bath rooms at 2nd floor, I don't see the need of exhaust fan because the windows is always open, at least 30% opening. Yes some mist will build up after long hot bath, it will just go away after few mins will gone.

All my room have exhaust ventilation fan, it help suck in fresh air at night during rainy day, making my room much nicer to sleep. For ventilation to the roof, roof itself have many opening and airflow will clear up moisture.

You don't on your aircond to sleep?

Rainy day nope. Only switch on AC f its hot day.

I see. Seems like a good practice.

any idea where to buy airegard exhaust fan in kepong area?

Wow.. Very nice the glass mount type. Any Sifu to recommend for installation? I'm stay in KL. :-)

err... can ask from the shop where you buy the exhaust fan, as i'm not familiar with KL...

hi all,

i have a exhaust fan mounted on my toilet window just like the above. However, my toilet still feels very "wet" and already have mold on my plaster ceiling although I just move in 8 months ago.

Contractor previously told me my condo is quite old (14 years) and has house sweat. Whatever bullcrap that is. I even have molds on my PVC in the masterbedroom and shirts which I havent worn for a long time. How do I get rid of molds?

From what you described, I would say that's unhealthy. Which floor are you on? Can you open windows or sliding door if it has a balcony to air it?

To remove excess humidity, dehumudify either with AC (in dry mode) or with a dedicated dehumidifier from brands like Firenzi, Delonghi or Stadler Form's Albert. For window use, if you can get a higher CFM one like 8" instead of 6" that might help.

Although not practiced in a home, those blue lamp thingy that is seen in McD or KFC near the washing area might help if placed in the bathroom above say the mirror. That will help kill mould spores.

Used Aircon would help the temperature more dry.

In toilet just install exhaust fan at ceiling or face to window.
Inside wardrobe can buy Hippo for suck up water

This post has been edited by kimsim: Dec 12 2014, 03:24 PM

Your exhaust fan need to run continue another 15-20min after you comeout. A short period doesn't help. Reduce the flashing bath water or wet area by instal the screen or separate the bath area.

For wardrop, get the hippo or from daiso that absorb moisture. It need to replace after full absorp. Or a electrical heat dryer which I not sure where can get anymore. I m using this.

For room, just aircon is enough.

Cloud be small leak on the floor above. I doubt toilet humid can build mold with exhaust fan running. My bath room don't have exhaust fan, but window are 30% open all the time. So far OK no mold for 3+ year now.

Thanks, I will look into the machines, but they're not cheap as well

Already have exhaust fan. Will try hippo.

Not sure if it is leak because the mold is quite evenly spread across the plaster ceiling. My toilet window is only about 3ft (h) x 1.5ft (w).


Plasma or ionizer doesnt help right? It says prevent mold from forming. Not sure.

Mine is only 2x2

Hm weird, i open it as well. Let me try on the exhaust fan longer.

Doubt it do any help. What is on the top? Your plaster ceiling installed new?

Your house humidity is very high. Must find out the source then only you can resolve your problem.
For temporary measure, you can put some charcoal at those high humidity areas 1st.

It is raining season now. Everyday is high humidity. It is 2x the effort to get rid it.

Also if your bathroom is in shading area which is out of sun path, also Need 2x effort.

I have this kind of area which is always wet. Algae and mold is alway there.

yea new plaster ceiling. well the mold is not like 1 big patch of black. just some stains across it and can see the rusted nails patch too.

Yea, how do i do that...i'm still thinking.

Go check around which area have a damp surface.
Then from there start trace the reason.

Currently i also found heavy condensation on my master bathroom fixed glass panel. Hopefully it is not leakage of aluminium members.

How much labour charge to install an exhaust fan?? One contractor quote me RM200 to install with wiring exposed & use 3 pin plug (no wall hacking, no extra wall socket or switch) & I have to supply the fan myself..!!!

If it doesn't look difficult to you, try DIY. Save you RM200.

have been looking at that, my window is 50*38cm, even if take the big 30cm exhaust fan, need make a custom bracket to fit into the hole and fixt the fan. other parts is easy.

Have you found any decent contractor tat install the ventilation fan for glass type? Means he would knows how to cut the window glass to fit the ventilation fan.

I'm looking for one. Do you have a good contractor's contact?

I believe the original reasoning for ceiling mounted exhaust fan is only when that ceiling is naturally vented to the outside air..

And you are right for condo's where the ceiling is closed the solution is to vent it via side wall opening and windows outside to allow new air to ventilate inside the room..

If i remember correctly i believe ASHRAE recommends an air change of 6x to 10 x for domestic living residences and up to 20x per hour for bathrooms..

You must ventilate to remove the natural buildup of dust mites and moisture.. and for static enclosures like condo's and apartments without professional Architect design the additional mechanical ventilation is compulsory to achieve the required air changes..

I found one by asking around, the uncle tat cut the class stays at Aman Suria.
Not easy to find one, even would cost u easily RM 100 for a cut.

U still wan? hehe...

Yes pls pls. Thanks!!