Welcome Guest! The IOSH forums are a free resource to both members and non-members. Login or register to use them

Postings made by forum users are personal opinions. IOSH is not responsible for the content or accuracy of any of the information contained in forum postings. Please carefully consider any advice you receive.

Notification

Icon
Error

Options
Go to last post Go to first unread
Webber27742  
#1 Posted : 04 July 2012 17:00:03(UTC)
Rank: Forum user
Webber27742

I'd like to suggest at my workplace getting a wall-mounted fan just to circulate the air alongside the hydro pool, (not a bathroom extractor fan, air temp is important to maintain). Does anyone know of an electrically safe, wall or ceiling mounted fan that can be used in a humid atmosphere? Paul
JJ Prendergast  
#2 Posted : 04 July 2012 17:24:27(UTC)
Rank: Super forum user
JJ Prendergast

Why not look in an electrical retailers catalogue or website e.g. City Electrical Factor or RS Components. Other vendors are available
Webber27742  
#3 Posted : 05 July 2012 10:07:25(UTC)
Rank: Forum user
Webber27742

Thanks - I had look around at online catalogues and various searches but very little choice for intrinsically safe fans for damp atmospheres. I'll take a look at the two you mention, thanks. Paul
bilbo  
#4 Posted : 05 July 2012 12:40:40(UTC)
Rank: Super forum user
bilbo

Webber - it sounds to me like there is something not quite right here. Hyrdo pools need to be at a set temperature and with that comes high humidity - this is why "pool" time is limited. There is a lot of guidance around on the managment of spa & hydrotherapy pools that may guide you but I would be very wary of introducing a fan to circulate already hot and humid air. Hope that helps.
Webber27742  
#5 Posted : 05 July 2012 14:05:21(UTC)
Rank: Forum user
Webber27742

bilbo - thank you. A very good point and maybe I should explain further. I work at a school and college for disabled students (treloar.org.uk). Our therapists work quite a bit around the hydro pool and we have limits on time and drinking water etc. The design is, (as you mention), to maintain both water and air temperature. This is why we don't want too much extraction but have thought a fan may make it more comfortable for students and staff when they are poolside, when there is a need for personal care and hoisting etc. The students are very vulnerable and limiting the time too much would cause some students not to even make it to the water! (15 min turnaround for some students to get into or out of the pool). The fan would indeed push warm air about but would give us another option worth trying. Very good points you make though and I'm grateful. Paul
Graham Bullough  
#6 Posted : 05 July 2012 14:52:21(UTC)
Rank: Super forum user
Graham Bullough

webber It's likely that fans which operate at a safe voltage (say 12 volts) powered from transformers or perhaps even rechargeable batteries are available. If so, they'd be worth a try as a method which avoids the issues associated with higher voltages. If you opt for a transformer-powered fan, you'll almost certainly know to go for one with a longish lead which allows the plug-in transformer unit to be located in an adjacent dry room. Also, for the benefit of other forum users who might be asked to advise about similar situations, please would you consider sharing in due course what success or otherwise you have with this matter?
Webber27742  
#7 Posted : 05 July 2012 15:31:26(UTC)
Rank: Forum user
Webber27742

Thank you Graham. I thought most low voltage would be those little hand-held ones but on your suggestion I looked a few up and may recommend they try this sort of thing first: (and to respond to your 2nd paragraph) ebay.co.uk - item number: 251099173370 (Only £20, may get one for myself!), safer option for the office too. Depending on their trial, I can take it further if required. Grateful for the idea and I admit, I overlooked this simpler and safer option. Paul
paul.skyrme  
#8 Posted : 05 July 2012 18:21:08(UTC)
Rank: Super forum user
paul.skyrme

webber, You do NOT need an intrinsically safe fan. Intrinsically safe is a term used in the electrical industry relating to the suitability for use in flammable and explosive environments. i.e. those covered by DSEAR regulations. What you need is an IP65 or above fan suitable for the environment, this can be LV or ELV, either is OK as it looks by your description either of these would be suitable for the zone it is to be installed within. I would not consider the unit you have linked to suitable for the environment you describe. I suspect that you will find that it gets "plugged in" to ensure it keeps running, thus possibly giving you a low voltage trailing lead adjacent to a "swimming pool", not a good idea! I would contact a suitably competent electrician or electrical contractor, not all electricians and electrical contractors will have the experience and competence to work in "swimming pool" environments, or a competent supplier and get them to source one for you.
Alan Roberts  
#9 Posted : 05 July 2012 20:06:48(UTC)
Rank: New forum user
Alan Roberts

Hello, as an Industrial & Commercial Electrical Contractor we have been asked to look at similar problems associated with a Hydro Therapy Pool Room in a special needs school after many other trades have tried to solve problems with humidity levels that result in discomfort for the students and staff & damage caused to the fabric of the installation and corrosion. The previous attempts at solving the issues have appeared to be a case of trial and error. The installation is classed as a "Special Location" in the current 17th Edition Wiring Regulations so care with the selection of any electrical apparatus is required with particular attention to earthing and as others have written going to a reputable Electrical Wholesaler & Contractor is very important. We had been put in the direction of an article posted on the internet which goes into a great deal of detail on the subject of humidity & temperature associated with Hydro Therapy rooms as part of our research to find several solutions and write a report for our client. http://imtuoradea.ro/auo...3/MECANICA/MACOVESCU.pdf Sorry if this does not help or I have misunderstood your problems but fans as we see appearing on desks everywhere during the summer do not solve the cause of air associated problems they just move it around and the condition management of the air is the clever solution particularly if dehumidification is also required.
Zimmy  
#10 Posted : 05 July 2012 20:10:23(UTC)
Rank: Super forum user
Zimmy

Not forgetting that LV is 230/400V and extra low is ... extra low Volts 50v a/c and all that jazz
Zimmy  
#11 Posted : 05 July 2012 20:11:25(UTC)
Rank: Super forum user
Zimmy

Nice to see you're still kicking about Paul mate and yes.... below 50 ac :-)
Webber27742  
#12 Posted : 09 July 2012 09:19:16(UTC)
Rank: Forum user
Webber27742

Thank you Paul, Alan and zimmy. Paul, sorry if I caused confusion by using 'intrinsic'. Interesting to note the electrical industry use the word for flammable environments. It has a wider definition for those of us outside the industry but it's a good point and your advice is helpful thank you. Alan, clearly a good understanding of the issue and I'll read the linked information with interest. The difficulty I have is to find a very inexpensive solution without affecting the overall system design. As you mention, it's a recognised dilemma for special needs environments. zimmy, thanks. It's sounds as if you know me?? Paul
Zimmy  
#13 Posted : 09 July 2012 17:59:22(UTC)
Rank: Super forum user
Zimmy

Sorry webber mate, I was referring to Paul.Skyrme :-)
Users browsing this topic
Guest
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.