Swimming Pool - Fabric duct
Swimming Pool - Fabric duct
Swimming Pool - Fabric duct
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Design Review<br />
Design Review<br />
High Care Air<br />
0800 999 6677<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting
Design Review<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting<br />
HCA Design Review<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting<br />
High Hi h Care C Air Ai<br />
0800 999 6677<br />
Intro<strong>duct</strong>ion.<br />
<strong>Swimming</strong> <strong>Pool</strong> ventilation designs benefi t from being within roughly the same temperature<br />
zone each time*. Generally the <strong>Swimming</strong> <strong>Pool</strong> room temperature is around 30oc. Supply air is<br />
usually +10okΔt or +12okΔt at most – So normally supply air is delivered at around 40oc.<br />
Therefore the air volume is pretty straight forward to work out once you have the heating load<br />
and the Δt. The most important considerations in <strong>Swimming</strong> <strong>Pool</strong> design (assuming your heat<br />
load calculations and air volumes are correct) is the <strong>duct</strong> positioning (and what they achieve)<br />
and the velocity & direction of the supply air, we discuss these further below.<br />
*This is not the case for Hydrotherapy pools where people often spend a long time immersed in<br />
the water – room temperatures in these areas can often be quite a lot lower.<br />
Location / Routing<br />
Each pool is diff erent, it is normal to position the <strong>duct</strong>s adjacent to the pool around the edge.<br />
We would not normally design systems that place the <strong>duct</strong>s directly OVER the pool as these are<br />
diffi cult to maintain from a CDM point of view (designers risk assessments) and – should it prove<br />
necessary – scaff olding and planking a pool to provide access could prove to be expensive.<br />
It is quite normal for <strong>Fabric</strong> Ducts to follow the shape of the pool, generally around the<br />
periphery. This is achieved using bends or tees made in the same fabric material (bends are<br />
made in a faceted design) which will normally zip into place as required.<br />
Most systems will be made in zipped sections of around 5000mm. This makes installation easier<br />
as sections slide on to the support rails in system order prior to be zipped together.<br />
The sections are lighter as a result which is important when working at height.<br />
The sections are also sized so that they can be washed at a later date (if needed) in a standard<br />
washing machine. An additional benefi t is that individual sections can be unzipped and replaced<br />
if damaged for any reason; in a quick and low cost changeover.
Design Reviews<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting<br />
High Hi h Care C Air Ai<br />
0800 999 6677<br />
Direction of Supply Air.<br />
If possible we would encourage routing the <strong>duct</strong> in the proximity of any windows, glass doors,<br />
skylights etc. This will allow a percentage of the air to be diverted towards ‘washing’ the glazing<br />
with supply air to help remove condensation. As all <strong>Fabric</strong> Ducting systems are made to order it’s<br />
just a matter of identifying the angle at which the air leaves the diff user during design stage prior<br />
to manufacture.<br />
In general it’s fair to say that majority of the supply air is delivered towards the corners (or edges)<br />
of the <strong>Swimming</strong> <strong>Pool</strong> space. The idea is to get the warm air down, but also to mix and entrain<br />
existing ambient air within this pattern to refresh and circulate air within the <strong>Swimming</strong> <strong>Pool</strong> area.<br />
It’s important to note though that even though the supply air is warm, if there’s a stream of air<br />
coming into contact with people who have been in the water, they will possibly feel a draught<br />
and/or cold as the air passes over the body. In this case, if possible, majority of the supply air<br />
would wash down a wall (which may incorporate windows) directly behind and below a <strong>duct</strong><br />
located around the pool periphery.<br />
Having said all of this, it’s also important to note that Volatile Disinfection By Pro<strong>duct</strong>s (DBP’s) can<br />
also occur in <strong>Swimming</strong> <strong>Pool</strong>s as the chlorine in the water reacts with sweat and urine.<br />
The volatile by pro<strong>duct</strong>s can cause respiratory & eye irritation. These can evaporate out of the<br />
water and sit just above the pool surface. If there is no air movement generally within the<br />
<strong>Swimming</strong> <strong>Pool</strong> the DBP’s can form a layer above the pool or (if the pool is generally very active)<br />
they can migrate to the edges and walls where less air movement and activity occur. We would<br />
always recommend if possible to take a small percentage of supply air and allow it to wash over<br />
the pool surface or in that general direction. In doing this one needs to consider draughts again &<br />
of course evaporation of the pool water – therefore only a small percentage of the overall volume<br />
should be used for this purpose. If majority of your supply air is aimed at walls which are only a<br />
metre or so away from the edge of the pool, then this air should fl ow out and across the pool and<br />
there will be no need to add an air pattern across the pool separately.
Design Reviews<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting<br />
Materials Choice (corrosion).<br />
Now that we’ve discussed the design specifi cs it’s important to<br />
understand the drivers behind the choice of <strong>Fabric</strong> Duct as<br />
opposed to more traditional material types.<br />
The traditional material used for <strong>Swimming</strong> <strong>Pool</strong> air delivery is<br />
Galvanised Rigid Duct; which needs to be painted and is quite<br />
often insulated or covered with a protective material.<br />
The pool environment is quite corrosive to metals other than<br />
stainless steel, which makes <strong>Fabric</strong> Duct; created from 100%<br />
woven polyester, such a good choice for these applications.<br />
<strong>Fabric</strong> Duct doesn’t corrode (or dent) and is available in a<br />
variety of colours from stock, it’s also an aesthetic and eye<br />
catching way of supplying and delivering air in the <strong>Swimming</strong><br />
<strong>Pool</strong> environment.<br />
Because <strong>Fabric</strong> Ducting is light weight it requires less<br />
secondary steel support and takes a lot less time to install than<br />
a rigid <strong>duct</strong> – probably in most cases around 1/10th the time.<br />
One can imagine the savings on installation alone let alone the<br />
savings on material costs without having to paint/coat or<br />
insulate the rigid <strong>duct</strong> inside the pool area.<br />
Because the system is always providing warm air to the<br />
<strong>Swimming</strong> <strong>Pool</strong> environment it is normal to use a<br />
NON PERMEABLE type of <strong>Fabric</strong> Duct, this looks the same as a<br />
traditional permeable <strong>Fabric</strong> Duct (with a matt fi nish) but has<br />
a weave so tight it doesn’t allow air to permeate through the<br />
material.<br />
The advantage in using NON Permeable material is that none<br />
of the air is lost through the weave – the <strong>duct</strong> delivers 100% of<br />
the air through the laser cut diff users selected specifi cally for<br />
that project, and down into the occupied zone.<br />
High Hi h Care C Air Ai<br />
0800 999 6677
Design Reviews<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting<br />
High Hi h Care C Air Ai<br />
0800 999 6677<br />
Benefi ts with using High Care Air.<br />
Apart from understanding your application and the solutions needed we also supply a pro<strong>duct</strong> with<br />
fantastic features which have been developed specifi cally for <strong>Fabric</strong> Ducting applications (rather than<br />
adapted to fabric <strong>duct</strong>ing applications). These include 9 colours from stock at no additional cost
Design Reviews<br />
<strong>Swimming</strong> <strong>Pool</strong> <strong>Fabric</strong> Ducting<br />
Summary – Bullet Points.<br />
High Hi h Care C Air Ai<br />
0800 999 6677<br />
• Generally 30oc room temperature<br />
• Generally 40oc supply air temperature<br />
• Therefore 10okΔt (or less) temperature diff erence is preferable<br />
• Think about the aesthetics of your material choice & the 9 stock colours that are available (free)<br />
• Locate <strong>duct</strong>s adjacent to (but not over) the pool if possible<br />
• Locate <strong>duct</strong>s in the vicinity of any glazing/glass if possible to allow air washing for condensation<br />
• Entrain and mix the air with majority aimed at walls<br />
• Keep velocity low around people<br />
• Try to wash air over the pool gently to disturb DBP’s<br />
Thank you for taking the time to read our recommendations. We are aiming to give a general<br />
guidance for the design considerations when using <strong>Fabric</strong> Ducts in <strong>Swimming</strong> pools.<br />
If you spot any mistakes or omissions please do not hesitate to get in touch and let us know.<br />
- Design<br />
- Supply<br />
- Installation<br />
- Maintenance<br />
- Permeable<br />
- Non permeable<br />
- Flame Retardant<br />
- Anti Microbial<br />
- Cleanroom Quality<br />
- 9 Colours<br />
- 10 years warranty<br />
High Care Air Ltd<br />
Bretby Business Park<br />
Ashby Road<br />
Bretby<br />
Burton on Trent<br />
Derbyshire<br />
DE15 0YZ<br />
Tel - 0800 999 6677<br />
info@highcareair.com<br />
www.highcareair.com