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Conventional ‘aerating’ showers use the Venturi principle to restrict flow and draw atmospheric air into the water through a small hole in the showerhead. This is a very cheap way to reduce the mass flow of water, and aerate it to change the ‘feel’ of the shower, but has no measurable boost in force or performance, regardless of flow rate.
In contrast, Kelda’s patented Air-Powered™ showers use the principles of fuel injection technology. Each shower features an intelligent microprocessor and powerful digital fan which controls the delivery of water and air to the showerhead. Within the showerhead, water is injected into a high-velocity air stream where it is broken up into 100s of droplets that are 2.5X the size of a standard shower. Larger droplets yield larger momenta providing the sensation of more spray pressure, making less water feel like so much more. With 15X more impact than a standard shower, a Kelda shower is more effective at rinsing shampoo out of even the thickest of hair.
A Kelda shower uses around 75W in operation, and less than 5W in standby.
A typical household with four people each showering once a day could save around £291.74 in water bills, and £120.71 in energy bills, totalling £412.46 per year.
This is based on the below assumptions:
1. Shower duration 10.7 minutes – this is the average according to the Bathroom Manufacturers Association.
2. Showering 365 days a year.
3. Gas boiler efficiency 91%.
4. Energy costs are an average according to British Gas Average Bills – gas £0.04/kWh, electricity £0.15/kWh.
5. Water costs – an average taken based on highest (South West Water £5.25/m³, and lowest (Thames Water £2.22/m³). Includes water supply and for foul, surface and highway.
A Kelda Air-Powered™ shower has a flow rate of 5 litres per minute, exceeding compliance.
To meet Part-G of the Building Regulations at the optional ‘higher’ level (110 litres/person/day) an 8 litres/minute shower flow rate is permitted. But what if homes could have showers with a lower flow rate, say 5 litres/minute? That would give more flexibility over WC and tap specification when using the Part-G calculator to demonstrate compliance. And specifying super-efficient showers has a win-win benefit as both water and carbon will be saved. It will also enable the specification of a smaller hot water cylinder – a key consideration when using heat pumps to heat hot water, where a 200-litre capacity cylinder is now commonplace.
Kelda showers are designed to be safe, provided that they are installed, used and maintained in good working order, in accordance with our instructions and recommendations. Installation of this product must be carried out in accordance with these instructions by qualified, competent personnel. Read all instructions before commencing installation.
WARNING! To reduce the risk of fire, electric shock or injury please read the important information listed below.
Kelda Showers Ltd. guarantees its products against any defect in materials or workmanship for a period of two years from the date of purchase (shower fittings for one year).
Your guarantee is only valid if you follow the guidance within this installation and user guide, including the `Maintenance’ section.
50 – 60% reduction
50 – 60% reduction
Lower running costs
Contact us for further information.