What is an unvented hot water cylinder?
An Unvented Hot Water Cylinder is fed with cold water directly from the cold mains and therefore once heated can deliver hot water at mains pressure.
Unvented Hot Water Cylinder Features
Gravity-fed
This is great for improving the performance of gravity-fed showers and baths.
Safety controls
The tank itself is supplied with additional controls to safely dealing with pressurised hot water
Approved accredited installers
Only approved accredited installers are allowed to install these tanks which then are registered with Gas Safe
Insulated & efficient
Very well insulated and their recovery rate is swift making them very efficient
Mains pressure dependent
The better your mains water pressure and flow rate on your incoming mains water supply the better these tanks perform.
Electric immersion or Boiler
These tanks can be heated by both electric immersion heater or indirectly from a boiler of any fuel.
Why consider an unvented hot water cylinder?
Improving Performance
This is great for improving the performance of gravity-fed showers and baths. A word of caution though, the pressure and flow rate at your taps will only be as good as the incoming mains water pressure to the property (in other words the tank doesn’t improve the pressure or flow rate).
Additional controls
Nevertheless, the performance is normally vastly improved compared to gravity-fed systems. The tank itself is supplied with additional controls and the sole purpose is for safely dealing with the pressurised hot water such as pressure reducing valve, discharge valves and pipework.
Gas Safe registered
This is all taken care of by the installer and is why only approved accredited installers are allowed to install these tanks and on installation, the tank has to be registered by the installer with Gas Safe.
How much is a new unvented water cylinder?
Want to get a quote for an unvented water cylinder before making a decision. Get a quote today or get in touch with us on on 0845 460 4800.
Unvented hot water cylinder specifications
VERY WELL INSULATED
The tanks are very well insulated and their recovery rate is swift making them very efficient. Not only this, they save space (no cold water storage tank) with no requirement for expensive and noisy pumps to boost the flow and pressure. Also, no water is sitting around in open tanks in your loft just waiting for dirt and contamination. All your water is direct from the clean mains supply.
PRESSURE AND FLOW RATE
The better your mains water pressure and flow rate on your incoming mains water supply the better these tanks perform. For example, when two or more taps are used consecutively the pressure and flow rate of both taps will reduce to half the incoming mains pressure on each tap. If you have very good mains water pressure this fluctuation will be far less noticeable than if your pressure/flow rate is poor.
PLUMBING CONDITION
Another consideration is the condition/age of your existing plumbing. For example, old taps, showers, ball valves even pipes which are currently under gravity pressure could leak/let bye when exposed to the increased pressure from the mains water. However, this is only likely to cause a tap to drip or a ball valve to let bye and normally nothing more serious than that. These problems can easily be fixed by replacement of these components but nevertheless, it’s wise to be aware of these potential issues before proceeding.
ELECTRIC OR FUEL
These tanks can be heated by both electric immersion heater or indirectly from a boiler of any fuel. The tanks come supplied with good quality immersion heaters so if you already have an immersion electric point they are ready to go. Obviously electric isn’t as efficient as for example gas.
MINIMUM WATER PRESSURE
In short, we at Mulgas would only recommend the use of unvented hot water tanks when you have flow rates of 20 litres/min and pressure of 1.5 bar as a minimum. Although we would also encourage you to seek the advice from the individual manufacturer’s of your chosen tank. Also if your pressure and flow rate are below the requirements this doesn’t need to be the end of the road as extra equipment to overcome this is available such as accumulators and booster pumps, space and cost permitting.
other services we offer
TESTIMONIALS
Our customers have been recommending us to others since 1998. You may not have heard of us before – we do very little advertising – yet each year we install and maintain literally thousands of heating systems for local people just like you.
Bella
The service you provided was excellent. The technician kept me informed of his arrival time. He was friendly, courteous and confirmed that the boiler was in good working order after his service
Valerie Kemp
An excellent service from start to finish has been provided – many thanks.
R. Golan
My thanks for your prompt and efficient attention
Lisa Porter
Mulgas carry out a large number of gas safety checks for us each year. They’re competent in what they do. And we trust them totally
Sally Hanson
The service was fantastic from start to finish. Anton always kept in touch on text as to his arrival time and when he was here he was extremely professional and easy to have around the house. I did look after him with a toasted bacon sandwich and plenty of coffee and biscuits when he was here! All of your team are superb. Helen excellent. Giles excellent. Antonio Excellent. Anton Excellent. You can’t get a better compliment than that. The other thing I think is good for you to know is how complimentary all of the above are about Mulgas and Dave. It is very unusual to have consistent feedback on a company via different people. They are a credit to you but it is also clear Mulgas treat their team extremely well which results in true loyalty.
Mark James
Excellent service from Mulgas again – recommended you before and I will again
Mr Sines
I would not hesitate recommending your company to other people. Once again thank you for a professional service
Tim Rees
…may I take this opportunity to say thanks for a job well done
Louise Beardmore
County Property Management have been using Mulgas for a number of years and we have always found them to be professional, helpful and courteous to both us and our clients.
J C
Thank you very much for the professional manner of all your staff in dealing with this matter. We are extremely grateful…
Catherine Dixon
We have used Mulgas for a number of years and they conduct the majority of the Gas Safety Checks for the Woking office. We have always found them to be efficient and professional and they can often attend to call-outs at short notice.
Matthew Patient
We put our faith in Mulgas to carry out our gas safety checks. They never let us down
ACCREDITATIONS
So, what’s next?
Get a quote today for your new water cylinder or call us on 0845 460 4800 to arrange for one of our skilled engineers to visit your home and discuss what you’d like and find out the very best option.