Combination Vented Hot Water Cylinders
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Introduction
These vessels are ideal for a small flat, or a property with a loft conversion where space is a premium in the loft area. Working to the same principle as standard hot water cylinders, combination hot water cylinders are a neat solution as they combine the hot water vessel and cold water storage tank into one unit.
- Be aware however that these combination cylinders are available in a limited number of sizes between 85 litres (19 gallons) and 210 litres (46 gallons) hot water capacity.
Pros & cons
- Can be fitted by a regular plumber or keen DIYer
- Cheaper than alternative storage systems
- Easier to maintain
- Requires a cold water storage tank
- Gravity fed showers may require a pump if performance is unsatisfactory
Water pressure
As with a standard vented system, a combination storage system relies on gravity to supply hot water to the taps and shower(s). As the cold water cylinder is located directly above the hot water cylinder, this means that the generated 'head' of water pressure is relatively low.
To adequately feed all the fawcets, the combination system must be located above the level of the highest outlet, ie the water must flow down no matter how marginal the drop is.
Further information and useful links
- Find a Heating Engineer near you
- Find a Plumbing Merchants near you
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