Copper Hot Water Cylinders suitable for use on unpumped indirect systems. This makes them paricularly suitable to use with AGA, Rayburn and Wood burning stoves and alternative energies

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Hot water copper cylinders - Indirect type for use with an unpumped heat source

	Domestic hot water cylinders to be used with AGA, Rayburn, Wood Burning Stoves and similar unpumped heat sources

An 'indirect' cylinder is designed to be heated by a remote heat source. Typically these days this would be a gas boiler. There are however other devices that can produce the heat to do the job. It is important to choose the correct type of cylinder to accept the heat source - pumped (as it would be from a typical gas boiler) or unpumped (the sort of heat source one might expect to get from a wood burning stove or an AGA or Rayburn stove). The cylinder should also be vented.

Note: Unvented cylinders (the type that provide mains pressure hot water) should not be connected to a heat source that cannot be fully controlled - the risk of explosion exists. Mains pressure hot water can however be achieved in conjunction with a gravity heat source by using a 'Thermal Storage Device' such as a Torrent RE. For more info on how click here.

An AGA (for example) will produce an 'unpumped' circuit of hot water relying on the principle of hot water rising (and cooler water falling) to create 'gravity circulation' within the system. A cylinder that will happily accept an unpumped heat source is subtly different from a standard cylinder in so far as the heat exchanger has a larger diameter bore and the tappings (the in and out connections) are spaced slightly wider apart which improves the thermal dynamics and therefore the flow.

Do not connect a cylinder designed for a fully pumped system to an unpumped system. Please ensure you mention the heat source/s you intend to connect when ordering to ensure you get the right advice and the correct product.

INDIRECT Copper Cylinders for use with AGA, Rayburn, Wood Burners and unpumped indirect heat sources

Fitted with:

Additions and Options:

1" bosses (or Compression fittings*)
2 1/4" IMH boss (Immersion heater not included)
Larger/Bigger bore heat exchanger with wider differential on tappings
30mm Flexilag high performance Insulation.

[*If you have any preference make sure you mention it when you order]

Improve the 'standing' performance of your cylinder with a double thick layer of super-high performance insulation (60mm thick)( add £35)
15, 22 or 28mm compressions (free)

1/2" Drain off point (free)
Shower take off (free)
Secondary Return (free)
Incalloy Immersion heater (highly resistant to corrosion and recommended in hard water areas) (add £23.96 (each) - 3kW, 14" or 22")

Prices as of Feb 1st 2010

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An unpumped heat source is (more often than not) uncontrollable. This is to say, it cannot be turned up or down as required. The performance/efficiency of a gravity cylinder decreases as the cylinder gets hotter (where the incoming water from the heat source and the cylinder temperature differential get closer). For this reason it is wise to have a larger body of water into which the heat source may dump its energy. Failure to do so can result in the cylinder getting too hot. In such an event the excess heat may need to be 'leaked' away or the water in the system runs the risk of boiling/evaporating. In general, but only as a rule of thumb, it is considered that an 'entry level' cylinder in such a system should contain at least 140 litres of water. This figure may be different according to your hardware. Please refer to your system specifications before placing an order.
mm	Capacity (litres)	inches	Price inc vat

1200 x 400	134	48 x 16	£269.93
1500 x 400	170	60 x 16	£337.73
1050 x 450	140	42 x 18	£263.75
1200 x 450	162	48 x 18	£288.54
1500 x 450	218	60 x 18	£369.09
1800 x 450	265	72 x 18	£467.58
1200 x 500	190	48 x 20	£561.14
1270 x 500	215	50 x 20	£729.25
1500 x 500	245	60 x 20	£604.51
1800 x 500	273	72 x 20	£715.42
1200 x 600	300	48 x 24	£886.42
1500 x 600	380	60 x 24	£1035.10
1800 x 600	450	72 x 24	£1180.69

The following represents the full range of cylinders available with 'gravity' heat exchangers. As mentioned, please check with your hardware manufacturer for the recommended minimum size of cylinder for your installation. These may be suitable for systems where the heat source has a low output.
900 x 300	55	36 x 12	POA
1050 x 300	65	42 x 12	POA
1200 x 300	75	48 x 12	POA
1500 x 300	96	60 x 12	POA
1800 x 300	114	72 x 12	POA
900 x 350	74	36 x 14	POA
1050 x 350	90	42 x 14	POA
1200 x 350	103	48 x 14	POA
900 x 375	87	36 x 15	POA
1050 x 375	103	42 x 15	POA
1200 x 375	118	48 x 15	POA
750 x 400	80	30 x 16	POA
825 x 400	89	33 x 16	POA
900 x 400	96	36 x 16	POA
1050 x 400	114	42 x 16	POA
675 x 450	86	26 x 18	POA
750 x 450	95	30 x 18	POA
825 x 450	109	33 x 18	POA
900 x 450	117	36 x 18	POA

DIRECT

All cylinders are compliant with Part L Building Regulations. Fitted with FlexiLag insulation.