Thermal Store for Wood & multifuel stove & cooker boilers/Hybrid Systems
KISS principle 'KEEP IT SIMPLE STUPID'
The thermal store concept has been around for many years now, and I have personally used one in my home for 15 years. The beauty of the system is in it's simplicity, 2 or more boilers/heat sources connected together with out need for electronics, valves or human interference.
Some manufacturers advocate the use of cheaper plate heat exchangers and stainless steel. There are a number of problems going down this design road;-
- The passages ways on a plate heat exchanger are very small, in a hard water area a water softener must be used, plus a filter system, other wise this type regularly clog up and need replacing. (They are used in all gas combi boilers, hence the low cost and short life)
- No electricity - No hot water as they require a pump and flow switch.
- Pumps and flow switches ware out and go wrong, more maintenance, servicing and of course cost in the long run.
With the above problems and very little cost saving by the time you have bought the pumps and fittings, I cannot see any advantage in using a plate heat exchanger system. Our thermal store have a 12 meter long 15mm diameter finned copper coil. The out put depends on the house flow rate and the temperature inside the store but is easily 25-30 litre/min. More than enough for 2 showers and basins. If you need more hot water, 3 bathrooms etc etc, you are better of with 2 cylinders, and charge the second hot water cylinder indirectly from the thermal store. Either a pump fed, unvented or using conventional cold water tanks in the loft. If in doubt email me, putting more plate exchangers or large thermal stores will not help as it will be constrained by the flow of water into the house.
Thermal store Prices March 2012.
Prices these exc. VAT, which can be 0%, 5% or 20% depending on installation.
| Size | 1500 X 450 | 1500 X 500 | 1800 X 450 | 1800 X 500 | 1,950 X 450 | 1,950 X 500 |
|---|---|---|---|---|---|---|
| Volume aprox. Litres | 210 Litres | 250 Litres | 250 Litres | 310 Litres | 270 Litres | 355 Litres |
| Basic with hot water coil | £ 856.00 | £1,118.00 | £ 900.00 | £1,175.00 | £ 994.00 | £1,269.00 |
| Extras | ||||||
| F & E + 270mm on height | £ 68.75 | £ 68.75 | £ 83.75 | £ 83.75 | £ 83.75 | £ 83.75 |
| Solar coil | £ 75.00 | £ 75.00 | £ 75.00 | £ 75.00 | £ 75.00 | £ 75.00 |
| 70mm insulation | £ 37.50 | £ 37.50 | £ 37.50 | £ 37.50 | £ 37.50 | £ 37.50 |
| 100mm insulation | £ 100.00 | £ 100.00 | £ 100.00 | £ 100.00 | £ 100.00 | £ 100.00 |
| Emersion heater boss (each) | £ 12.50 | £ 12.50 | £ 12.50 | £ 12.50 | £ 12.50 | £ 12.50 |
| Emersion heaters (each) | £ 31.25 | £ 31.25 | £ 31.25 | £ 31.25 | £ 31.25 | £ 31.25 |
| T/stat & pocket | £ 31.25 | £ 31.25 | £ 31.25 | £ 31.25 | £ 31.25 | £ 31.25 |
| Carriage | £ 75.00 | £ 75.00 | £ 75.00 | £ 75.00 | £ 75.00 | £ 75.00 |
| Total (add up your options) |
Basic thermal store is complete with; 15 meter finned water coil, fitted with thermostatic valve, 40mm sprayed foam insulation, 1 off 28mm boiler flow and returns, 1 off 22mm boiler flow and returns, 2 sets of 22mm heating flow and returns. Fill and drain plus 22mm vent. Its include delivery to main land UK.
F & E is complete with high temp ball valve for solid fuel heating.
Solar coil is complete with thermostat pockets top and bottom for sensors. It is advisable to have the extra insulation with solar panels if there is the room.
You can have 1 or more emersion heaters to make use of cheaper night electricity.
You can site them in loft but for thermal efficiency and a warm drying cupboard an 'airing cupboard' on the first or second floor is best.
If you want to use a wood or coal burning boiler, the base of the thermal store has to be at least 250mm above the top of the boiler.
All prices plus VAT @, 20% if bought separately, but only 5% if bought with solar system or wood boiler over 7kW, plus installation.
The main T/store I sell for a 3-4 bed house is: 18000mm high, 500 diameter, solar, with 2 thermostat pockets, 28mm solid fuel boiler flow and return,22mm fossil fuel boiler flow and return, 2 of 22mm central heating flow and returns, single emersion with 70mm insulation. This costs £ 1,468.75 + VAT @ 5%, we then use the existing small F & E tank in the loft.
Kitchens:
We provide a complete service, design, install and minor works (take down walls, small extensions etc.)
We specialise in framed Oak and painted kitchens and can supply framed furniture type kitchen at sensible prices
To see ideas click here.
Very well priced standard doors
Phone 01227 780830 to order or email;- info@cosi.co.uk
For orders telephone 01227 787 587 or Fax 01227 787 588.
58/60 Wincheap, Canterbury, Kent. CT1 3RS.