QUALITY PRODUCTS

AT COMPETITIVE PRICES

FRIENDLY ADVICE

From our technical experts

Thermalec Swimming Pool Heaters 12THR 3KW-12KW

from: £837.50

  • FREE DELIVERY!
  • Solid and robust
  • Titanium elements
  • Spiral flow design
  • 2 year guarantee 
Clear
SKU: 2728 Categories: ,

Description

Thermalec Swimming Pool Heaters (Model 12THR)  3KW – 12KW

Standard Model Heaters 3kW – 12kW  230/400V

Complete with all necessary controls to operate the heater, including contactors, pool temperature controller, manual reset excess temperature stat, and diagnostic lights.  Due to the inherent safety of the patented Thermalec Spiral Flow design these heaters do not have to rely upon a flow switch or pressure switch – nor should one be fitted by the installer.

The construction of the heater is solid and robust, to ensure years of safe and reliable service.
The contact materials are highly resistant to corrosion from pool chemicals. Thermalec® pool and spa heaters can safely be used with sea water pools as well as in demanding applications such as Hydro- and Thalasso- therapy.
The watts density of the heating elements is very low (9.54 W/cm²), ensuring minimal scale build-up and long element life.
The heating elements are always submerged in water. Any air bubbles entering the heater pass through it above the water and across the unheated parts of the elements, preventing any damage to the latter.
The patented weir and baffle system inside the heater causes the water to flow through it in a spiral. This increases uniformity of the water temperature inside the heater and prevents direct impingement of cold water onto the elements.
The spiral flow regime of the water inside the heater discourages scale formation, extending element life.
Thermalec® heaters are flexible: The water flow direction is normally left to right. If required, this can be easily changed on installation by means of a simple modification. Most models may be easily changed by a qualified electrician from single to three phase operation and vice-versa.
The thermostats used in Thermalec® pool and spa heaters have a low operating differential. This is essential to maintain the swimming pool at a virtually constant temperature.
Heaters with higher operating differentials are likely to allow the pool to cool to an uncomfortably low temperature before switching the heating on.
Top quality contactors have been used and their ratings generously selected to give a long service life and minimum risk of operational problems, particularly in pool plant room
conditions.
As a safety precaution, the heaters are provided with an interlock relay, which has to be connected to the filter pump control circuit. The heater will not operate unless the interlock is wired and the filter pump is energised.
Status indicator lamps on front of panel to facilitate troubleshooting and diagnostics.
Thermalec® pool and spa heaters comply with all current and relevant EU regulations and directives.
Thermalec® pool and spa heaters have a two-year guarantee.
Heater Sizing Chart for a 7 hour heating period  
per 24 hours with a floating solar cover.  
(If a floating solar blanket is not used increase the heater size by 50%). Running Costs > 
All heaters with Titanium elements 
HEATER SIZE                        METRIC 
24°C 
24°C
27°C
27°C
30°C
30°C
3Kw 
6
8
5
7
4
5
6kW 
12
16
10
13
8
11
7.5kW 
15
21
12
16
10
13
9kW 
18
25
14
20
12
16
12kW 
24
33
19
26
15
21
The Thermalec sizing chart is for outdoor swimming pools in the South of England, running from the beginning of May until the end of September. For swimming pools in the North, multiply the heater size by 1.3 – 1.5 depending on the exposure of the pool.
The figures shown for capacity of the pool – in gallons or M³ – are based upon an average depth of 4’6″ (1.36m) and are provided as a guide when an exact surface area is not known.
Indoor pools: providing the indoor air temperature is maintained at least 1°C above the pool temperature by an alternative form of heating 24 hours per day, the heater size may be reduced by multiplying by 0.7, but since running costs are related to the size of the pool and the temperature required, not the size of the heater, we advise keeping to the table where possible.
In countries where off-peak electricity is not available, heaters sized at 1kW per 1000 gallons (4500 litres) with the heater operating 24 hours per day, will normally be adequate and will give an 8°F (4.4°C) rise in 24 hours assuming no losses

WAKE UP WITH A WARM SMILE AND BENEFIT FROM MINIMAL COSTS – AND LOW UP KEEP! 

Every Thermalec owner wakes up to find that the pool water is just as inviting as it was yesterday and the day before. That is the great advantage of having a positive and powerful heating system. That smile also comes from knowing that keeping the pool at an even temperature all summer long will not have cost as much as other systems because both the heating and the filtration will have been carried out using Economy 7 only. Satisfaction too in knowing how little the heater cost to buy and maintain. 
THE DETAILED GUIDE TO SWIMMING POOL RUNNING COSTS AND OTHER FACTORS IN THE CHOICE OF A HEATING SYSTEM 
Five whole months of swimming in beautiful clear clean water at temperatures well above those of the Mediterranean with a heating cost that is less than the cost of one package holiday for a week.
With a 12’ by 24’ pool the total running cost of both heater and filter pump can be less than £430 for 22 weeks swimming at 80ºF as shown in the example given below.
Using a Thermalec heater and taking advantage of low cost electricity at night for both heating and filtration gives you up to 22 weeks of summer swimming, without ever leaving your own garden.
Taking a pool with a solar cover maintained at 80ºF for the whole 22 week season from early May to the end of September, our experience over 40 years is that you can expect on average a heat loss equal to 28 Units of electricity per sq.ft. or 300 Units per M² of pool surface area.
This will be the heat loss from a pool of this size held at this temperature regardless of the type of heating system used. This then gives you a yardstick by which we may compare running costs.
To find out the seasonal consumption, simply multiply the sq.ft. of surface area by 28 (or M² by 300).
Most people we talk to do not realise that a pool only alters in temperature 2 or 3 degrees in 24 hours, but being a large mass of water it is thermally very stable. Consequently, heating a pool by night is the perfect way of using Economy 7 which is now much less than half-price electricity – much nearer 1/3rd of the daytime rate.
The Thermalec utilises this power in the most economical way possible. Unlike a storage heater, which heats its core up to a very high temperature, much of which heat must be given off during the following day – The Thermalec simply heats its storage medium, the water you swim in, to the exact temperature you want to swim in and not one degree more.
Heater Operation diagram
1. Heating Elements (always fully submerged) ➚   2. Air passes safely above the elements) ➚
3. Curved base (swept clean of scale and sediment) ➚
For example a 12 x 24 ft pool has a surface area of 288 sq.ft, multiply this by 28, you have 8064 Units. If the price you pay for E7 electricity in your area is 4.92 pence per unit, then the total cost per season is £0.0492p x 8064 Units =39675 pence or in other words, roughly £397.00 per year.
One of the many benefits of using a Thermalec on Economy 7 is that a dramatic reduction is made on the cost of filtration, as, in private pools, it is normally arranged for the filter pump to run during the E7 period. A ¾HP pump uses 0.55 units per hour or 4 units in 7 hours, which at £0.0492p per unit, costs £0.20p per night or £31.50 per season. The heating and filtration costs together come to just £428.50 using the Thermalec system.
With other systems the filtration costs add considerably to the total running costs. If for instance you compare this with a Heat Pump of the same daily output as a Thermalec, it can only give this output if the filter pump runs 24 hours per day and that will be on day-rate electricity at approx. £0.179p a unit.
The heating cost is still based on replacing the 8064 units heat loss from the pool. Whilst the heat pump takes 3 parts from the air and one part from the mains, the 2000 units of electricity it does consume are at the day-time rate of £0.17.9p – making a heating cost of only £358.00
But the cost of running the same filter pump as above for 24 hours, just to transfer the heat from the Heat Pump to the pool is then 0.55 units x 24 hours x 7 days x 22 weeks x £0.179p per unit which comes to £285 for the season on filtration alone – and with the £280 heating cost totals £720.
THERMALEC GUARANTEE 
Two years against faulty workmanship or materials. We will repair or replace during this period any goods returned to our factory for inspection. This guarantee does not cover misuse or neglect of the heater.
Control Panels – Guaranteed for 12 months against faulty workmanship.
Electric Pool Heaters – Are guaranteed for two years against faulty workmanship.
Guarantee emblem
ALL GUARANTEES ARE FOR PARTS ONLY – TERMS & CONDITIONS APPLY

Additional information

Size

12THR/2.5KW Pool Volume 7m3, 12THR/3 Pool Volume 8m3, 12THR/4 Pool Volume 11m3, 12THR/5 Pool Volume 14m3, 12THR/6 Pool Volume 16m3, 12THR/7.5 Pool Volume 21m3, 12THR/9 Pool Volume 25m3, 12THR/12 Pool Volume 33m3

How to treat green water

Find out all you need to know about algae and green water, how to treat it and how to cure it.

Returns Policy

Your rights to return goods are protected under the EU Distance Selling Directive.

You are entitled to cancel your order and return the goods within 7 working days for a full refund not including the cost of delivery. Do this by contacting us by email or telephone and quoting the order number supplied to you. Your refund will be paid within 30 days. You are responsible for the cost and risk of loss or damage when returning the goods, so you should take out enough postal insurance to cover their value. This cancellation policy does not affect your rights when we are at fault - for example, if goods are faulty or incorrectly-described.

Exclusions: Bespoke items (made to measure items) are not included and cannot be returned. If a bespoke item is faulty then the product warranty /guarantee will take effect.

Any goods returned should be in saleable condition.

These terms apply to your order. We may change our terms and conditions at any time, so please do not assume that the same terms will apply in the future.

None of these terms affect your legal rights and these are not diminished in any way. If any term is held to be invalid under any applicable statute or rule of law, that term is automatically omitted from the terms to minimum extent necessary to comply with the law and without affecting the validity or enforceability of the remainder.