Heat Siphon Swimming Pool Heat Pumps - The Market Leading Pool Heater in the USA
New Heat Siphon Range (from April 2010), R410a gas Based !

Heat Siphon are the market leader of Swimming Pool heat pumps in the USA - the home of pool heat pumps, and HeatPumps4Pools supply and maintain these top quality products to the UK and Europe.
These are the new R410 based range of Heat Siphon heat pumps that were launched in April 2010.
All Heat Siphon swimming pool heat pumps supplied by HeatPumps4Pools have the following features:-
- One of the best performance and heat output of any heat pump
- Titanium heat exchanger to prevent corrosion by the pool chemicals
- UV Stabilized Flame retardant PVC casing to prevent corrosion
- Excellent heat output
- Quiet operation
- Simple and reliable operation
- R410a environmentally friendly and super efficient, European compliant refrigerant gas
- 50 Hz electrical operation for European power supply
- Scroll compressor units (piston compressor on 2.25HP models)
- Optional "soft-start" kit
The models can come with either an analogue or digital display.
| Digital Controls |
Analogue Controls
|
|
|
And can be supplied with either single phase or 3-phase electrical supply models
Excellent Features and Specification

Quality Copeland Compressors

Heat Siphon Models
| Model |
Output Power (kw) |
Digital / Analgogue controls |
Single / 3-Phase |
COP |
Running Current (A) |
Circuit Breaker Required |
Voltage |
| C2.25hp50 |
12.3kw |
Analogue |
Single |
5.0 |
|
30A |
208/230 |
| C3.25hp50 |
21.1kw |
Analogue |
Single |
6.25 |
|
40A |
208/230 |
| C5.0hp50 |
27.5kw |
Analogue |
Single |
5.72 |
|
40A |
208/230 |
| C2.25hpx |
12.3kw |
Analogue |
3-Phase |
6.25 |
|
10A |
380 |
| C3.25hpx |
27.5kw |
Analogue |
3-Phase |
6.25 |
|
20A |
380 |
| C5.0hpx |
32.8kw |
Analogue |
3-Phase |
5.72 |
|
20A |
380 |
| Z2.50hp50 |
12.3kw |
Digital |
Single |
5.01 |
|
30A |
208/230 |
| Z3.75hp50 |
21.7kw |
Digital |
Single |
6.24 |
|
40A |
208/230 |
| Z5.75hp50 |
28.8kw |
Digital |
Single |
6.2 |
|
50A |
208/230 |
| Z2.50hpx |
12.3kw |
Digital |
3-Phase |
5.01 |
|
10A |
380 |
| Z3.75hpx |
21.7kw |
Digital |
3-Phase |
6.24 |
|
20A |
380 |
| Z5.75hpx |
28.8kw |
Digital |
3-Phase |
6.2 |
|
20A |
380 |
(Note: COP measured at 26.6c, 26.6c water temp and 63% relative humidity)
What size heat pump do I require for my pool?
For an outdoor pool in the UK that is kept covered, use the following guide:-
1. Work out the surface area of your pool in square feet
2. For pools up to 350sq ft, you will need the 2.25hp model
3. for pools up to 700sq ft you will need the 3.25hp model
4. for pools up to 1000 sq ft, you will need the 5.0 model
Warranty
All Heat Siphon products come with the following warranty:-
- Lifetime warranty on the titanium heat exchanger
- 5-Years warranty on the compressor
- 2-years warranty on all other parts
- Inside the UK the warranty is parts and labour. Units installed outside the UK have a parts-only warranty.
At HeatPumps4Pools we always carry a full range of spare parts for all Heat Siphon products
Performance
All Heat Siphon heat pumps have excellent performance and provide one of the highest amount of heat per £ than any other unit that we sell
However please note that Heat Siphon heat pumps require an air temperature of +15c or above to operate. They do not have a defrost mechanisim and so are suitable for summer use only.

Soft-Start Kit
The soft start kit can be added to the order for any Heat Siphon heat pump.
The kit helps to prevent a power "spike" when the heat pump starts.
It smoothly brings the unit up the normal running current.
This can be useful if you have a sensitive fuse/breaker which may otherwise trip out without the soft start kit.
Dimensions
CRATED
| Model |
Weight
Lbs.(Kg) |
Length
Inches(Cm) |
Width
Inches(Cm) |
Height
Inches(Cm) |
| 2.25HP |
225 (102) |
34 (86) |
39 (99) |
36 (91) |
| 3.25HP |
275 (125) |
34 (86) |
39 (99) |
46 (117) |
| 5HP |
375 (170) |
34 (86) |
39 (99) |
46 (117) |
UNBOXED
| Model |
Weight
Lbs.(Kg) |
Length
Inches(Cm) |
Width
Inches(Cm) |
Height
Inches(Cm) |
| 2.25HP |
200 (90) |
32 (81.3) |
38 (96.5) |
31 (78.8) |
| 3.25HP |
250 (114) |
32 (81.3) |
38 (96.5) |
39 (99) |
| 5HP |
350 (158) |
32 (81.3) |
38 (96.5) |
39 (99) |
Installation
For tips on installation, please see our FAQs, Installation and Space Requirements pages
Product Literature
Please click the links below to download pdf brochures for Heat Siphon products
Note that the brochures above refer to American specification units. Please refer to the table under Pricing above for the ratings for European models. The difference is due to the fact that all European units use envionmentally friendly refrigerant gas which is more efficient and improves performance of the units.
For more information, also see the manufacturer's web site at:-
www.heatsiphon.com
Delivery
All Heat Siphon units are delivered direct from the manufacturer in the USA. The normal delivery time is approximately 2-3 weeks from order.
We can ship these units direct from the USA to any European country. This can often work out much cheaper.
Please contact us for further information on shipping costs to different European countries.
Payment
Note: We offer an additional 1% discount on these prices for payment by debit card or bank transfer. Just choose bank transfer or debit card as the payment type when you complete the checkout process.
Assistance?
If you need any assistance or advice as to which model would be best for your pool, please email us
for more information, also see our FAQs page
All items sold in accordance with our terms and conditions
for all enquiries, please contact us at enquiries@heatpumps4pools.com
This product was added to our catalog on Saturday 17 April, 2010.