Low pressure drop
The large pool-water-side flow path supports high circulation rates with low resistance.
SWIMMING POOL TUBULAR technology
Swimming Pool Heat Exchangers
Compact shell-and-coil tubular heat exchangers for transferring boiler, heat-pump or solar heat into swimming-pool water.
Working principle
How the technology transfers heat.
Pool water passes through the shell while the hot boiler, heat-pump or solar fluid travels through the internal corrugated helical tube. The corrugation increases turbulence and heat-transfer efficiency while the large shell-side path supports pool circulation with low pressure drop. For maximum performance, the two circuits are installed counter-currently so the hot and cold streams maintain a useful temperature difference along the exchanger.
- Construction
- Tubular shell with internal corrugated helical tube
- Flow arrangement
- Counter-current; pool water in shell, hot fluid in tube
- Published heat-transfer coefficient
- Up to 14,000 W/m²·K; duty-dependent
- Published maximum flow velocity
- Up to 5.5 m/s; verify pressure drop and erosion limits
- Pool-water-side performance
- High flow capacity with low pressure drop
- Mounting support
- Plastic or steel bracket options according to model and installation
- Published range
- ST16–ST1750 / SP55–SP6000
- Published capacity range
- 16–1,750 kW / 55–6,000 kBtu/h
Engineering explained
See what is happening inside the exchanger.
Product imagery is paired with technical context so buyers and engineers can understand construction, flow path and configuration—not just the exterior.
Pool-water heating circuit and flow path
Pool water passes through the shell circuit while the boiler, solar or heat-pump fluid travels through the internal tube circuit in counter-current flow.
Stainless-steel and titanium product family
Material and connection arrangement are selected for the heat source, pool chemistry and installation requirements.
Why this technology
Purpose-built for swimming pools and spas.
Helical corrugated-tube construction combines high heat-transfer efficiency, generous pool-water flow area and corrosion-conscious material options in a compact unit.
Compact size
The published design can require about one-tenth of the space of conventional reference systems.
Pool-water resistance
Stainless steel or titanium is selected around chlorine, bromine, salt content and cleaning chemistry.
Corrugated spiral tube
Tube corrugation increases turbulence and can deliver a published heat-transfer coefficient up to 14,000 W/m²·K.
01
Corrugated spiral-tube construction
The enlarged details show the corrugated internal spiral tube and tube sheet. Corrugation promotes turbulence, improving heat transfer while retaining a compact exchanger body.
02
Plastic and steel brackets
Plastic supports suit compact standard installations; steel brackets provide robust support for larger models and demanding mounting arrangements.
Models & technical data
Compare models and published specifications.
Compare circuit arrangement and overall dimensions at a glance, then open a product size for its product view, dimension drawing and technical summary.
Dimension units
| Model | Capacity (kW / kBtu/h) | Pool size (m³) | A (mm) | B (mm) | Details |
|---|---|---|---|---|---|
| ST16 / SP55 | 16 / 55 | 15 | 339 | 63.5 | Open details |
| ST25 / SP85 | 25 / 85 | 25 | 494 | 63.5 | Open details |
| ST45 / SP105 | 45 / 155 | 45 | 404 | 80 | Open details |
| ST60 / SP205 | 60 / 210 | 65 | 511 | 80 | Open details |
| ST88 / SP300 | 88 / 300 | 90 | 701 | 80 | Open details |
| ST105 / SP360 | 105 / 360 | 110 | 890 | 80 | Open details |
| ST175 / SP600 | 175 / 600 | 180 | 862 | 110 | Open details |
| ST352 / SP1200 | 352 / 1,200 | 360 | 895 | 127 | Open details |
| ST700 / SP2400 | 700 / 2,400 | 800 | 964 | 168 | Open details |
| ST880 / SP3000 | 880 / 3,000 | 1,000 | 1,130 | 168 | Open details |
| ST1050 / SP3600 | 1,050 / 3,600 | 1,200 | 1,330 | 168 | Open details |
| ST1350 / SP4500 | 1,350 / 4,500 | 1,500 | 1,030 | 219 | Open details |
| ST1450 / SP5000 | 1,450 / 5,000 | 1,660 | 1,130 | 219 | Open details |
| ST1750 / SP6000 | 1,750 / 6,000 | 1,800 | 1,330 | 219 | Open details |
Published HEXNOVAS swimming-pool catalogue dimensions and nominal performance data. Capacity, flow, pressure drop, pool heating rate and heat-transfer area are nominal specification values based on a 60°C (140°F) inlet temperature difference. Final exchanger selection must be checked against pool volume, warm-up time, heat-source temperatures, water chemistry, flow, pressure drop and local installation requirements.
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Model details
ST16 / SP55
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 16 / 55
- Pool size (m³)
- 15
- A (mm)
- 339
- B (mm)
- 63.5
- C (mm)
- 253
- Pool port D
- 1 in
- Hot port E
- 3/4 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 4,700 / 32.0
- Hot-water flow (L/min / USGPM)
- 28 / 7.49
- Hot-side pressure drop (kPa / psi)
- 5.83 / 0.85
- Pool-water flow (L/min / USGPM)
- 185 / 48.84
- Pool-side pressure drop (kPa / psi)
- 7.08 / 1.03
- Heat-transfer area (m² / ft²)
- 0.15 / 1.636
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST25 / SP85
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 25 / 85
- Pool size (m³)
- 25
- A (mm)
- 494
- B (mm)
- 63.5
- C (mm)
- 408
- Pool port D
- 1 in
- Hot port E
- 3/4 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 7,300 / 49.7
- Hot-water flow (L/min / USGPM)
- 31 / 8.27
- Hot-side pressure drop (kPa / psi)
- 7.07 / 1.02
- Pool-water flow (L/min / USGPM)
- 213 / 56.22
- Pool-side pressure drop (kPa / psi)
- 8.81 / 1.28
- Heat-transfer area (m² / ft²)
- 0.25 / 2.702
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST45 / SP105
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 45 / 155
- Pool size (m³)
- 45
- A (mm)
- 404
- B (mm)
- 80
- C (mm)
- 310
- Pool port D
- 1.5 in
- Hot port E
- 1 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 13,300 / 90.6
- Hot-water flow (L/min / USGPM)
- 32 / 8.46
- Hot-side pressure drop (kPa / psi)
- 7.58 / 1.10
- Pool-water flow (L/min / USGPM)
- 237 / 62.66
- Pool-side pressure drop (kPa / psi)
- 10.92 / 1.58
- Heat-transfer area (m² / ft²)
- 0.33 / 3.552
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST60 / SP205
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 60 / 210
- Pool size (m³)
- 65
- A (mm)
- 511
- B (mm)
- 80
- C (mm)
- 417
- Pool port D
- 1.5 in
- Hot port E
- 1.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 18,000 / 122.6
- Hot-water flow (L/min / USGPM)
- 35 / 9.13
- Hot-side pressure drop (kPa / psi)
- 2.59 / 0.38
- Pool-water flow (L/min / USGPM)
- 242 / 63.94
- Pool-side pressure drop (kPa / psi)
- 7.28 / 1.06
- Heat-transfer area (m² / ft²)
- 0.44 / 4.769
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST88 / SP300
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 88 / 300
- Pool size (m³)
- 90
- A (mm)
- 701
- B (mm)
- 80
- C (mm)
- 611
- Pool port D
- 2 in
- Hot port E
- 1.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 25,800 / 175.8
- Hot-water flow (L/min / USGPM)
- 42 / 11.16
- Hot-side pressure drop (kPa / psi)
- 3.89 / 0.56
- Pool-water flow (L/min / USGPM)
- 325 / 86.11
- Pool-side pressure drop (kPa / psi)
- 11.26 / 1.63
- Heat-transfer area (m² / ft²)
- 0.64 / 6.889
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST105 / SP360
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 105 / 360
- Pool size (m³)
- 110
- A (mm)
- 890
- B (mm)
- 80
- C (mm)
- 800
- Pool port D
- 2 in
- Hot port E
- 1.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 31,500 / 214.6
- Hot-water flow (L/min / USGPM)
- 48 / 12.63
- Hot-side pressure drop (kPa / psi)
- 5.83 / 0.85
- Pool-water flow (L/min / USGPM)
- 358 / 94.70
- Pool-side pressure drop (kPa / psi)
- 16.55 / 2.40
- Heat-transfer area (m² / ft²)
- 0.85 / 9.128
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST175 / SP600
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 175 / 600
- Pool size (m³)
- 180
- A (mm)
- 862
- B (mm)
- 110
- C (mm)
- 750
- Pool port D
- 2.5 in
- Hot port E
- 2 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 52,500 / 357.7
- Hot-water flow (L/min / USGPM)
- 66 / 17.44
- Hot-side pressure drop (kPa / psi)
- 8.43 / 1.22
- Pool-water flow (L/min / USGPM)
- 432 / 114.16
- Pool-side pressure drop (kPa / psi)
- 21.19 / 3.07
- Heat-transfer area (m² / ft²)
- 1.55 / 16.695
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST352 / SP1200
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 352 / 1,200
- Pool size (m³)
- 360
- A (mm)
- 895
- B (mm)
- 127
- C (mm)
- 765
- Pool port D
- 2.5 in
- Hot port E
- 2 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 105,600 / 719.0
- Hot-water flow (L/min / USGPM)
- 114 / 30.19
- Hot-side pressure drop (kPa / psi)
- 15.23 / 2.21
- Pool-water flow (L/min / USGPM)
- 847 / 224.06
- Pool-side pressure drop (kPa / psi)
- 27.94 / 4.05
- Heat-transfer area (m² / ft²)
- 2.01 / 21.582
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST700 / SP2400
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 700 / 2,400
- Pool size (m³)
- 800
- A (mm)
- 964
- B (mm)
- 168
- C (mm)
- 834
- Pool port D
- 4 in
- Hot port E
- 2.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 211,200 / 1,438.0
- Hot-water flow (L/min / USGPM)
- 267 / 70.65
- Hot-side pressure drop (kPa / psi)
- 19.81 / 2.87
- Pool-water flow (L/min / USGPM)
- 1,694 / 448.13
- Pool-side pressure drop (kPa / psi)
- 34.48 / 5.00
- Heat-transfer area (m² / ft²)
- 4.27 / 45.963
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST880 / SP3000
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 880 / 3,000
- Pool size (m³)
- 1,000
- A (mm)
- 1,130
- B (mm)
- 168
- C (mm)
- 1,000
- Pool port D
- 4 in
- Hot port E
- 2.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 264,000 / 1,797.5
- Hot-water flow (L/min / USGPM)
- 342 / 90.58
- Hot-side pressure drop (kPa / psi)
- 20.69 / 3.00
- Pool-water flow (L/min / USGPM)
- 2,117 / 560.16
- Pool-side pressure drop (kPa / psi)
- 36.55 / 5.30
- Heat-transfer area (m² / ft²)
- 5.07 / 54.575
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST1050 / SP3600
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 1,050 / 3,600
- Pool size (m³)
- 1,200
- A (mm)
- 1,330
- B (mm)
- 168
- C (mm)
- 1,200
- Pool port D
- 4 in
- Hot port E
- 2.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 316,800 / 2,157.0
- Hot-water flow (L/min / USGPM)
- 371 / 98.13
- Hot-side pressure drop (kPa / psi)
- 22.07 / 3.20
- Pool-water flow (L/min / USGPM)
- 2,541 / 672.19
- Pool-side pressure drop (kPa / psi)
- 40.69 / 5.90
- Heat-transfer area (m² / ft²)
- 6.42 / 69.107
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST1350 / SP4500
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 1,350 / 4,500
- Pool size (m³)
- 1,500
- A (mm)
- 1,030
- B (mm)
- 219
- C (mm)
- 900
- Pool port D
- 4 in
- Hot port E
- 2.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 396,000 / 2,700.0
- Hot-water flow (L/min / USGPM)
- 514 / 135.87
- Hot-side pressure drop (kPa / psi)
- 21.38 / 3.10
- Pool-water flow (L/min / USGPM)
- 3,176 / 840.24
- Pool-side pressure drop (kPa / psi)
- 39.31 / 5.70
- Heat-transfer area (m² / ft²)
- 8.42 / 90.635
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST1450 / SP5000
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 1,450 / 5,000
- Pool size (m³)
- 1,660
- A (mm)
- 1,130
- B (mm)
- 219
- C (mm)
- 1,000
- Pool port D
- 4 in
- Hot port E
- 2.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 439,000 / 3,000.0
- Hot-water flow (L/min / USGPM)
- 570 / 150.00
- Hot-side pressure drop (kPa / psi)
- 24.83 / 3.60
- Pool-water flow (L/min / USGPM)
- 3,530 / 934.00
- Pool-side pressure drop (kPa / psi)
- 40.69 / 5.90
- Heat-transfer area (m² / ft²)
- 8.87 / 95.479
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionModel details
ST1750 / SP6000
HEXNOVAS Swimming Pool Heat Exchangers
- Capacity (kW / kBtu/h)
- 1,750 / 6,000
- Pool size (m³)
- 1,800
- A (mm)
- 1,330
- B (mm)
- 219
- C (mm)
- 1,200
- Pool port D
- 4 in
- Hot port E
- 2.5 in
- Nominal pool capacity (gal @ 1°F/hr / m³ @ 1°C/hr)
- 526,800 / 3,600.0
- Hot-water flow (L/min / USGPM)
- 684 / 180.00
- Hot-side pressure drop (kPa / psi)
- 28.55 / 4.32
- Pool-water flow (L/min / USGPM)
- 4,236 / 1,120.80
- Pool-side pressure drop (kPa / psi)
- 42.76 / 6.20
- Heat-transfer area (m² / ft²)
- 10.64 / 114.575
- Performance basis
- Nominal ratings at a 60°C (140°F) inlet temperature difference
- Construction
- Corrugated helical tube inside a tubular shell
- Published tube-bundle materials
- SS316L, SS304 or titanium
- Port arrangements
- Same-side or opposite-side layouts
- Mounting
- Plastic or steel bracket options
Dimensions are for reference only. Final dimensions are subject to the approved order drawing. HEXNOVAS reserves the right of final interpretation.
Request model selectionProduct configuration
Structure and material options.
Available configurations
- ST16 to ST1750 global range
- SP55 to SP6000 American designation range
- Same-side and opposite-side connection layouts
- Plastic mounting brackets for compact standard installations
- Steel mounting brackets for larger units and robust mechanical support
Material options
- Stainless-steel construction for compatible treated pool water
- Titanium versions for demanding chloride or salt-water service
- Material review includes chlorine, bromine, salt content, operating temperature and cleaning chemicals
- Material selection must be confirmed against actual water chemistry
Typical applications
Where this exchanger fits.
Residential and commercial swimming pools
Spa and hot-tub water heating
Boiler-to-pool and heat-pump-to-pool systems
Chlorinated and salt-water pools with compatible material selection
Selection information
What our engineers need from you.
Provide pool volume, desired warm-up time, chlorine or bromine concentration, salt content, heat-source capacity and temperatures, water flows, allowable pressure drop, connection standard, preferred port arrangement and installation-bracket requirements.
Frequently asked questions
Key questions before product selection.
How does Swimming Pool Heat Exchangers work?
Pool water passes through the shell while the hot boiler, heat-pump or solar fluid travels through the internal corrugated helical tube. The corrugation increases turbulence and heat-transfer efficiency while the large shell-side path supports pool circulation with low pressure drop. For maximum performance, the two circuits are installed counter-currently so the hot and cold streams maintain a useful temperature difference along the exchanger.
What information is required to select the right product?
Provide pool volume, desired warm-up time, chlorine or bromine concentration, salt content, heat-source capacity and temperatures, water flows, allowable pressure drop, connection standard, preferred port arrangement and installation-bracket requirements.
Which materials and configurations are available?
Stainless-steel construction for compatible treated pool water; Titanium versions for demanding chloride or salt-water service; Material review includes chlorine, bromine, salt content, operating temperature and cleaning chemicals; Material selection must be confirmed against actual water chemistry
How is the final product size confirmed?
The final size is confirmed by thermal calculation using flow rates, inlet and outlet temperatures, allowable pressure drop, design pressure and fluid properties.
Product documentation
Catalogue and technical downloads.
Use the published catalogue for product-range reference. Final dimensions, ratings and materials are confirmed for the selected model and operating duty.
Discuss this product