🔥 Bowman EC120-5113-3C-SP Cupro-Nickel Heat Exchanger | Up to 70kW | Solar Panel Series

☀️ Harness Renewable Energy for Your Pool – British-Engineered Solar-Optimised Heat Transfer Technology

📋 Product Overview

The Bowman EC120-5113-3C-SP is a premium shell and tube swimming pool heat exchanger, specifically optimised for solar panel and renewable energy heating systems. Manufactured by EJ Bowman, with over 100 years of heat transfer technology expertise, this cupro-nickel model delivers efficient heat transfer from solar collectors, heat pumps, or traditional boiler systems to your pool water.

Featuring robust cupro-nickel tube construction, this heat exchanger provides excellent corrosion resistance for chlorinated and mineral-rich freshwater pools. The innovative ‘Universal Fit’ composite end covers accommodate both imperial (1.5″/48mm OD) and metric (50mm OD) pool pipework, simplifying installation across different plumbing configurations.

Designed for pools up to 120m³ (26,000 gallons), the EC120-5113-3C-SP combines compact dimensions with impressive heat transfer capability – delivering up to 70kW when connected to boiler systems or 20kW with renewable energy sources. Whether you’re building an eco-friendly solar heating system or integrating with an existing heat pump, this heat exchanger delivers proven Bowman performance.

⭐ Key Features

✅ Solar-Optimised Design – Specifically engineered for renewable energy integration including solar thermal collectors and heat pumps

✅ Cupro-Nickel Tube Construction – Excellent corrosion resistance for chlorinated pools and mineral-rich freshwater applications

✅ Up to 70kW Heat Transfer – Powerful performance with boiler heating; 20kW typical with renewable energy systems

✅ 120m³ Pool Capacity – Suitable for pools up to 26,000 gallons

✅ Universal Fit End Covers – Compatible with 1.5″ (48mm OD) imperial or 50mm OD metric pool pipework

✅ Dual Mounting Options – Install vertically or horizontally to suit your plant room configuration

✅ Removable Tube Stack – Easy access for routine maintenance and inspection

✅ Integrated Thermostat Pocket – Ø7 x 40mm pocket on inlet end for temperature monitoring

✅ Compact & Lightweight – Just 542mm overall length and 5.5kg for easy handling and installation

✅ 6 Bar Maximum Pressure – Robust construction rated for demanding commercial and residential applications

🔧 Technical Specifications

Specification	Details
Model Number	EC120-5113-3C-SP
Tube Material	Cupro-Nickel
Shell Material	Composite End Covers
Typical Pool Capacity	120m³ (26,000 gallons)
Typical Heat Transfer (Boiler)	70kW
Typical Heat Transfer (Renewable)	20kW
Maximum Pool Water Flow	13.5 m³/h (225 l/min)
Maximum Hot Water Temperature	110°C (230°F)
Max Operating Pressure (Pool Water)	6 bar (87 psi)
Max Operating Pressure (Hot Water)	6 bar (87 psi)
Primary Connections (Hot Water)	3/4″ BSP
Secondary Connections (Pool Water)	1.5″ (48mm OD) or 50mm OD metric
Overall Length	542mm
End Cover Diameter	86mm
Mounting Hole Diameter	Ø7mm
Thermostat Pocket	Ø7 x 40mm (Inlet End)
Weight (Dry)	5.5 kg

📊 Heat Transfer Performance

The EC120-5113-3C-SP delivers variable heat output depending on your hot water source temperature and flow rate. The following performance data is taken directly from manufacturer testing at pool water flow of 250 l/min at 28°C:

🌡️ Heat Output at Different Hot Water Temperatures

Hot Water Flow Rate	82°C Source	70°C Source	60°C Source	45°C Source
10 l/min	26 kW	20 kW	15 kW	8 kW
20 l/min	41 kW	31 kW	24 kW	12 kW
30 l/min	51 kW	39 kW	29 kW	15 kW
40 l/min	58 kW	45 kW	34 kW	17 kW
50 l/min	64 kW	49 kW	37 kW	19 kW
60 l/min	69 kW	53 kW	40 kW	21 kW
70 l/min	73 kW	56 kW	42 kW	22 kW

Source: EJ Bowman Product Profile EC120-5113-3, February 2017

⚡ Performance Summary

• Maximum Heat Output: 73kW (at 82°C source water, 70 l/min flow)
• Typical Boiler Application: 70kW
• Typical Renewable Energy Application: 20kW
• Optimal Pool Water Flow: 250 l/min at 28°C for rated performance

💧 Pressure Drop Data

Shell Side (Heating Water):

Flow Rate	Pressure Drop
20 l/min	2.4 kPa
30 l/min	5.2 kPa
40 l/min	9.3 kPa
50 l/min	14.4 kPa
60 l/min	20.7 kPa
70 l/min	28.1 kPa

Tube Side (Pool Water):

Flow Rate	Pressure Drop
50 l/min	0.6 kPa
100 l/min	2.0 kPa
150 l/min	4.2 kPa
200 l/min	7.1 kPa
250 l/min	10.7 kPa

Source: EJ Bowman Product Profile EC120-5113-3

⏱️ Heat-Up Times & Temperature Maintenance

⚠️ Important Notice: Heat-up times vary significantly based on multiple factors and are not specified in manufacturer documentation for this model. Actual heating performance depends on:

• Heat source output (boiler/heat pump kW rating)
• Starting water temperature
• Target water temperature
• Pool cover usage and insulation
• Ambient/outdoor temperature
• Heat exchanger sizing match to heat source
• Pool surface area and heat losses

📐 Sizing Guidance

The EC120-5113-3C-SP is rated for pools up to 120m³ (26,000 gallons) based on manufacturer specifications. This rating assumes adequate heat source capacity and proper system design.

Heat Source Matching:

• For boiler systems: Heat exchanger can transfer up to 70kW
• For renewable energy (solar/heat pump): Typical transfer of 20kW

🛡️ Material & Compatibility Guide

Cupro-Nickel Construction

The EC120-5113-3C-SP features cupro-nickel tube construction, offering an excellent balance of corrosion resistance, heat transfer efficiency, and value.

✅ Chlorinated Freshwater Pools – Excellent resistance to standard pool chemicals

✅ Mineral-Rich Water – Handles hard water and mineral content effectively

✅ Heat Pump Integration – Ideal for renewable energy applications

✅ Solar Thermal Systems – Optimised for solar collector installations

✅ Boiler Systems – Compatible with traditional gas/oil boiler heating

⚠️ Important: For salt water pools or pools with salt water chlorinators, consider the Titanium model (EC120-5113-3T) for maximum corrosion resistance and longevity.

Material Comparison (EC120 Series)

Model	Tube Material	Pool Capacity	Salt Water Compatible	Warranty
EC120-5113-3C	Cupro-Nickel	120m³ (26,000 gal)	❌ Freshwater only	Standard
EC120-5113-3S	Stainless Steel	130m³ (28,500 gal)	❌ Not recommended	Standard
EC120-5113-3T	Titanium	130m³ (28,500 gal)	✅ Full compatibility	10 Year (materials)

Note: Stainless steel models are not suitable for use on pools fitted with salt water chlorinators or salt water pools.

🎯 Applications & Use Cases

The Bowman EC120-5113-3C-SP is ideal for:

☀️ Solar Heated Pools – Specifically optimised for solar thermal collector integration, transferring renewable heat efficiently to your pool water

🔥 Heat Pump Systems – Perfect partner for air source or ground source heat pumps in eco-friendly pool heating setups

🏊‍♂️ Residential Swimming Pools – Suitable for domestic pools up to 120m³ (26,000 gallons)

🏢 Small Commercial Installations – Holiday lets, boutique hotels, and small leisure facilities

🌱 Hybrid Heating Systems – Combine solar with backup boiler heating for year-round pool comfort

⚡ Energy-Efficient Facilities – Ideal for installations focused on reducing carbon footprint and running costs

💧 Freshwater Chlorinated Pools – Cupro-nickel construction handles standard pool chemicals effectively

🔨 Installation Considerations

Mounting Options

The EC120-5113-3C-SP can be installed in either orientation:

✅ Horizontal Mounting – Standard installation with supplied mounting brackets

✅ Vertical Mounting – Space-saving option for compact plant rooms

Connection Requirements

• Hot Water (Primary): 3/4″ BSP threaded connections
• Pool Water (Secondary): Universal Fit end covers accept 1.5″ (48mm OD) or 50mm OD metric pipework
• Solvent Weld: End covers designed for solvent weld connection to pool pipework

Installation Guidelines

✅ Install isolation valves on both circuits for easy maintenance access

✅ Ensure correct flow direction – hot water flows through shell, pool water through tubes

✅ If using automatic dosing system, install AFTER the heat exchanger on the return to pool

✅ Maintain adequate space for tube stack removal (minimum 600mm clearance recommended)

✅ Ensure flow rates meet minimum requirements for efficient heat transfer

✅ Position heat exchanger to minimise pipe runs from heat source

⚠️ Professional Installation Recommended: For warranty compliance and optimal performance, we recommend installation by a qualified heating engineer or pool specialist.

📥 Downloads & Resources

📄 EC120-5113-3 Product Profile – Complete technical specifications, dimensions, and performance data (PDF)

🏆 Why Choose Bowman Heat Exchangers

✅ 100 Years of Expertise – EJ Bowman has been perfecting heat transfer technology since the early 1900s

✅ British Manufacturing Quality – Designed and manufactured in Birmingham, UK to exacting standards

✅ Proven Performance – Trusted by pool professionals worldwide for reliable, efficient heat transfer

✅ Premium Materials – Choice of titanium, cupro-nickel, or stainless steel to match your application

✅ Easy Maintenance – Removable tube stacks and accessible end covers simplify routine servicing

✅ Comprehensive Range – Models available from 80m³ to 130m³+ pool capacity to suit any installation

✅ 10 Year Warranty – Titanium models include full 10-year warranty on titanium materials

🛒 Why Buy from Parts4Tubs

✅ UK-Based Specialist – Dedicated pool and spa parts supplier with expert product knowledge

✅ Technical Support – Our team can help you select the right heat exchanger for your installation

✅ Fast UK Delivery – Quick dispatch on stock items to get your project moving

✅ Competitive Pricing – Great value on genuine Bowman heat exchangers

✅ After-Sales Support – Ongoing assistance with installation queries and spare parts

✅ Full Range Available – Access to the complete Bowman swimming pool heat exchanger range

✨ Summary

The Bowman EC120-5113-3C-SP represents the perfect choice for pool owners seeking efficient, renewable energy integration. With cupro-nickel construction delivering excellent durability, up to 70kW heat transfer capability, and specific optimisation for solar thermal systems, this heat exchanger combines Bowman’s century of expertise with modern eco-friendly heating demands. Suitable for pools up to 120m³ and backed by British manufacturing quality, the EC120-5113-3C-SP is a smart investment in sustainable pool heating.