🔥 Bowman Stainless Steel Heat Exchanger – 25kW (85,000 BTU) | EC80-5113-1S

🌡️ Compact British-Made Pool Heating Excellence – Efficient Heat Transfer for Pools up to 50,000 Litres

📋 Product Overview

The Bowman EC80-5113-1S Stainless Steel Heat Exchanger delivers 25kW (85,000 BTU/hr) of reliable heat transfer capacity, engineered specifically for residential swimming pools and spa installations. This compact shell-and-tube design efficiently transfers thermal energy from your boiler or heat source to your pool water, providing consistent and controllable heating throughout the swimming season.

Built with quality stainless steel tube construction inside a robust cast iron body, this heat exchanger represents over 100 years of Bowman heat transfer expertise. The efficient multi-tube design ensures maximum heat transfer surface area within a compact footprint, heating pools up to three times faster than many competitor products according to manufacturer testing.

Designed for pools up to 50m³ (11,000 gallons / approximately 50,000 litres), the EC80-5113-1S is the ideal choice for domestic pool owners seeking reliable, efficient heating performance. The unit integrates seamlessly with gas boilers, oil boilers, and conventional heating systems, making it a versatile solution for year-round pool enjoyment.

⭐ Key Features

✅ 25kW Heat Output (85,000 BTU/hr) – Powerful heat transfer capacity with 82°C boiler water, suitable for pools up to 50,000 litres

✅ Quality Stainless Steel Tubestack – Corrosion-resistant tube construction designed for chlorinated freshwater pool applications

✅ Compact Space-Efficient Design – Only 370mm total length with 86mm shell diameter, ideal for plant room installations with limited space

✅ Universal Fit End Covers – Composite end covers accommodate both metric (50mm) and imperial (48mm) pool pipework for easy installation

✅ Integral Thermostat Pocket – Built-in Ø7 x 40mm pocket on inlet end for accurate pool water temperature monitoring

✅ Flexible Mounting Options – Can be installed horizontally or vertically to suit your plant room layout

✅ Counter-Flow Design – Optimised heat transfer efficiency through counter-current water flow configuration

✅ Easy Maintenance Access – Removable tubestack and end covers for simple cleaning and servicing

✅ High Flow Capacity – Supports pool water flow rates up to 200 litres per minute (12.0 m³/hr)

✅ British Manufacturing Quality – Designed and manufactured in Birmingham, UK with over 100 years of heat transfer expertise

🔧 Technical Specifications

Specification	Details
Model Number	EC80-5113-1S
Heat Output (82°C Boiler Water)	25 kW / 85,000 BTU/hr
Heat Output (60°C Boiler Water)	16 kW / 55,000 BTU/hr
Shell Material	Cast Iron
Tube Material	Stainless Steel
Max Pool Volume	50 m³ / 11,000 gallons (approx. 50,000 litres)
Primary Flow Rate (Boiler)	3.0 m³/hr (50 litres/min)
Secondary Flow Rate (Pool Water)	12.0 m³/hr max (200 litres/min)
Max Operating Pressure	6 bar (both circuits)
Max Operating Temperature (Heating Side)	110°C
Max Operating Temperature (Pool Side)	100°C
Connections (Boiler/Heating)	3/4″ BSP Threaded
Connections (Pool Water)	Solvent Weld Ø48/Ø50mm (DN40 Pipe)
Thermostat Pocket	Ø7 x 40mm (Inlet End)
Overall Length	370mm
Shell Diameter	86mm
Mounting Centres	130mm
Weight (Dry)	3.0 kg
Warranty	12 months (manufacturing faults)

📊 Heat Transfer Performance

The EC80-5113-1S delivers efficient heat transfer across a range of operating conditions, with performance varying based on boiler water temperature:

🏊 Pool Heating Capacity:

• With 82°C Boiler Water: 25 kW (85,000 BTU/hr) – suitable for pools up to 50,000 litres
• With 60°C Boiler Water: 16 kW (55,000 BTU/hr) – suitable for pools up to 35,000 litres

⚡ Efficiency Factors:

The heat exchanger’s performance depends on several key variables:

• Boiler water inlet temperature (higher temperature = greater heat transfer)
• Maintaining optimal flow rates on both circuits
• Proper counter-flow installation configuration
• Correct sizing match between heat exchanger and pool volume
• Heat source capacity (boiler kW output)

💡 Design Note: Bowman heat exchangers feature more heat transfer tubes than many competitor products, enabling faster pool heating and reduced energy consumption according to manufacturer documentation.

⏱️ Heat-Up Times & Temperature Maintenance

⚠️ Important Information:

Heat-up times vary significantly based on multiple factors and are not specified in the manufacturer documentation for this model. The following variables directly affect heating performance:

• Heat source output – Your boiler or heat pump’s kW rating
• Starting water temperature – Colder water requires more energy to heat
• Target water temperature – Typical pool temperature is 28-30°C
• Pool insulation/cover usage – Covers reduce heat loss by up to 75%
• Ambient/outdoor temperature – Environmental heat loss factors
• Weather conditions – Wind and rain increase heat loss
• Heat exchanger sizing – Must match pool volume and heat source

ℹ️ Note: The manufacturer specifies that the performance capabilities are based on achieving a pool water temperature of 30°C. Actual heating times depend on your specific heat source, pool conditions, and environmental factors.

🛡️ Material & Compatibility Guide

Stainless Steel Construction – Ideal for Chlorinated Freshwater Pools

The EC80-5113-1S features a stainless steel tubestack, offering excellent heat transfer properties and corrosion resistance for standard pool water applications.

✅ Suitable For:

• Chlorinated freshwater swimming pools
• Standard pool chemical treatment (chlorine, bromine)
• Domestic and residential pool installations
• Integration with gas/oil boilers and conventional heating systems

❌ Not Suitable For:

• Salt water chlorinator systems
• Salt water pools
• Pools with chloride levels above 350 ppm

⚠️ Important: Stainless steel heat exchangers should NOT be used with salt water chlorinators or salt water pools. For salt water applications, consider the Titanium (EC80-5113-1T) or Cupro-Nickel variants.

Recommended Water Chemistry Limits (from manufacturer):

Parameter	Recommended Range
Free Chlorine	1.0 – 3.0 ppm
pH Level	7.2 – 7.8
Calcium Hardness	200 – 1000 ppm
Alkalinity	100 – 150 ppm
Bromine	2.0 – 4.0 ppm
Chloride	Less than 350 ppm

🎯 Applications & Use Cases

🏊‍♂️ Residential Swimming Pools – Perfect for domestic pools up to 50,000 litres requiring reliable, efficient heating from existing boiler systems

🛁 Spa & Hot Tub Installations – Compact size makes it ideal for spa heating applications where space is limited

🔥 Gas & Oil Boiler Integration – Designed for seamless connection to conventional heating systems with 3/4″ BSP connections

☀️ Backup for Solar Heating – Can supplement solar thermal systems for consistent pool temperatures during cloudy periods

🏠 New Build Pool Projects – Compact footprint suits modern plant room designs with space constraints

🔄 Boiler Replacement Upgrades – Easy integration when upgrading existing pool heating systems

🔨 Installation Considerations

Mounting Options:

The EC80-5113-1S can be installed either horizontally or vertically, providing flexibility for various plant room configurations.

Connection Requirements:

• Pool water connections: Solvent weld Ø48mm or Ø50mm (DN40 pipe)
• Boiler water connections: 3/4″ BSP threaded
• Universal Fit end covers accommodate both metric and imperial pipework

Critical Installation Points:

⚠️ Counter-Flow Installation Required – The heat exchanger MUST be installed so pool water flows in the opposite direction to the heating water. Failure to install in counter-flow configuration will significantly reduce performance.

⚠️ Thermostat Positioning – Install thermostat in the integral pocket on the pool water INLET side for accurate temperature monitoring.

⚠️ Dosing System Placement – If using automatic chemical dosing, install AFTER the heat exchanger with a non-return valve to prevent chemical damage.

⚠️ Installation Location – Install in a frost-free, dry area with a non-aggressive atmosphere. Ensure easy access for maintenance.

Flow Direction:

• Pool water inlet and outlet clearly marked on unit
• Boiler water inlet and outlet positions specified in documentation
• Correct flow direction essential for optimal performance

Professional Installation Recommended:

For warranty compliance and optimal performance, professional installation by a qualified plumber or pool engineer is strongly recommended. The installer should be familiar with the Bowman Installation, Operation & Maintenance Guide.

📥 Downloads & Resources

 Swimming Pool Heat Exchanger Brochure – Complete product range specifications and performance data (PDF)

 Installation, Operation & Maintenance Guide – Full technical installation instructions and maintenance procedures (PDF)

🏆 Why Choose Bowman Heat Exchangers

✅ 100+ Years of Heat Transfer Expertise – Bowman have been manufacturing heat exchangers since 1921, with over 60 years specialising in swimming pool applications

✅ British Manufacturing Excellence – Designed and built in Birmingham, UK to the highest quality standards

✅ Industry-Leading Performance – More heat transfer tubes than most competitors, heating pools up to three times faster

✅ Proven Worldwide Reliability – Tens of thousands of units operating efficiently around the world, from domestic spas to Olympic pools

✅ Comprehensive Range – Full selection of sizes and materials (Stainless Steel, Cupro-Nickel, Titanium) to suit any application

✅ 12 Month Warranty – All Bowman swimming pool heat exchangers guaranteed against manufacturing faults

🛒 Why Buy from Parts4Tubs

✅ UK-Based Pool Equipment Specialist – Dedicated expertise in pool and spa heating solutions

✅ Genuine Bowman Products – Authorised stockist of authentic Bowman heat exchangers

✅ Expert Technical Advice – Knowledgeable team to help you select the right heat exchanger for your pool

✅ Fast UK Delivery – Quick dispatch to get your pool heating project underway

✅ Competitive Pricing – Great value on quality pool heating equipment

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

✨ Summary

The Bowman EC80-5113-1S Stainless Steel Heat Exchanger delivers proven 25kW heating performance in a compact, professionally engineered package. Backed by over a century of British manufacturing expertise and trusted in installations worldwide, this unit offers the reliability and efficiency that discerning pool owners demand. Whether you’re heating a new pool or upgrading an existing system, the EC80-5113-1S provides excellent heat transfer for pools up to 50,000 litres – keeping your pool at the perfect temperature all season long.