Bowman EC100-5113-2C Heat Exchanger | 40kW / 135,000 BTU Cupro-Nickel Swimming Pool Heater

 Professional-Grade Heat Transfer for Medium-Sized Pools – British Engineering Excellence with Easy Solvent Weld Installation

 Product Overview

The Bowman EC100-5113-2C is a high-performance swimming pool heat exchanger delivering 40kW (135,000 BTU/h) of heat transfer capacity when paired with an 82°C boiler system. Engineered by Bowman – a British manufacturer with over 100 years of heat transfer expertise – this unit represents the perfect balance of power, efficiency, and durability for medium-sized pool installations.

Featuring a robust cupro-nickel tubestack housed within a cast iron body with durable composite end covers, the EC100-5113-2C is designed for straightforward integration into existing pool pipework via solvent weld connections. The integrated 7mm thermostat pocket enables precise temperature monitoring, while the ‘Universal Fit’ end cover design accommodates both metric (50mm) and imperial (48mm) pipework.

Suitable for pools up to 80,000 litres (18,000 gallons), this heat exchanger is ideal for residential pools, small commercial installations, and spa facilities using chlorinated freshwater systems.

 Key Features

 40kW (135,000 BTU/h) heat transfer capacity at 82°C boiler water temperature – powerful heating for pools up to 80,000 litres

 Cupro-nickel tubestack – excellent corrosion resistance for chlorinated freshwater pools with superior heat transfer properties

 ‘Universal Fit’ composite end covers – accommodates both 48mm and 50mm pool pipework for flexible installation

 Integrated 7mm thermostat pocket – enables accurate pool water temperature monitoring at the inlet

 Solvent weld connections – simple, professional integration directly into pool pipework

 Compact lightweight design – only 4.5kg dry weight for easy handling and installation

 6 bar maximum working pressure – suitable for demanding commercial and residential applications

 Counter-flow design – maximises heat transfer efficiency between boiler and pool water circuits

 Easy maintenance access – removable tubestack and end covers for straightforward cleaning

 Compatible with boilers, solar panels, and heat pumps – versatile heat source integration

 Technical Specifications

Specification	Details
Model Number	EC100-5113-2C
Heat Output (82°C Boiler Water)	40kW / 135,000 BTU/h
Heat Output (60°C Boiler Water)	22kW / 75,000 BTU/h
Shell Material	Cast Iron Body
End Cover Material	High-Grade Composite Plastic
Tube Material	Cupro-Nickel
Max Pool Volume	80,000 litres / 80m³ (18,000 gallons)
Boiler Water Flow Rate	2.4 m³/h (40 l/min)
Max Pool Water Flow Rate	10.2 m³/h (170 l/min)
Max Operating Pressure	6 bar (both circuits)
Max Operating Temperature (Heating Side)	110°C
Max Operating Temperature (Pool Side)	100°C
Pool Water Connections	Solvent Weld Ø48mm or Ø50mm (DN40 Pipe)
Boiler Water Connections	¾” BSP Threaded
Overall Length	456mm
Body Diameter	86mm
Mounting Centres	140mm
Thermostat Pocket	Ø7mm x 40mm deep (inlet end)
Weight (Dry)	4.5 kg
Warranty	12 months (manufacturing faults)

 Heat Transfer Performance

The EC100-5113-2C delivers variable heat output depending on your heat source temperature:

 Pool Heating Performance:

Heat Source Temperature	Heat Output	Suitable Pool Volume
82°C (Boiler)	40kW / 135,000 BTU/h	Up to 80,000 litres
60°C (Boiler/Heat Pump)	22kW / 75,000 BTU/h	Up to 80,000 litres

 Performance Specifications (from Manufacturer Documentation):

• Target pool water temperature: 30°C (basis of all performance data)
• Boiler water flow rate: 2.4 m³/h (40 litres/min)
• Maximum pool water flow rate: 10.2 m³/h (170 litres/min)
• Heat transfer optimised through counter-flow installation

 Performance figures are based on manufacturer testing with pool water at 30°C target temperature. Actual heat transfer depends on maintaining specified flow rates and temperature differentials.

 Heat-Up Times & Temperature Maintenance

 Heat-up times vary based on multiple factors including:

• Heat source output (boiler/heat pump kW rating)
• Starting water temperature vs target temperature
• Ambient air temperature and weather conditions
• Pool insulation and cover usage
• Heat exchanger sizing match to pool volume
• System flow rates and circulation efficiency

The EC100-5113-2C can transfer up to 40kW of heat energy when supplied with 82°C boiler water. This is the rate at which heat enters your pool – actual heating times depend entirely on your specific installation conditions.

 Note: Heat exchangers are passive devices that transfer heat from your boiler or heat pump to the pool water. They do not generate heat themselves – heating performance depends on your primary heat source capacity.

 Material & Compatibility Guide

Cupro-Nickel Tubestack – The Smart Choice for Freshwater Pools

The EC100-5113-2C features a cupro-nickel tubestack, offering an excellent balance of corrosion resistance, heat transfer efficiency, and value for freshwater pool applications.

 Ideal For:

• Chlorinated freshwater swimming pools
• Spa and hot tub installations
• Indoor and outdoor pools with standard chemical treatment
• Residential and light commercial applications

 Key Properties:

• Excellent resistance to chlorinated freshwater
• Superior thermal conductivity for efficient heat transfer
• Long operational lifespan with proper water chemistry
• Cost-effective durability

 Not Recommended For:

• Salt water pools
• Pools with salt water chlorinators
• High-salinity water applications

Water Chemistry Requirements (Manufacturer Specified):

Parameter	Recommended Range
Free Chlorine	1.0 – 3.0 ppm
pH Level	7.2 – 7.8
Calcium Hardness	200 – 400 ppm
Alkalinity	100 – 150 ppm
Bromine	2.0 – 4.0 ppm
Chloride	Less than 150 ppm

 For salt water pools or installations with salt water chlorinators, consider the EC100-5113-2T (Titanium) model which offers complete salt water compatibility with a 10-year tubestack guarantee.

 Applications & Use Cases

 Residential Swimming Pools – Perfect for medium-sized home pools up to 80,000 litres requiring reliable, efficient heating

 Hot Tubs & Spas – Provides rapid heat-up capability for commercial and high-end residential spa installations

 Small Commercial Pools – Suitable for hotel pools, leisure centres, and wellness facilities with moderate heating demands

 Boiler Integration – Designed for use with gas, oil, or biomass boilers operating at 60-82°C flow temperatures

 Solar Thermal Systems – Compatible with solar panel installations for renewable pool heating

 Heat Pump Connection – Works effectively with air source and ground source heat pumps

Typical Installation Scenarios:

• Garden swimming pools with gas or oil boiler heating
• Outdoor pools requiring extended season use
• Indoor pools with central heating integration
• Renovation projects upgrading existing heating systems
• New build pools requiring professional-grade heating

 Installation Considerations

Mounting Options:

• Horizontal or vertical mounting permitted
• Install in frost-free, dry location with non-aggressive atmosphere
• Ensure easy access for maintenance and inspection

Connection Requirements:

• Pool water: Solvent weld to 48mm or 50mm (DN40) pipework
• Boiler water: ¾” BSP threaded connections
• Counter-flow installation essential (pool water flows opposite to heating water)

System Integration:

• Install downstream of pump and filtration equipment
• Boiler/heat pump circuit must be pump-assisted
• Fit isolation valves on all connections
• Install dosing systems downstream with non-return valve
• Position thermostat at pool water inlet to heat exchanger

Flow Direction:

• Critical: Counter-flow installation required for optimal performance
• Pool water and heating water must flow in opposite directions
• Incorrect installation will significantly reduce heat transfer efficiency

Thermostat Pocket:

• Ø7mm x 40mm deep pocket at inlet end
• Use for pool water temperature monitoring
• Controls heat source operation based on pool temperature

 Professional Installation Recommended: For warranty compliance and optimal performance, we recommend installation by a qualified heating engineer or pool technician familiar with heat exchanger systems.

 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 has been manufacturing heat exchangers since the early 1900s, establishing them as the acknowledged brand leader

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

 Proven Global Performance – Tens of thousands of units operating reliably worldwide, from residential pools to Olympic facilities

 Superior Heat Transfer Design – More heat transfer tubes than most competitors, delivering up to 3x faster heating

 Comprehensive Material Options – Choose cupro-nickel, stainless steel, or titanium tubestacks to match your water type

 10-Year Titanium Guarantee – Titanium models come with a full 10-year warranty on all titanium material in contact with pool water

 Easy Maintenance – Removable tubestack and end covers make cleaning and servicing straightforward

 Extensive Spare Parts Availability – Full range of replacement components readily available

 Why Buy from Parts4Tubs

 UK-Based Pool Heating Specialists – Expert knowledge of swimming pool and spa heating systems

 Technical Advice Available – Our team can help you select the right heat exchanger for your specific application

 Competitive Pricing – Great value on genuine Bowman products

 Fast UK Delivery – Quick dispatch to get your project moving

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

 Genuine Manufacturer Products – Authentic Bowman heat exchangers with full warranty support

 Summary

The Bowman EC100-5113-2C delivers professional-grade pool heating performance in a compact, easy-to-install package. With 40kW heat transfer capacity, durable cupro-nickel construction, and Bowman’s proven engineering excellence, this heat exchanger is the ideal choice for medium-sized freshwater pools up to 80,000 litres. British-built quality, straightforward solvent weld installation, and comprehensive after-sales support make this unit a reliable investment for years of comfortable swimming.