🔥 Bowman FG100-5115-2S Stainless Steel Heat Exchanger | 170kW Commercial Pool Heating

🌡️ High-Capacity British-Engineered Heat Transfer for Large Commercial & Institutional Pools

📋 Product Overview

The Bowman FG100-5115-2S is a premium shell and tube heat exchanger from EJ Bowman, backed by over 100 years of heat transfer technology expertise. Designed specifically for large commercial and institutional swimming pools up to 250m³ (55,000 gallons), this stainless steel model delivers exceptional heat transfer performance when connected to a boiler heat source.

Engineered in Birmingham, UK, this heat exchanger features robust stainless steel tube construction housed within a corrosion-resistant shell. The cast end covers are finished in Bowman’s advanced ‘C’ coat technology, providing superior corrosion resistance and long-term durability.

The FG100-5115-2S is ideal for freshwater pool installations where reliable, high-capacity heating is essential. Whether you’re heating a competition pool, leisure centre, or commercial training facility, this heat exchanger provides consistent, efficient heat transfer to maintain optimal water temperatures.

⭐ Key Features

✅ High Heat Transfer Capacity – Up to 170kW heat output at optimal flow rates with 82°C boiler water supply

✅ Durable Stainless Steel Tube Core – Robust construction for long-lasting performance in freshwater applications

✅ Advanced ‘C’ Coat End Covers – Highly corrosion-resistant coating technology on cast end covers

✅ Large Pool Capacity – Suitable for pools up to 250m³ (55,000 gallons)

✅ Flexible Installation – Can be mounted horizontally or vertically with included mounting brackets

✅ Easy Maintenance Access – Removable tube stack design for straightforward routine maintenance

✅ Integrated Thermostat Pocket – Built-in 7mm x 52mm thermostat pocket for temperature monitoring

✅ High Flow Capability – Maximum pool water flow rate of 33.0m³/h (550 l/min)

✅ 100 Years of British Engineering – Backed by EJ Bowman’s century of heat transfer expertise

🔧 Technical Specifications

Specification	Details
Model Number	FG100-5115-2S
Tube Material	Stainless Steel
Shell Coating	‘C’ Coat (Advanced Corrosion Resistant)
Typical Pool Capacity	250m³ (55,000 gallons)
Typical Heat Transfer	170kW (with boiler heating at optimal flow)
Maximum Pool Water Flow	33.0m³/h (550 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)
Pool Water Connections	2½” BSP
Hot Water Connections (Boiler)	1¼” BSP
Thermostat Pocket	Ø7mm x 52mm depth
Overall Length	470mm
Mounting Hole Centres	294mm (length), 190mm x 160mm
Shell Diameter	128mm
Weight (Dry)	15kg
Manufacturer	EJ Bowman (Birmingham) Ltd, UK

📊 Heat Transfer Performance

The Bowman FG100-5115-2S delivers variable heat transfer output depending on your boiler water temperature and flow rates. The following performance data is taken directly from the manufacturer documentation.

🔥 Heat Output at Different Boiler Temperatures

Based on pool water flow of 480 l/min at 28°C

Hot Water Flow Rate	82°C Boiler	70°C Boiler	60°C Boiler	45°C Boiler
40 l/min	90 kW	69 kW	52 kW	27 kW
60 l/min	114 kW	87 kW	65 kW	34 kW
80 l/min	132 kW	101 kW	76 kW	39 kW
100 l/min	147 kW	113 kW	85 kW	44 kW
120 l/min	159 kW	122 kW	92 kW	47 kW
140 l/min	170 kW	130 kW	98 kW	51 kW

⚡ Efficiency Factors

The heat exchanger’s performance is directly influenced by:

• Boiler water temperature – Higher temperatures deliver greater heat transfer
• Hot water flow rate – Optimal performance at 140 l/min on the primary circuit
• Pool water flow rate – Designed for flows up to 550 l/min on the secondary circuit
• Temperature differential – Greater difference between boiler and pool water increases efficiency
• Proper sizing – Matching the heat exchanger to your pool volume and heat source capacity

⚠️ Important: If flow rates on either the hot water supply or pool water circuit are too low, the heat exchanger will not perform at designed efficiency and will be unable to transfer all available heat energy into the pool water.

⏱️ Heat-Up Times & Temperature Maintenance

⚠️ Heat-up times vary based on multiple factors including:

• Heat source output (boiler kW rating)
• Starting water temperature
• Target water temperature
• Pool cover usage
• Ambient/outdoor temperature
• Heat exchanger sizing match
• Pool insulation quality
• Weather conditions and heat losses

🛡️ Material & Compatibility Guide

Stainless Steel Construction

The FG100-5115-2S features a stainless steel tube core, making it suitable for:

✅ Freshwater swimming pools

✅ Standard chlorinated pool water

✅ Indoor and outdoor pool installations

✅ Commercial and institutional facilities

✅ Boiler-fed heating systems

⚠️ Important Compatibility Warning

❌ NOT suitable for use with salt water chlorinators

❌ NOT suitable for salt water pools

For salt water or high-chlorine environments, consider the Bowman FG100-5115-2T (Titanium) or FG100-5115-2C (Cupro-Nickel) models instead.

Why Choose Stainless Steel?

Stainless steel offers excellent durability and heat transfer properties for freshwater applications at an economical price point. The material provides reliable corrosion resistance against standard pool chemicals while delivering efficient thermal performance.

🎯 Applications & Use Cases

The Bowman FG100-5115-2S is designed for demanding commercial applications:

🏊‍♂️ Large Commercial Pools – Competition pools, public swimming facilities, and municipal pools up to 250m³

🏢 Leisure Centres – Multi-pool complexes requiring reliable, high-capacity heating

🏋️ Training Facilities – Sports centres, athletic training pools, and rehabilitation pools

🎓 Institutional Pools – Schools, universities, and college swimming facilities

🏨 Hospitality – Hotels, resorts, and holiday parks with large freshwater pools

🔥 Boiler Integration – Designed specifically for connection to commercial boiler systems

☀️ Solar Thermal Systems – Compatible with solar heating integration (as secondary heat source)

🔨 Installation Considerations

Mounting Options

The FG100-5115-2S can be installed in either horizontal or vertical orientation, providing flexibility for various plant room configurations.

• Mounting brackets included with the unit
• Mounting hole centres: 294mm (length), 190mm x 160mm (width)
• Shell diameter: 128mm – ensure adequate clearance for maintenance access

Connection Requirements

• Pool Water Circuit: 2½” BSP connections
• Boiler/Hot Water Circuit: 1¼” BSP connections
• Thermostat Pocket: Ø7mm x 52mm for temperature sensor installation

Flow Direction

Correct flow direction is essential for optimal performance:

• Hot water enters and exits through the shell side (1¼” BSP)
• Pool water flows through the tube side (2½” BSP)
• Refer to manufacturer diagrams for inlet/outlet positions

Installation Best Practices

• Install isolation valves on both circuits for maintenance access
• Position the heat exchanger after the filter in the pool water circuit
• If using an automatic dosing system, install it after the heat exchanger on the return to the pool
• Ensure adequate water flow rates are maintained for optimal heat transfer
• Consider installing a non-return valve on the boiler circuit

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

📥 Downloads & Resources

📄 Bowman FG100-5115-2 Product Brochure – Complete technical specifications, heat transfer tables, pressure drop data, and installation diagrams (PDF)

🏆 Why Choose Bowman Heat Exchangers

✅ 100 Years of British Engineering Excellence – EJ Bowman has been manufacturing heat transfer solutions in Birmingham, UK since 1922

✅ Premium Material Quality – Advanced ‘C’ coat technology and quality-controlled tube materials

✅ Proven Performance – Trusted by commercial pool operators, leisure centres, and institutions worldwide

✅ Comprehensive Range – Available in Titanium, Cupro-Nickel, and Stainless Steel to match any water type

✅ Designed for Longevity – Removable tube stack design enables easy maintenance and extends service life

✅ Technical Support – Backed by manufacturer expertise and detailed performance documentation

🛒 Why Buy from Parts4Tubs

✅ UK-Based Pool Heating Specialists – Expert knowledge of commercial and domestic pool heating systems

✅ Competitive Pricing – Trade and retail pricing on genuine Bowman products

✅ Technical Advice – Speak to our team for help selecting the right heat exchanger for your application

✅ Fast UK Delivery – Quick dispatch on in-stock items

✅ Genuine Products – Authorised supplier of authentic Bowman heat exchangers

✅ After-Sales Support – Continued assistance with installation queries and technical questions

✨ Summary

The Bowman FG100-5115-2S Stainless Steel Heat Exchanger delivers powerful, reliable heat transfer for large commercial freshwater pools up to 250m³. With up to 170kW heat output, flexible mounting options, and century-proven British engineering, this unit is the ideal choice for leisure centres, competition pools, and institutional facilities. Backed by Bowman’s advanced ‘C’ coat corrosion protection and designed for easy maintenance access, the FG100-5115-2S provides dependable performance season after season.