- Bowman Heat Exchanger 20kw (68,000 BTU) Cupro Nickel Tube Code : EC80-5113-1C
- Bowman Heat Exchanger 20kw (68,000 BTU) Titanium Code : EC80-5113-1T
- Bowman Heat Exchanger 70kw (240,000 BTU) Cupro Nickel Tube Code : EC120-5113-3C
- Bowman Heat Exchanger 70kw (240,000 BTU) Titanium Code : EC120-5113-3T
- Bowman Heat Exchanger 100kw (340,000 BTU) Cupro Nickel Tube Code : FC100-5114-2C
- Bowman Heat Exchanger 100kw (340,000 BTU) Titanium Code : FC100-5114-2T