Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Buderus GC144 II 25/4 and Buderus GC144 II 32/5 are two non-condensing boilers from the Bosch Thermotechnology Buderus GC144 II (Logano GC 144 II) line. Published ratings: Buderus GC144 II 25/4 at 103 MBH input; Buderus GC144 II 32/5 at 132.5 MBH input. Buderus GC144 II 32/5 lists 29.5 MBH more input than Buderus GC144 II 25/4 (132.5 MBH against 103 MBH).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Buderus GC144 II 25/4 | Buderus GC144 II 32/5 |
|---|---|---|
| Boiler input | 103 MBH | 132.5 MBH |
| Maximum operating pressure | 58 psi | 58 psi |
| Fuel | Natural gas or propane | Natural gas or propane |
| Dry weight | 287 lb | 349.5 lb |
| Water volume | 2.9 US gal | 3.4 US gal |
| Vent connection | 5" | 6" |
| Maximum boiler temperature | 220 °F | 220 °F |
Published ratings: the Buderus GC144 II 25/4 is rated 103 MBH input; the Buderus GC144 II 32/5 is rated 132.5 MBH input. Buderus GC144 II 32/5 lists 29.5 MBH more input than Buderus GC144 II 25/4 (132.5 MBH against 103 MBH).
The dry weight differs: the Buderus GC144 II 25/4 lists 287 lb, while the Buderus GC144 II 32/5 lists 349.5 lb. The water volume differs: the Buderus GC144 II 25/4 lists 2.9 US gal, while the Buderus GC144 II 32/5 lists 3.4 US gal. The vent connection differs: the Buderus GC144 II 25/4 lists 5", while the Buderus GC144 II 32/5 lists 6".
Both records print the same maximum operating pressure (58 psi), fuel (Natural gas or propane) and maximum boiler temperature (220 °F), per the cited sources.
Bosch Thermotechnology
The Buderus GC144 II 25/4 is a discontinued atmospheric cast-iron gas boiler rated 103,000 BTU/hr input with a 287 lb dry weight and 2.9 US gal water volume.
Bosch Thermotechnology
The Buderus GC144 II 32/5 is a discontinued atmospheric cast-iron gas boiler rated 132,500 BTU/hr input with a 349.5 lb dry weight and 3.4 US gal water volume.
The Buderus GC144 II 32/5 lists 132.5 MBH, against 103 MBH on the Buderus GC144 II 25/4, per the cited documentation.
Both list the same maximum operating pressure, fuel and maximum boiler temperature, per the cited sources.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.