Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Buderus G124X/25 and Buderus G124X/32 are two non-condensing boilers from the Bosch Thermotechnology Buderus G124X (Logano G124X II/SP) line. Published ratings: Buderus G124X/25 at 103 MBH input, 75 MBH net rating and 84.2% AFUE; Buderus G124X/32 at 132.5 MBH input, 96 MBH net rating and 84.6% AFUE. Buderus G124X/32 lists 29.5 MBH more input than Buderus G124X/25 (132.5 MBH against 103 MBH). Buderus G124X/32 carries the higher published AFUE at 84.6%, against 84.2%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Buderus G124X/25 | Buderus G124X/32 |
|---|---|---|
| Input rate | 103 MBH | 132.5 MBH |
| Net IBR rating | 75 MBH | 96 MBH |
| DOE heating capacity | 85.5 MBH | 110 MBH |
| Efficiency (AFUE) | 84.2 % | 84.6 % |
| Fuel | Natural gas or propane | Natural gas or propane |
| Dry weight | 240 lb | 337 lb |
| Water content | 2.9 US gal | 3.4 US gal |
| Vent connection (B-Vent II) | 5" | 6" |
| Gas connection | 1/2" | 1/2" |
| Boiler supply and return | 1" | 1" |
Published ratings: the Buderus G124X/25 is rated 103 MBH input, 75 MBH net rating and 84.2% AFUE; the Buderus G124X/32 is rated 132.5 MBH input, 96 MBH net rating and 84.6% AFUE. Buderus G124X/32 lists 29.5 MBH more input than Buderus G124X/25 (132.5 MBH against 103 MBH). Buderus G124X/32 carries the higher published AFUE at 84.6%, against 84.2%.
The dry weight differs: the Buderus G124X/25 lists 240 lb, while the Buderus G124X/32 lists 337 lb. The water content differs: the Buderus G124X/25 lists 2.9 US gal, while the Buderus G124X/32 lists 3.4 US gal. The vent connection differs: the Buderus G124X/25 lists 5", while the Buderus G124X/32 lists 6".
Both records print the same fuel (Natural gas or propane), gas connection (1/2") and boiler supply and return (1"), per the cited sources.
Bosch Thermotechnology
The Buderus G124X/25 is a discontinued atmospheric cast-iron gas boiler rated 103 MBH input with 84.2% AFUE, 75 MBH net IBR rating and a 240 lb dry weight.
Bosch Thermotechnology
The Buderus G124X/32 is a discontinued atmospheric cast-iron gas boiler rated 132.5 MBH input with 84.6% AFUE, 96 MBH net IBR rating and a 337 lb dry weight.
The Buderus G124X/32 lists 132.5 MBH, against 103 MBH on the Buderus G124X/25, per the cited documentation.
The Buderus G124X/32 carries the higher published AFUE at 84.6%, against 84.2%.
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.