Bosch Thermotechnology · Buderus G334X (Logano G334X)
Buderus G334X/73
The Buderus G334X/73 is a discontinued atmospheric cast-iron gas boiler with a 301 MBTU/hr ignition heat load, 249 MBTU/hr nominal output and 82.7% combustion efficiency.
Key figures
- Max input
- —
- Max CSA output
- —
- AFUE
- —
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Buderus G334X/73 in practice
Best suited to
Applicability and support
- Model number
- G334X/73
- Canadian availability
- historical
- Production status
- discontinued
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Bosch Thermotechnology. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Ignition heat load | 301 MBTU/hr | 301,000 BTU/hr per the dimensions table. |
| Output | ||
| Nominal output | 249 MBTU/hr | 249,000 BTU/hr. |
| Net IBR rating | 217 MBH | |
| Efficiency | ||
| Combustion efficiency | 82.7 % | Buderus G124X/G234X/G334X brochure; no AFUE row is printed for the G334X. |
| Venting and air | ||
| Vent size | 8" | Atmospheric gas boiler with draft hood; optional vent damper. |
| Physical and connections | ||
| Number of burner rods | 5 | |
| Dry weight | 758 lb | |
| Water volume | 9.2 US gal | |
| Operating limits and other | ||
| Gas connection | 3/4" | |
| Fuel | Natural gas or propane | NG and LP orifice tables are printed in the manual, including 8,501-12,000 ft data. |
Manuals
- Logano G334X Installation and Service Instructions (6 720 811 237, 2017/02)6 720 811 237 · 2017-02
Alerts documented for this model
None documented yet.
Questions about the Buderus G334X/73?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- Bosch Home Comfort US — Discontinued Buderus Products (G334X) · accessed September 9, 2026
- Logano G334X Installation and Service Instructions (6 720 811 237) · accessed September 9, 2026
- Buderus G124X/G234X/G334X Brochure · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.