Bosch Thermotechnology · Buderus G315 (Logano G315)
Buderus G315/7
The Buderus G315/7 is a discontinued commercial cast-iron boiler block with 7 sections, 678 MBtu/h gas input (4.7 GPH oil) and a 486 MBtu/h IBR rating.
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 G315/7 in practice
Best suited to
Applicability and support
- Model number
- G315/7
- 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 | ||
| Gas input | 678 MBtu/h | Per the engineering submittal sheet performance data. |
| Oil input | 4.7 GPH | No. 2 fuel oil; burner selection by Bosch's approved list. |
| Output | ||
| Rated gross output | 559 MBtu/h | |
| IBR rating | 486 MBtu/h | |
| Efficiency | ||
| AHRI natural-gas combustion efficiency | 84.4 % | |
| AHRI natural-gas thermal efficiency | 82.4 % | |
| AHRI oil combustion efficiency | 87 % | |
| AHRI oil thermal efficiency | 84.9 % | |
| Physical and connections | ||
| Boiler sections | 7 | |
| Heating surface | 74.3 sq ft | |
| Maximum allowable working pressure | 87 psig | Sections labeled for 87 psig; standard relief valve 50 psi. |
| Maximum supply water temperature | 248 °F | 120 °C. |
| Water content | 52.6 gal | |
| Weight, shipping (approx.) | 1,585 lb | |
| Weight, operating (approx.) | 2,024 lb | |
| Operating limits and other | ||
| Boiler horsepower | 16.6 HP | |
| Boiler supply and return | 3" | RK return and VK supply. |
| Allowable fuels | Natural gas, LP, oil #2 | Boiler block for forced-draft firing; burner supplied separately. |
Manuals
- Logano G315 Installation and Service Instructions (6 720 817 939, 02.2017)6 720 817 939 · 2017-02
- G315/7 Engineering Submittal Sheet (BTC 411008101 B, 06.2015)BTC 411008101 B · 2015-06
Alerts documented for this model
None documented yet.
Questions about the Buderus G315/7?
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 — Commercial Products - Discontinued: Discontinued Boilers · accessed September 9, 2026
- G315/7 Engineering Submittal Sheet (BTC 411008101 B) · accessed September 9, 2026
- Buderus G315/G515/G615 Brochure · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.