Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Weil-McLain · Series
The SVF is Weil-McLain's commercial stainless steel vertical firetube condensing boiler, sold in sizes from 500 to 3000 MBH across four US product pages with thermal efficiency from 96.0% to 98.0%, a 160 psi maximum working pressure and 10:1 or 12:1 turndown.
Series facts
Thermal efficiency by page: 98.0% on the SVF 500/600, 97.7%/97.5% on the 725/850, 96.5% on the 1000 and 96.0–96.2% on the 1500–3000 Series 2.
Weil-McLain splits the SVF Stainless Vertical Firetube family across four current US product pages: 500–600 MBH, 725–850 MBH, 1000 MBH and the 1500–3000 MBH Series 2. Every page lists 160 psi maximum working pressure and thermal efficiency between 96.0% and 98.0% — 98.0% on the 500/600, 97.7% and 97.5% on the 725/850, 96.5% on the 1000 and 96.0–96.2% on the 1500–3000 Series 2 — with gross outputs from 490 to 2,886 MBH and 10:1 turndown (12:1 on the 600 and 850).
The pages describe a stainless steel vertical firetube boiler with integrated roller casters, a shipping ramp and 3-in-1 vent adapters for installation, a field-adjustable front- or side-mount controller and Unity/Unity 2.0 colour touchscreen controls. The 500–600 page's feature bullets call the heat exchanger a "Horizontal Cast Aluminum Section Heat Exchanger" while the product name and the commercial category list say stainless steel; Boilers.ca records the conflict rather than resolving it.
Connections step up with size: 2" NPT supply and 1-1/4" gas on the 500/600, 2-1/2" NPT supply on the 725/850, and 3" flange supply with 2" gas on the 1500–3000 Series 2, with 4", 6" or 8"/10" vent depending on the group. The pages carry a non-prorated 10-year heat exchanger warranty, a 2-year parts warranty and Modbus-to-BACnet/LonWorks building automation integration. The captured sources are US product pages and manuals; no Canadian availability statement was found.
Highlights
Non-prorated 10-year heat exchanger warranty and 2-year parts warranty, per the SVF product pages.
Models
One canonical page per model with input, output and efficiency kept separate.
Weil-McLain
The Weil-McLain SVF 500 is a current commercial stainless-steel vertical fire-tube condensing boiler: 500 MBH maximum input, 490 MBH gross output at 98% thermal efficiency, with a 10:1 turn-down, 2" NPT supply/return, 1-1/4" NPT gas and a 4" vent connection.
Weil-McLain
The Weil-McLain SVF 600 is a current commercial stainless-steel vertical fire-tube condensing boiler: 600 MBH maximum input, 588 MBH gross output at 98% thermal efficiency, with a 12:1 turn-down, 2" NPT supply/return, 1-1/4" NPT gas and a 4" vent connection.
Weil-McLain
The Weil-McLain SVF 725 is a current commercial stainless-steel vertical fire-tube condensing boiler: 725 MBH maximum input, 708 MBH gross output and a 616 MBH net AHRI rating at 97.7% thermal efficiency, with a 10:1 turn-down, 2-1/2" NPT supply/return, 1-1/4" NPT gas and a 6" vent connection.
Weil-McLain
The Weil-McLain SVF 850 is a current commercial stainless-steel vertical fire-tube condensing boiler: 850 MBH maximum input, 829 MBH gross output and a 721 MBH net AHRI rating at 97.5% thermal efficiency, with a 12:1 turn-down, 2-1/2" NPT supply/return, 1-1/4" NPT gas and a 6" vent connection.
Weil-McLain
The Weil-McLain SVF 1000 is a current commercial stainless-steel vertical fire-tube condensing boiler: 1000 MBH maximum input, 965 MBH gross output and a 839 MBH net AHRI rating at 96.5% thermal efficiency, with a 10:1 turn-down, 3" flange supply/return, 1-1/4" NPT gas and a 6" vent connection.
Weil-McLain
The Weil-McLain SVF 1500 S2 is a current commercial stainless-steel vertical fire-tube condensing boiler: 1500 MBH maximum input, 1400 MBH gross output at 96% thermal efficiency, with a 10:1 turn-down, 3" flange supply/return, 2" NPT gas and a 10"/8" vent connection.
Weil-McLain
The Weil-McLain SVF 2000 S2 is a current commercial stainless-steel vertical fire-tube condensing boiler: 2000 MBH maximum input, 1920 MBH gross output at 96% thermal efficiency, with a 10:1 turn-down, 3" flange supply/return, 2" NPT gas and a 10"/8" vent connection.
Weil-McLain
The Weil-McLain SVF 2500 S2 is a current commercial stainless-steel vertical fire-tube condensing boiler: 2500 MBH maximum input, 2400 MBH gross output at 96% thermal efficiency, with a 10:1 turn-down, 3" flange supply/return, 2" NPT gas and a 10"/10" vent connection.
Weil-McLain
The Weil-McLain SVF 3000 S2 is a current commercial stainless-steel vertical fire-tube condensing boiler: 3000 MBH maximum input, 2886 MBH gross output at 96.2% thermal efficiency, with a 10:1 turn-down, 3" flange supply/return, 2" NPT gas and a 10"/10" vent connection.
| Specification | Weil-McLain SVF 500 | Weil-McLain SVF 600 | Weil-McLain SVF 725 | Weil-McLain SVF 850 | Weil-McLain SVF 1000 | Weil-McLain SVF 1500 S2 | Weil-McLain SVF 2000 S2 | Weil-McLain SVF 2500 S2 | Weil-McLain SVF 3000 S2 |
|---|---|---|---|---|---|---|---|---|---|
| input-min | — | — | — | — | — | — | — | — | — |
| Maximum input | 500 MBH | 600 MBH | 725 MBH | 850 MBH | 1,000 MBH | 1,500 MBH | 2,000 MBH | 2,500 MBH | 3,000 MBH |
| output-max | — | — | — | — | — | — | — | — | — |
| afue | — | — | — | — | — | — | — | — | — |
| Turn-down ratio | 10:1 | 12:1 | 10:1 | 12:1 | 10:1 | 10:1 | 10:1 | 10:1 | 10:1 |
| vent-max-3 | — | — | — | — | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — | — | — | — | — |
| Approximate shipping weight | 572 lb | 572 lb | 675 lb | 675 lb | 1,750 lb | 2,500 lb | 2,500 lb | 2,700 lb | 2,700 lb |
Read the full comparison: Weil-McLain SVF 500 vs SVF 600 →
Read the full comparison: Weil-McLain SVF 600 vs SVF 725 →
Error codes and alerts
No alerts documented for this series yet.
Manuals
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.
Services for Weil-McLain boilers
Four current US pages cover the family: SVF 500/600, SVF 725/850, SVF 1000 and the SVF 1500/2000/2500/3000 Series 2, for a 500 to 3000 MBH range.
The captured SVF sources are US product pages and manuals and contain no Canadian availability statement, so Boilers.ca records Canadian availability as unknown.
Thermal efficiency is 98.0% on the 500/600, 97.7%/97.5% on the 725/850, 96.5% on the 1000 and 96.0–96.2% on the 1500–3000 Series 2, all at 160 psi maximum working pressure per the product pages.
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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.