Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Weil-McLain · Series
The SlimFit is Weil-McLain's commercial condensing boiler with a cast aluminum sectional heat exchanger, five sizes from SF550 to SF2000 covering 550–2,000 MBH, Category II/IV venting and Unity controls.
Series facts
The SlimFit Commercial Condensing Gas Boiler covers five sizes — SF550, SF750, SF1000, SF1500 and SF2000 — with maximum inputs of 550 to 2,000 MBH (minimum inputs 110 to 333 MBH) and gross outputs of 516, 702, 958, 1,437 and 1,906 MBH per the US spec table. The page presents it for new and existing commercial and institutional buildings, including religious, educational and government facilities.
The page describes a horizontal cast aluminum sectional heat exchanger, integrated roller casters and shipping ramp, a base that can be disassembled for tight boiler-room access, a field-adjustable front- or side-mount controller and Unity controls. Venting is certified Category II / Category IV, in PVC, CPVC, PP, ABS or AL29-4C with 6" or 8" diameter and runs up to 100 ft (150 ft on the SF1000) depending on size; the page lists natural gas with optional LP on the smaller sizes.
Warranty terms on the page are a non-prorated 10-year heat exchanger warranty and a 2-year parts warranty, and the boiler supports Modbus to BACnet and LonWorks. 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 SlimFit product page.
Models
One canonical page per model with input, output and efficiency kept separate.
Weil-McLain
The Weil-McLain SF550 is a current commercial condensing gas boiler in the SlimFit line: 110–550 MBH input, 516 MBH gross output and 450 MBH net AHRI at up to 94.7% combustion efficiency, with 6" venting and a sectional aluminium block heat exchanger.
Weil-McLain
The Weil-McLain SF750 is a current commercial condensing gas boiler in the SlimFit line: 150–750 MBH input, 702 MBH gross output and 610 MBH net AHRI at up to 94% combustion efficiency, with 6" or 8" venting and a sectional aluminium block heat exchanger.
Weil-McLain
The Weil-McLain SF1000 is a current commercial condensing gas boiler in the SlimFit line: 167–1000 MBH input, 958 MBH gross output and a 1833 MBH net printed page rating at up to 96.1% combustion efficiency, with 6" or 8" venting and a sectional aluminium block heat exchanger.
Weil-McLain
The Weil-McLain SF1500 is a current commercial condensing gas boiler in the SlimFit line: 250–1500 MBH input, 1437 MBH gross output and a 1250 MBH net printed page rating at up to 96.1% combustion efficiency, with 8" venting and a sectional aluminium block heat exchanger.
Weil-McLain
The Weil-McLain SF2000 is a current commercial condensing gas boiler in the SlimFit line: 333–2000 MBH input, 1906 MBH gross output and a 1657 MBH net printed page rating at up to 96.1% combustion efficiency, with 8" venting and a sectional aluminium block heat exchanger.
| Specification | Weil-McLain SF550 | Weil-McLain SF750 | Weil-McLain SF1000 | Weil-McLain SF1500 | Weil-McLain SF2000 |
|---|---|---|---|---|---|
| Minimum input | 110 MBH | 150 MBH | 167 MBH | 250 MBH | 333 MBH |
| Maximum input | 550 MBH | 750 MBH | 1,000 MBH | 1,500 MBH | 2,000 MBH |
| output-max | — | — | — | — | — |
| afue | — | — | — | — | — |
| Turn-down ratio | 6:1 | 6:1 | 6:1 | 6:1 | 6:1 |
| vent-max-3 | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — |
| weight | — | — | — | — | — |
Read the full comparison: Weil-McLain SF550 vs SF750 →
Read the full comparison: Weil-McLain SF750 vs SF1000 →
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
Five sizes: SF550, SF750, SF1000, SF1500 and SF2000, covering 550–2,000 MBH maximum input with minimum inputs of 110–333 MBH per the page spec table.
It is certified for Category II / Category IV venting in PVC, CPVC, PP, ABS or AL29-4C, with 6" or 8" vent/air pipe depending on size and runs up to 100 ft (150 ft on the SF1000).
The captured SlimFit sources are US product pages and manuals and contain no Canadian availability statement, so Boilers.ca records Canadian availability as unknown.
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
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.