Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The SFC 125-1 and SFC 199-1 are the two largest SFC combis: the 199-1 lifts space heating to 125 MBH input (111 MBH CSA output) and DHW to 199 MBH with 5 GPM continuous delivery and a 7 GPM peak, adds a built-in DHW bypass valve and wireless cascade, and weighs 1 lb less than the 125-1.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | IBC SFC 125-1 Superflow | IBC SFC 199-1 Superflow |
|---|---|---|
| Heating input, minimum | 16.5 MBH | 28.5 MBH |
| Heating input, maximum | 99 MBH | 125 MBH |
| DHW input, maximum | 125 MBH | 199 MBH |
| CSA output, maximum | 89 MBH | 111 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Weight (empty) | 85 lb | 84 lb |
| Max. equivalent vent length, 2" | 65 ft | 65 ft |
| Max. equivalent vent length, 3" | 120 ft | 120 ft |
| Max. DHW flow rate | 4 GPM | 7 GPM |
| Gas connection | 3/4" NPT | 3/4" NPT |
Unlike the step from the 99 to the 125, moving to the SFC 199-1 raises both sides of the appliance: space-heating input goes from 99 to 125 MBH (CSA output from 89 to 111 MBH) and DHW input from 125 to 199 MBH.
The DHW gains are the headline: continuous delivery rises from 3.2 to 5.0 GPM (67°F rise) and maximum DHW flow from 4 to 7 GPM. The 199-1 also carries the built-in bypass valve that steadies DHW temperature and supports wireless cascading of up to eight units.
Both models weigh about the same (85 vs 84 lb) and share the 2" (65 ft) and 3" (120 ft) venting and 95% AFUE rating. The 199-1's higher DHW input means the gas supply and venting must support firing to 199 MBH during hot-water draws.
IBC Technologies
The IBC SFC 125-1 Superflow is a wall-hung condensing combi boiler rated 95% AFUE: up to 99 MBH for space heating and 125 MBH for domestic hot water, with 3.2 GPM continuous DHW delivery at a 67°F rise.
IBC Technologies
The IBC SFC 199-1 is the largest Superflow combi: 95% AFUE, up to 125 MBH for space heating and 199 MBH for hot water, 5 GPM continuous DHW at a 67°F rise, with wireless cascade of up to eight units on the SFC 199-1.
Heating input rises from 99 to 125 MBH, DHW delivery from 3.2 to 5.0 GPM continuous, peak DHW flow from 4 to 7 GPM, plus a built-in bypass valve and wireless cascade capability.
The 199-1 can fire to 199 MBH during DHW draws, so the gas supply must be sized for that input. A technician confirms this during the assessment.
Yes. The SFC 125-1 and SFC 199-1 are both rated 95% AFUE by IBC; the smaller SFC 99-1 is rated 96%.
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 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.