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
Comparison
Verdict in brief
The VSPH-90 and VSPH-120 are the second and third Victory VSPH sizes — discontinued NON-condensing cast-iron direct-vent boilers with identical 3" AL29-4C stainless venting and 50 psi MAWP. The 120 fires 120,000 Btuh across 5 sections (against 90,000 Btuh across 4) and its Saf-T flue allowance steps down a band sooner: 40/35/30 ft by elevation versus 40/40/35 ft on the 90.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Slant/Fin VSPH-90 | Slant/Fin VSPH-120 |
|---|---|---|
| Input | 90 MBH | 120 MBH |
| Cast-iron sections | 4 | 5 |
| Venting | Direct vent, sealed combustion — mechanically induced draft, positive-pressure flue: 3" diameter UL-listed AL29-4C stainless steel only (Heat-Fab Saf-T Vent / Saf-T EZ Seal, ProTech FasNSeal, Flex-L StaR-34 or Z-Flex Z-Vent); NO PVC/plastic or galvanized flue; no vent damper; common venting not allowed | Direct vent, sealed combustion — mechanically induced draft, positive-pressure flue: 3" diameter UL-listed AL29-4C stainless steel only (Heat-Fab Saf-T Vent / Saf-T EZ Seal, ProTech FasNSeal, Flex-L StaR-34 or Z-Flex Z-Vent); NO PVC/plastic or galvanized flue; no vent damper; common venting not allowed |
| Max. flue equivalent length (Heat-Fab Saf-T / EZ Seal) | 40 ft (0–7,500 ft) / 35 ft (7,500–10,000 ft) | 40 ft (0–5,000 ft) / 35 ft (5,000–7,500 ft) / 30 ft (7,500–10,000 ft) |
| Fuel | Natural gas or propane | Natural gas or propane |
| Maximum allowable working pressure (MAWP) | 50 psi | 50 psi |
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect water heater (indirect connections supported by the control) | Heating-only boiler — domestic hot water comes from a separate indirect water heater (indirect connections supported by the control) |
Both boilers are cast-iron, NON-condensing, floor-standing direct-vent units of the discontinued VSPH series — mechanically induced draft, positive-pressure flue in 3" UL-listed AL29-4C stainless steel, HydroStat 3000 control, 50 psi ASME MAWP with a 30 psi relief valve, natural gas or field-converted LP.
The VSPH-120 adds 30,000 Btuh of fixed input (120,000 vs 90,000) and a fifth cast-iron section; jacket width (A) grows from 14-1/8" to 17-1/8" and dimension B from 20-3/8" to 23-3/8" per Figure 1.
Its larger fire costs flue length at elevation: on Heat-Fab Saf-T / EZ Seal systems the 120 is allowed 40 ft only to 5,000 ft, then 35 ft (5,000–7,500 ft) and 30 ft (7,500–10,000 ft), while the 90 holds 40 ft to 7,500 ft before dropping to 35 ft. Air intake stays 40 ft on both below 7,500 ft.
Slant/Fin
The Slant/Fin Victory VSPH-90 fires 90,000 Btuh fixed input across 4 cast-iron sections: a discontinued, NON-condensing, floor-standing direct-vent boiler venting in 3" AL29-4C stainless steel to 40 ft of flue below 7,500 ft.
Slant/Fin
The Slant/Fin Victory VSPH-120 fires 120,000 Btuh fixed input across 5 cast-iron sections: a discontinued, NON-condensing, floor-standing direct-vent boiler whose 3" stainless flue steps down from 40 to 30 ft with elevation.
30,000 Btuh of input (120,000 vs 90,000) and one more cast-iron section (5 vs 4); jacket width (A) rises from 14-1/8" to 17-1/8".
The 120 drops to 35 ft above 5,000 ft and 30 ft above 7,500 ft; the 90 holds 40 ft to 7,500 ft and 35 ft above, on Saf-T / EZ Seal systems.
Yes — Slant/Fin lists the whole Victory VSPH line under 'Vintage', and the 2018 heat-exchanger recall notices apply to the series.
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 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.