Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The VSPH-150 and VSPH-180 are the two largest Victory VSPH boilers — discontinued NON-condensing cast-iron direct-vent units on identical 3" AL29-4C stainless venting at 50 psi ASME MAWP. The 180 fires 180,000 Btuh across 7 sections against the 150's 150,000 Btuh across 6, and carries the shortest flue allowances of the series: 33/28/23 ft versus 35/30/25 ft by elevation on Saf-T systems.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Slant/Fin VSPH-150 | Slant/Fin VSPH-180 |
|---|---|---|
| Input | 150 MBH | 180 MBH |
| Cast-iron sections | 6 | 7 |
| 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) | 35 ft (0–5,000 ft) / 30 ft (5,000–7,500 ft) / 25 ft (7,500–10,000 ft) | 33 ft (0–5,000 ft) / 28 ft (5,000–7,500 ft) / 23 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 are cast-iron, NON-condensing, floor-standing direct-vent boilers of the discontinued VSPH series, mechanically induced draft with positive-pressure flues in 3" UL-listed AL29-4C stainless steel, HydroStat 3000 control, 50 psi ASME MAWP with a 30 psi relief valve.
The VSPH-180 tops the line at 180,000 Btuh fixed input across 7 cast-iron sections, against the VSPH-150's 150,000 Btuh across 6; jacket width (A) grows from 20-1/8" to 23-1/8" and dimension B from 26-3/8" to 29-3/8" per Figure 1.
As the largest size the 180 prints the shortest flue limits in the series: 33 ft below 5,000 ft, 28 ft at 5,000–7,500 ft and 23 ft at 7,500–10,000 ft on Heat-Fab Saf-T / EZ Seal systems, against the 150's 35/30/25 ft. Air intake also steps down on the 180 — 40 ft below 5,000 ft, 35 ft at 5,000–7,500 ft and 30 ft at 7,500–10,000 ft — where the 150 keeps 40 ft to 7,500 ft before dropping to 35 ft.
Slant/Fin
The Slant/Fin Victory VSPH-150 fires 150,000 Btuh fixed input across 6 cast-iron sections: a discontinued, NON-condensing, floor-standing direct-vent boiler whose 3" stainless flue maxes at 35 ft below 5,000 ft.
Slant/Fin
The Slant/Fin Victory VSPH-180 is the largest VSPH: 180,000 Btuh fixed input across 7 cast-iron sections in a discontinued, NON-condensing, floor-standing direct-vent boiler with the tightest flue allowance of the series (33 ft below 5,000 ft on Saf-T systems).
The VSPH-180: 180,000 Btuh fixed input across 7 cast-iron sections, with jacket width (A) of 23-1/8".
The 150 is allowed 35/30/25 ft and the 180 only 33/28/23 ft by elevation band on Saf-T / EZ Seal systems — the shortest allowances in the series.
No — the Victory VSPH is discontinued ('Vintage' on Slant/Fin's library) and subject to 2018 heat-exchanger recall notices.
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.