Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The THERMIFIC VELOX N1700 and N2000 share the same 54" × 32" × 68" shipping box, 985 lb operating weight, 7.3-gallon water content, 206 sq. ft. heated surface, 1-1/2" gas and 2-1/2" water connections; the N2000 adds 300 MBH of input and 255 MBH of output, ships 30 lb heavier and moves 170 GPM at 20°F ΔT versus 144.5 GPM.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | P-K THERMIFIC VELOX N1700 | P-K THERMIFIC VELOX N2000 |
|---|---|---|
| Input | 1,700 MBH | 2,000 MBH |
| Output | 1,445 MBH | 1,700 MBH |
| Efficiency (CSA certified) | 85 % | 85 % |
| Main gas connection | 1 1/2" NPT-F | 1 1/2" NPT-F |
| Boiler supply / return | 2 1/2" NPT (supply F / return M) | 2 1/2" NPT (supply F / return M) |
| Operating weight | 985 lb | 985 lb |
| Shipping weight | 960 lb | 990 lb |
| Boiler water content | 7.3 gal | 7.3 gal |
| Boiler HP | 43.2 | 50.8 |
| Heated wet surface area | 206 sq. ft. | 206 sq. ft. |
| Flow rate @ 20°F ΔT | 144.5 GPM | 170 GPM |
| Combustion air inlet | 8" dia. stub | 8" dia. stub |
| Exhaust vent | 8" | 8" |
| Shipping width | 32 in | 32 in |
| Shipping length | 54 in | 54 in |
| Shipping height | 68 in | 68 in |
P-K's submittal prints the N1700VX at 1,700,000 BTU/hr input / 1,445,000 BTU/hr output (43.2 boiler HP) and the N2000VX at 2,000,000 / 1,700,000 (50.8 boiler HP), the top of the VELOX line.
The package is shared except for shipping weight — 960 lb on the N1700VX against 990 lb on the N2000VX — and the flow rate at a 20°F ΔT, which rises from 144.5 to 170 GPM. Both use 1-1/2" NPT gas and 2-1/2" NPT supply/return connections.
Both are Category I non-condensing appliances at a CSA certified 85% thermal efficiency, using the NURO-series control and requiring only five connections for installation per the product page.
Patterson-Kelley
The P-K THERMIFIC VELOX N1700 is a packaged non-condensing commercial boiler rated 1700 MBH input and 1445 MBH output in Patterson-Kelley's published submittal and a 985 lb operating weight.
Patterson-Kelley
The P-K THERMIFIC VELOX N2000 is a packaged non-condensing commercial boiler rated 2000 MBH input and 1700 MBH output in Patterson-Kelley's published submittal and a 985 lb operating weight.
144.5 GPM for the N1700VX and 170 GPM for the N2000VX at a 20°F ΔT, per the submittal.
Yes — both print a 1-1/2" NPT-F main gas connection.
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 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.