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 MODU-FIRE FD N1500 and N2000 share the same 54" × 32" × 68" shipping box, 985 lb operating weight, 7.3-gallon water content, 206 sq. ft. heated surface and 2-1/2" water connections; the N2000 adds 500 MBH of input and 425 MBH of output, steps gas up from 1-1/4" to 1-1/2", ships 30 lb heavier and moves 170 GPM at 20°F ΔT versus 127.5 GPM.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | P-K MODU-FIRE FD N1500 | P-K MODU-FIRE FD N2000 |
|---|---|---|
| Input | 1,500 MBH | 2,000 MBH |
| Output | 1,275 MBH | 1,700 MBH |
| Efficiency (page) | 88 % | 88 % |
| Turndown ratio | 5:1 | 5:1 |
| Main gas connection | 1 1/4" 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 | 38 | 50.8 |
| Heated wet surface area | 206 sq. ft. | 206 sq. ft. |
| Flow rate @ 20°F ΔT | 127.5 GPM | 170 GPM |
| Combustion air inlet | 8" dia. stub | 8" dia. stub |
| Exhaust vent | 8" (6" with adapter) | 8" (6" with adapter) |
| Shipping width | 32 in | 32 in |
| Shipping length | 54 in | 54 in |
| Shipping height | 68 in | 68 in |
P-K's submittal prints the N1500MFD at 1,500,000 BTU/hr input / 1,275,000 BTU/hr output and the N2000MFD at 2,000,000 / 1,700,000, both at 38.0 and 50.8 boiler HP respectively. The submittal does not print a minimum-input or turndown row for these two sizes; the 5:1 turndown is the series figure on the product page.
The package is shared: 54" × 32" × 68" shipping dimensions, 985 lb operating weight, 7.3 gallons of water, 206 sq. ft. heated surface, 2-1/2" NPT supply/return, an 8" combustion-air stub and an 8" exhaust (6" with adapter).
Two things change: the main gas connection steps from 1-1/4" to 1-1/2" NPT, and the flow rate at a 20°F ΔT rises from 127.5 to 170 GPM. Shipping weight goes from 960 lb to 990 lb. Both require Category II or IV venting.
Patterson-Kelley
The P-K MODU-FIRE FD N1500 is a forced-draft non-condensing commercial boiler rated 1500 MBH input and 1275 MBH output in Patterson-Kelley's published submittal, with 5:1 turndown and a 985 lb operating weight.
Patterson-Kelley
The P-K MODU-FIRE FD N2000 is a forced-draft non-condensing commercial boiler rated 2000 MBH input and 1700 MBH output in Patterson-Kelley's published submittal, with 5:1 turndown and a 985 lb operating weight.
1-1/4" NPT-F on the N1500MFD and 1-1/2" NPT-F on the N2000MFD, per the submittal.
No — the N1500/N2000 submittal prints input, output and design data but no minimum-input or turndown row; the 5:1 figure is the series claim on the product page.
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.