Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Pulse PHW-500 adds 200,000 BTU/hr of input and 170,000 BTU/hr of output over the Pulse PHW-300 on the same Pulse (PHW) platform. The PHW-300 and PHW-500 share the same cabinet and connections — 2 in water, 1 in gas, 3 in air and 4 in exhaust, 1,395 lb dry and 34 gal water — so the 200,000 BTU/hr step needs no piping change.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Fulton Pulse PHW-300 | Fulton Pulse PHW-500 |
|---|---|---|
| Rated input | 300,000 BTU/h | 500,000 BTU/h |
| Rated output | 270,000 BTU/h | 440,000 BTU/h |
| Boiler horsepower (BTS-2000) | 8 | 13 |
| Water connections | 2" NPT | 2" NPT |
| Dry weight | 1,395 lb | 1,395 lb |
| Water volume | 34 gal | 34 gal |
The PHW-300 is rated 300,000 BTU/hr input and 270,000 BTU/hr output with not printed turndown; the PHW-500 is rated 500,000 BTU/hr input and 440,000 BTU/hr output with not printed turndown. Both models carry the same published efficiency column in the official data sheet.
The PHW-300 and PHW-500 share the same cabinet and connections — 2 in water, 1 in gas, 3 in air and 4 in exhaust, 1,395 lb dry and 34 gal water — so the 200,000 BTU/hr step needs no piping change. Flow tables for both sizes are printed in the family data sheet. Dry weight steps from 1,395 lb to 1,395 lb, so rigging and floor loading should be checked against the larger unit.
Both sizes are documented in the same official Fulton data sheet, so the choice is a heat-loss and plant-layout decision: size to the design-day load, then verify connection sizes, venting and weight against the sheet for the exact model.
Fulton
The Fulton Pulse PHW-300 is a gas pulse-combustion commercial hydronic boiler rated 300,000 BTU/hr input and 270,000 BTU/hr output at 8 BHP, documented by Fulton's public PHW product data submittal and I&O manual.
Fulton
The Fulton Pulse PHW-500 is a gas pulse-combustion commercial hydronic boiler rated 500,000 BTU/hr input and 440,000 BTU/hr output at 13 BHP, documented by Fulton's public PHW product data submittal and I&O manual.
Yes — the official PHW submittal prints the same dimensions, connections, 1,395 lb dry weight and 34 gal water content for both sizes.
270,000 BTU/hr for the PHW-300 and 440,000 BTU/hr for the PHW-500 at 120°F in / 140°F out.
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.