Answer
Can the FIRMAN T07571 Tri Fuel run ResMed AirSense 11, typical power from the user guide?
Runs, surge risk
Runs. Running draw 56 W fits within 7,500 running watts, and published startup 73 W fits within 9,400 starting watts. This is an open-frame generator; for sensitive electronics or medical devices an inverter generator (under 3% THD) is the safer choice.
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The comparison
| FIRMAN T07571 Tri Fuel | ResMed AirSense 11, typical power from the user guide | |
|---|---|---|
| Running watts | 7,500 W | 56 W |
| Starting / surge watts | 9,400 W | 73 W |
| Type | open-frame, Tri fuel (gasoline/propane/natural gas) | Medical |
| Published runtime | Up to 12 hr at 25% load | |
| Sources | Generator source | Appliance source |
Questions
Can the FIRMAN T07571 Tri Fuel run ResMed AirSense 11, typical power from the user guide?
Runs. Running draw 56 W fits within 7,500 running watts, and published startup 73 W fits within 9,400 starting watts. This is an open-frame generator; for sensitive electronics or medical devices an inverter generator (under 3% THD) is the safer choice.
What watts were compared?
Generator: 7,500 running W and 9,400 starting W on gasoline. Appliance: 56 W running, 73 W startup.
How long will it run?
Fuel runtime depends on total load. Published runtime: Up to 12 hr at 25% load.
Where did the numbers come from?
FIRMAN spec card: gasoline 9400 / 7500; LPG 8450 / 6750; natural gas 6900 / 5500; L14-30R, 14-50R, L5-30R, 5-20R GFCI; 8 gal; up to 12 hr at 25%. Americas user guide, 65 W power supply section: typical power consumption 56.1 W (111.5 VA) and peak power consumption 73.2 W (137.6 VA). This is the published system figure, not the lower no-humidifier row on ResMed's separate therapy-power sheet.
Safety first
- Run a generator outdoors only, at least 20 feet from the house, with the exhaust pointed away from doors, windows and vents. Never in a garage, basement, shed or crawlspace, even with the door open.
- Carbon monoxide is odorless and can kill in minutes. Keep battery CO alarms working inside the home.
- Never backfeed a house by plugging a generator into a wall outlet or dryer receptacle. It can energize utility lines and kill a lineworker or a neighbor.
- Connecting to home wiring requires a transfer switch or a listed breaker interlock with a power inlet box, installed by a licensed electrician and permitted where your jurisdiction requires it.