Answer
Can the Westinghouse WGen9500DF run ResMed AirSense 11, typical power from the user guide?
Runs, surge risk
Runs. Running draw 56 W fits within 9,500 running watts, and published startup 73 W fits within 12,500 starting watts. This is an open-frame generator with THD under 23%; for sensitive electronics or medical devices an inverter generator (under 3% THD) is the safer choice.
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The comparison
| Westinghouse WGen9500DF | ResMed AirSense 11, typical power from the user guide | |
|---|---|---|
| Running watts | 9,500 W | 56 W |
| Starting / surge watts | 12,500 W | 73 W |
| Type | open-frame, Dual fuel (gasoline/propane) | Medical |
| Published runtime | 12 hr at 25% load on gasoline, 7 hr at 50% on propane | |
| Sources | Generator source | Appliance source |
Questions
Can the Westinghouse WGen9500DF run ResMed AirSense 11, typical power from the user guide?
Runs. Running draw 56 W fits within 9,500 running watts, and published startup 73 W fits within 12,500 starting watts. This is an open-frame generator with THD under 23%; for sensitive electronics or medical devices an inverter generator (under 3% THD) is the safer choice.
What watts were compared?
Generator: 9,500 running W and 12,500 starting W on gasoline. Appliance: 56 W running, 73 W startup.
How long will it run?
Fuel runtime depends on total load. Published runtime: 12 hr at 25% load on gasoline, 7 hr at 50% on propane.
Where did the numbers come from?
Westinghouse spec table: gas 12500 peak / 9500 running; propane 11200 / 8500; L14-30R and 14-50R; 6.6 gal; 12 hr at 25% gas, 7 hr at 50% propane; 74 dBA; 211 lb; THD under 23%. 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.
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