How many watts does a Christmas inflatable use?

Short answer: the figure is printed on the unit or its packaging, and it is smaller than people expect — an inflatable blower is a small fan, not a motor. Several inflatables usually sit comfortably on one circuit alongside a full LED roofline. Find your own numbers rather than working from an average.

We are not publishing typical wattages here. Draw varies with unit size, blower capacity and how many internal LEDs are fitted, and a made-up average would be worse than the figure printed on the product in front of you.

Where to find the number

1. A label on the blower housing. Most units carry the electrical rating there.
2. A tag on the cord, near the plug.
3. The box or the manual, if you still have either.
4. The manufacturer's listing for that exact model.
5. Measure it. A plug-in energy meter gives you the real figure for your actual unit in a minute, and it is the most reliable option for an older inflatable whose labels have worn off.

Two components draw power

The operative word is continuously. Unlike a light set that simply sits there, the fan is a motor doing work every second the unit is inflated. That does not make it a big load, but it does mean its draw is constant rather than variable.

Fitting them on the circuit

Use the standard budget: a 15-amp circuit gives you 1,440 watts under the 80 percent continuous-load convention. Add the inflatables' wattage to the lights and everything else on that breaker, and compare.

In practice, an all-LED display with two or three inflatables usually sits comfortably inside that. Run your own figures in the power and wattage calculator, and see how many lights on one circuit for the full arithmetic.

Running cost

Use the same formula as everything else: watts ÷ 1,000 × hours × nights × your rate per kWh. Because the blower runs whenever the unit is up, the hours figure for an inflatable is exactly its on-time — there is no standby.

For most displays the inflatables are not the dominant line, and shortening their schedule by a couple of hours a night is an easy saving that nobody notices. The full method is in cost to run Christmas lights.

Voltage drop, which affects blowers more than lights

One genuinely inflatable-specific issue. A long run of thin extension cord delivers less than 120 volts at the far end, and motors are more sensitive to that than LEDs are. An LED string on a sagging supply is slightly dimmer; a blower on a sagging supply runs slower, and a blower running slower may not hold the unit fully inflated.

If an inflatable at the far end of a long cord run stands up limply while the same unit near the house stands up properly, this is almost certainly why. The fix is a heavier-gauge cord for the trunk run — see best outdoor extension cords.