Bounce House Blower CFM Calculator

A standard residential bounce house in the 10-13 ft range typically runs on a 1 HP blower producing 350-500 CFM. If the unit is older with single-needle stitching, lean toward the high end of the range to compensate for seam leakage.

If the calculated CFM requirement exceeds 1,500, run dual blowers. This is common on large obstacle courses, multi-chamber interactives, and any commercial unit larger than 25 ft. Multi-chamber units almost always ship with two blower attachments — one per chamber.

Usually yes. A 1.5 HP inflatable blower draws roughly 12 amps at 110V, which fits on a 15A or 20A residential circuit. Problems arise when the customer plugs in additional loads — like a snow-cone machine or a second inflatable — on the same circuit. Always confirm the circuit is dedicated.

Thinner air at higher elevations carries less mass per cubic foot, so the same blower pushes less effective pressure. Above ~3,000 ft, you typically need 5-10% more CFM than the same unit at sea level. Operators in Denver, Salt Lake City, or Albuquerque often size up to the next HP class.

Lock-stitch single-needle seams have the most needle holes per inch and leak the most air. Lock-stitch double-needle is the modern commercial standard. RF-welded vinyl (common on water slides) has the tightest seal and needs about 15% less CFM than equivalent stitched units.

No. Oversizing the blower puts unnecessary strain on the inflatable's seams and pressure-relief vents. Stay inside the manufacturer's recommended CFM range. The calculator's output is a recommended range, not a "more is better" target.