The best Halloween fog machines, ranked on output against the circuit they share

How we ranked these

Published output first, because it is what you are buying. Then circuit friendliness, because a machine that trips the breaker produces no fog at all. Then tank size, remote and how completely the listing documents itself. Amp figures are our arithmetic from the published wattage at 120 V; nothing here was measured by us.

The circuit arithmetic, before anything else

This site uses one rule for every continuous load: keep it at or under 80 percent of the circuit rating. On an ordinary 15 A household circuit that is 12 A, or 1,440 W, and a Halloween display is a continuous load for five or six hours a night.

The practical consequence: if you want the big fog, find the big fog its own outlet on a separate breaker. The method for working out which outlets share a breaker, and what else is on them, is on Halloween yard display power, and the rule itself on how many amps.

Output claims, and how far to trust them

CFM — cubic feet per minute — is the only output figure this category publishes, and it is a manufacturer claim with no shared test behind it. Compare it within a wattage class rather than across brands with any precision.

What the numbers do tell you is the class. The 400 W machines publish around 2,000 CFM; the 1,000 W machines publish around 5,000. That two-and-a-half-times difference is real and visible: a 400 W machine makes a patch of fog around a feature, and a 1,000 W machine makes a yard of it. On a porch, the bigger machine is too much.

Tank size and the length of an evening

One listing publishes its tank: the BORGOVA holds a liter. Nothing else on this page states a fluid capacity at all, which is the gap to plan around rather than a figure to compare.

The fluid, which is the second purchase

Every machine here is water based, and the fluid you put in it decides the density, how long the fog hangs, and whether it stays at ankle height. The fluids with a published machine wattage range, the one with a published hang time, and the reason low-lying fluid does not stay low without a chiller are on Halloween fog fluid.

Chilling is a different machine rather than a different fluid. Every fogger on this page sends its output upward; the class that keeps fog at ankle height runs at 1,200 to 3,500 W and needs the circuit planned before it is bought. Those are ranked on published wattage, coverage and tank on low-lying fog machines and fog chillers.

Fog goes where the wind goes

Outdoors, fog is a weather problem. On a still night it pools in low ground and hangs around a feature; with any breeze at all it streams sideways and disappears. Put the machine upwind of what you want to shroud, not beside it.

The other physical fact worth knowing: heated fog rises as it leaves the nozzle. Fog that hugs the ground needs chilling, which is a different kind of machine, and none of the five here claim to do it. What these make is a haze at head height that settles as it cools.

Fog is what makes light visible

On its own, fog in the dark is invisible. Put a light through it and every beam becomes a solid object — which is why a fog machine is the cheapest upgrade to a display that already has a spotlight or a projector.

Aim a colored light across the fog rather than into it, and keep the light low. The method is on Halloween display lighting, and the projector choice on Halloween projectors. Fog around a graveyard of foam tombstones is the classic pairing for a reason.

The remote, and who is holding it

A 15 ft wired remote means standing within 15 ft of the machine. That is fine if the machine sits by the door; it is useless if the machine is out in the yard. The VIRFUN publishes a wireless range of up to 45 ft, which is the difference between firing it from behind the front door and firing it from a bush.

The BORGOVA’s timer is the other answer: bursts on a schedule, nobody holding anything. That is the right mode for a display that runs all evening; on-demand is the right mode for timing fog to someone arriving.

Rain, cords and where the machine sits

None of the five publishes a weather rating. That puts every one of them under cover — on a porch, under an overhang, or inside a ventilated box — and never directly on wet ground. Plug into a GFCI outlet on an outdoor-rated cord, and keep the connection off the grass. The general rules are on outdoor light safety and extension cords.

Indoors, fog from these machines can set off some smoke alarms. Keep it well away from detectors, or keep it outside where it belongs.

Putting it away in November

Store the machine empty, upright and dry, with the remote bagged and taped to it, and the fluid in a sealed bottle rather than in the tank. Then it goes in with the rest of the season — Halloween decoration storage covers the awkward shapes this one sits beside.