The short answer: for a home with moderate contents, plan 5 gallons per 1,000 sq ft to fog and clean contents, or 1 gallon per 1,000 sq ft for fogging alone. Products ship full strength, so there is no dilution step. Droplet size is the variable most crews get wrong — too fine and it hangs in the air instead of settling, too coarse and it wets surfaces unevenly.
The coverage numbers
| Scenario | Rate | 2,000 sq ft home |
|---|---|---|
| Fogging + cleaning contents | 5 gal / 1,000 sq ft | ~10 gallons |
| Fogging only | 1 gal / 1,000 sq ft | ~2 gallons |
| Crawlspace or attic (low content) | ~1 gal / 1,000 sq ft | varies |
| HVAC coils + duct fogging | 1 gal per home ≤2,000 sq ft | ~1 gallon |
These are approximate and move with substrate, contents density and delivery method. A heavily furnished house consumes more than an empty one, and porous substrates absorb more than sealed ones. Quote with a contingency rather than to the gallon.
Droplet size
This is the setting that separates a good fogging result from a mediocre one.
Too fine and droplets stay suspended, drift on air currents and get pulled into returns rather than settling on the surfaces you are treating. You use product and treat the air.
Too coarse and it behaves like a sprayer — wetting near surfaces heavily, reaching nothing at distance, and running on vertical faces.
An adjustable valve is what lets you tune this per room. The Commander Tri-Jet has one, plus a tornado-action nozzle that projects up to 30 feet, which meaningfully reduces the number of setups in a large space.
Setups per room
Fewer setups is faster and produces more even coverage. Two things help.
Throw. A fogger reaching 30 feet in multiple directions covers most residential rooms from one placement.
Rotation. A rotating turntable and stand at 2 RPM turns one placement into 360-degree distribution and lets the crew leave the room while it runs. On contents-heavy jobs this is the difference between one setup and four, and it is usually where the equipment pays for itself.
The combo pack bundles both.
Sequence on site
- Removal work complete and containment still up.
- HEPA vacuum first. Fogging over loose debris wastes product and fixes material in place.
- Close returns and shut the HVAC down unless you are deliberately fogging the ducts. Otherwise the system pulls your fog straight out of the room.
- Work from the far end toward the exit. Obvious, and still done backwards regularly.
- Treat contents as well as surfaces. This is what fogging is for — the tops of cabinets, the backs of furniture, inside soft goods.
- Allow dwell and drying time before the space is disturbed.
- HVAC separately, with a coil and duct product.
Electrostatic sprayers
The alternative for hard surfaces. Charged droplets adhere better to vertical faces and wrap around objects, which gives better coverage per surface at slower area coverage. Most crews running volume end up with both: a fogger for whole-room and contents, a sprayer for detailed hard-surface work.
Buying in bulk
At 10 gallons per average residential job, drum pricing changes your material cost materially. 55-gallon drums and 2.5-gallon ready-to-use containers are available, with dealer pricing on enquiry. If you are running more than a couple of jobs a month, the drum is the obvious move.
Common questions
How much product does fogging a house take?
5 gallons per 1,000 sq ft for fogging plus contents; 1 gallon per 1,000 sq ft for fogging alone.
Do I need to dilute it?
No. Products ship full strength and are ready to use, which removes a step where mistakes happen at scale.
Should the HVAC run during fogging?
No, unless you are intentionally fogging the ductwork. A running system pulls fog out of the space.
Fogger or electrostatic sprayer?
Fogger for whole-room and contents coverage, sprayer for detailed hard-surface work. Crews running volume typically use both.
