For a home with moderate contents, we recommend 5 gallons per 1,000 sf. This will allow for fogging and cleaning of contents.  For fogging only, we recommend 1 gallon per 1,000 sf.  Product comes full strength for treatment  (it is not a concentrate). Quantity used can vary with many factors including intended use, substrates, contents, & delivery methods.  These recommendations are approximate and can vary.