Practical schedule: Test when you move in if unknown; retest every 2 years as a baseline habit; retest after mitigation (verification), after finishing a basement, after major HVAC or foundation work, and when buying/selling.
After mitigation
Complete a short-term verification test per protocol once the system has run long enough. Retest at least every two years afterward—or sooner if the manometer shows loss of pressure or the fan sounds different.
Life events that reset the clock
- Basement finishing or weatherization projects
- New HVAC equipment or duct changes
- Foundation repairs, new sump, or crawl encapsulation
- Extended vacancy then re-occupancy
Seasonal curiosity
If you only ever tested in mild weather, a winter short-term test can be informative in the Black Hills. See winter vs summer testing.
Need a local next step? Call (605) 600-6282 to talk through testing, real estate timing, or mitigation for your Rapid City–area home.