Short-Term vs. Long-Term Radon Testing
The Gold Standard:
Long-Term Testing
Health Canada states: "A minimum of 3 months is recommended." [Guide for Dwellings | PDF], [Guide for Buildings | PDF]. The most accurate testing period is during the Canadian heating season (October–April) when windows are closed and the stack effect—warm air escaping upward—is strongest, potentially drawing more radon in.
Health Canada Recommendation: "Health Canada recommends that the radon test performed in a home be a long-term measurement, ideally conducted during the heating season." [Guide for...Dwellings | PDF]
Why October Through April Is Considered Optimal
- • Homes are generally more airtight.
• Windows remain closed longer.
• Warm indoor air rises and escapes upward.
• The stack effect increases significantly.
• Soil-to-home pressure differences rise.
• Indoor radon levels are typically at their peak.
But Don’t Wait To Start Testing
Don’t delay your safety for winter seasons. Gather initial data today to answer “Do I have any radon?” and see how your home behaves year-round. Our packages provide immediate screening followed by comprehensive long-term testing in multiple living areas during the optimal heating season for the most accurate health profile.
The Value of Short-Term Testing
Provides an immediate radon snapshot. For real estate, we utilize 2–3 day tests to satisfy contract requirements, but Radon Hound uniquely includes long-term testing in every package after move-in to track your home's true behavior throughout the rest of the year.
HOUND FACT: A high short-term result indicates high radon potential, but a low result doesn’t guarantee health safety. Always confirm short-term snapshots with long-term testing before making final mitigation decisions.
Radon Hound’s Informed Approach
- Test Now: Start understanding your home’s behavior today.
- Learn More: Identify risk profiles and foundation differences.
- Verify: Confirm all findings with seasonal long-term testing.
- Decide: Make informed decisions for a healthier home environment.
Important: "A single short-term measurement is not a sufficient basis for a decision to mitigate." Health Canada is clear that short-term results fluctuate; they should never be the sole factor in remediation. Any short-term test must be followed by a long-term measurement for accuracy.
The Healthy House Perspective: Testing is not about creating urgency—it's about building understanding. The best time to start learning about your home's radon level is today. We don't start with the fan; we start by understanding the house.
