How Often Should I Have My Air Ducts Inspected and Sealed?
Most homes should have their air ducts inspected every 3–5 years, and sealed if leakage exceeds typical thresholds. Newer or recently sealed…
Read AnswerFrequently Asked Questions
Straight answers to the questions our customers ask most — covering plumbing, heating, cooling, and electrical service across our service area.
Will Sealing My Air Ducts Help Reduce My Energy Bills?
Yes — sealing your air ducts almost always reduces energy bills, often by 10–30% on heating and cooling. Typical residential duct systems…
Read AnswerCan Duct Sealing Help Improve My Homes Indoor Air Quality?
Yes — duct sealing has a big impact on indoor air quality. Leaky ducts pull dust, attic insulation, crawlspace humidity, and even…
Read AnswerWhat Is the Process for Sealing Air Ducts and How Long Does It Typically Take?
The duct-sealing process starts with a pre-test of duct leakage, then either hand sealing accessible joints with mastic or Aeroseal injection for…
Read AnswerHow Can I Tell If My Air Ducts Need to Be Sealed?
The clearest signs your air ducts need sealing are uneven temperatures from room to room, dusty registers and surrounding surfaces, high humidity…
Read AnswerWhat Are the Benefits of Professional Duct Sealing for My Home?
Professional duct sealing reduces energy bills, fixes uneven room temperatures, lowers dust and allergens, extends HVAC equipment life, and improves indoor air…
Read AnswerCan Mainstream Also Clean and Seal My Air Ducts?
Yes — Mainstream cleans, inspects, and seals air ducts as a single, coordinated service. We typically clean first to remove dust and…
Read AnswerHow Much Is an Air Duct Inspection?
A standard residential air duct inspection in the Spokane area costs $99 to $249, depending on home size and whether duct-leakage testing…
Read AnswerWhat Do I Get From an Air Duct Inspection by Mainstream?
An air duct inspection from Mainstream gives you a full visual and measured assessment of your duct system — including a written…
Read AnswerHow Do You Inspect Air Ducts?
We inspect air ducts using a combination of direct visual review of accessible runs, video-camera scopes for hidden sections, infrared scanning for…
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