Expert Ductwork Services

Leaky or poorly designed ductwork can quietly drain efficiency from an otherwise healthy HVAC system. Our team inspects, seals, repairs, and installs ductwork throughout Monrovia homes to fix uneven airflow and reduce wasted energy.

Signs Your Monrovia Home Has Duct Problems

  • High Electric Bills: If your SCE bill seems disproportionate to your usage, duct leakage is one of the first things we check.
  • Hot Upstairs Bedrooms: Rooms far from the air handler that never get cool enough are often suffering from undersized or leaking duct runs.
  • Visible Disconnected Ducts: In attic or crawlspace inspections, we frequently find flex duct that has simply fallen off its collar connection — blowing all your AC into the attic.
  • Pest-Damaged Flexible Duct: Rodents in Monrovia's foothill attics routinely chew through flex duct. A single breached duct run can eliminate 25% of your airflow.
  • Dusty Home Despite New Filters: When return air ducts leak in a dirty attic, they pull attic dust and insulation fibers directly into your air stream.

Comprehensive Ductwork Services

We provide the full range of ductwork services — from a simple mastic sealant application on accessible joints all the way to a complete duct system tear-out and replacement with new insulated flex duct and properly sealed metal plenums. We also offer Aeroseal duct sealing, an innovative process that pumps a polymer sealant through your duct system that bonds to and seals leaks from the inside.

Our Ductwork Inspection and Repair Process

We approach every ductwork project systematically:

  • 1. Duct Leakage Testing: We use a blower door or duct blaster test to quantify exactly how much air your system is losing — so we can measure the improvement after our work.
  • 2. Attic or Crawlspace Inspection: We physically inspect every duct run for disconnections, tears, crimps, and inadequate insulation.
  • 3. Mastic Sealing or Aeroseal: Accessible joints are sealed with professional mastic compound. For inaccessible areas, Aeroseal reaches leaks our hands can't.
  • 4. Damaged Duct Replacement: Sections crushed by roof trusses, shredded by pests, or collapsed with age are replaced with new insulated flex duct.
  • 5. Final Airflow Balancing: We measure supply air at each register and adjust dampers to deliver balanced airflow to every room.

Why Choose Monrovia HVAC?

Duct sealing is one of the highest-ROI home improvement projects available to Monrovia homeowners. Most customers see energy savings that recover the investment within 2-3 years.

Call us today at (626) 423-6510 to schedule your service.