Why we often recommend replacing contaminated ductwork instead of cleaning it.
Irvine's newer duct-board era construction is exactly the porous material that can't be cleaned once contaminated — replacement with sealed new runs is the honest fix we recommend here.
Inland micro-climates within Irvine can swing 10+ degrees between the coast-adjacent and Orange County Great Park areas, which affects load calculations for new installs.
See our full Duct Replacement (Not Just Cleaning) service page, or browse all HVAC services in Irvine.