Ductwork · Duct Cleaning · IAQ · Hoods · Fans · MAU · Swamp Coolers
Serving Riverside & San Bernardino County. Ductwork, duct cleaning, indoor air quality, commercial kitchen hoods, exhaust fans, make-up air units, and evaporative coolers — by licensed Inland Empire techs.
Half of every comfort problem we diagnose isn't the AC or furnace — it's the duct system, the filter cabinet, or the ventilation that feeds it. A perfectly tuned 16-SEER condenser can't fix a leaky trunk that loses 30% of its conditioned air into the attic, and a $4,000 air purifier doesn't help if the return-air drop pulls dirty attic air past it. Tech On Call covers the full air path — ductwork, duct cleaning, indoor air quality, and commercial kitchen exhaust.
Most Inland Empire homes were built with R-4 flex duct sized by rule-of-thumb, not Manual D. The result: undersized returns, oversized supplies, leaky boots at every register, and one bedroom that's always 6° off from the rest of the house. We measure static pressure and CFM at every register before quoting any duct work — so the fix is the actual fix, not a guess. For high-dust High Desert homes (Hesperia, Victorville, Apple Valley, Yucca Valley) we add MERV-13 media cabinets and recommend duct cleaning intervals tied to filter restriction, not the calendar.
Commercial work is its own world. Restaurant exhaust hoods (Type I grease, Type II steam) require balanced make-up air or the back door slams, customers feel a draft, and the hood fails capture testing. We service hoods, upblast fans, and make-up air units across the Inland Empire, and coordinate NFPA 96 cleaning intervals with certified partners. And for the High Desert, we still service and replace evaporative (swamp) coolers — when humidity is below 30%, they cost 70% less to run than refrigerated AC.
New duct design, replacement, and repair — Manual D sizing, sealed seams, R-8 insulation, balanced airflow that your old leaky trunk line never delivered.
Whole-home and commercial air duct cleaning — rotating brush + HEPA negative-air vacuum, with a borescope inspection before and after so you actually see the difference.
MERV-13 media filtration, UV-C coil lights, whole-home dehumidifiers, fresh-air ERVs — the right IAQ stack for your home, not a sales pitch.
Trunk and branch replacement, return-air upgrades, R-8 insulated flex, and balanced register layouts.
Rotating brush plus HEPA vacuum with borescope before/after photos. Whole-home and zone packages.
MERV-13 media, UV-C, dehumidifiers, ERVs, and smart IAQ monitoring for asthma/allergy homes.
Type I grease hoods and Type II steam/heat hoods — repair, replacement, and NFPA 96 coordination.
Upblast roof fans, inline fans, bath fans — motor replacement, belts, bearings, capacitors.
Commercial MAU repair and replacement — balancing supply to exhaust so the back door doesn't slam.
High Desert favorite — pad changes, motor swaps, pump repair, and complete replacements.
One bedroom is 78° while the rest of the house is 72°? Usually undersized returns, leaky ducts, or a missing branch. We measure and rebalance.
Filters clog in 30 days? Visible dust on registers? Usually duct leaks pulling attic dust plus undersized filtration. We diagnose both.
Hood capture failing? Make-up air unbalanced? Back door slamming? We service Type I/II hoods, fans, and MAU systems.
Tract homes, custom builds, and older ranch homes with attic ductwork — every footprint we work in the Inland Empire.
Type I/II hoods, upblast fans, and make-up air units sized to your cookline and balanced to code.
Hesperia, Victorville, Apple Valley and Yucca Valley — heavy dust loads, evaporative coolers, and dry-air IAQ challenges.
Same-day diagnostics across both counties. Talk to a real dispatcher — (909) 239-6364.
