Guaranteed Air Inc.

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About Guaranteed Air Inc.
Guaranteed Air Inc. has earned a near-perfect 4.9-star rating from 99 reviews in Anaheim, California. Established as a family-run residential and light-commercial contractor, the company employs Owner Clase alongside Technician Eric and Office Manager Patty, a trio praised across review platforms for communication and follow-through. The company serves Anaheim directly while extending reach to neighboring communities such as Placentia, Yorba Linda, and Fullerton, Orange County homeowners who value reliability and fair dealing finding their way back year after year. With a decade-track customer base documented in reviews, Guaranteed Air competes against regional giants by betting on consistency instead of volume.
Technicians at Guaranteed Air install equipment from recognizable national manufacturers and stand behind their parts and labor with a published workmanship guarantee. Reviews reference honest diagnosis and fair pricing as recurring themes, suggesting a business model built on trust rather than upsell tactics. This approach shows up in multiple five-star entries where customers specifically note that Clase explained problems clearly, proposed practical fixes, and charged reasonable rates.
Customer stories in public reviews repeatedly name two individuals. Eric earned specific praise for arriving on time, explaining the problem thoroughly, proposing a workable solution, cleaning the workspace completely, and leaving a system running more efficiently than before. Ken LaTourette described an annual service visit where Eric performed a thorough tune-up and left no mess behind. Clase drew consistent recognition for honesty, correct diagnosis, and reasonable pricing from multiple long-term customers including D M, who called him the family's go-to trusted HVAC person and explicitly noted he does not overcharge. A decade-long relationship warmly appreciated by a homeowner who relied on them for a decade.
What Customers Say
Every five-star review identifies either Eric or Clase by name. Eric earns repeat mention for punctual arrivals, thorough explanations, and leaving workspaces immaculate after service. Clase draws consistent praise for honest diagnosis, fair pricing, and refusing to overcharge. One critical review cites a parking dispute with workers, but every positive review praises service quality or technician conduct.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–6 PM |
| Tuesday | 7 AM–6 PM |
| Wednesday | 7 AM–6 PM |
| Thursday | 7 AM–6 PM |
| Friday | 7 AM–6 PM |
| SaturdayToday | Closed |
Services
AC Repair & Maintenance
Diagnoses and repairs cooling failures, performs seasonal tune-ups, and cleans components to restore efficiency and extend system life.
Heating System Repair
Troubleshoots furnaces and heat pumps that fail to warm homes properly, restoring heat before Orange County winter mornings.
Full System Replacement
Removes aging or failed units and installs new HVAC equipment sized and positioned correctly for each residence.
New Installation
Mounts new heating and cooling systems in remodels and new construction projects using manufacturer-approved methods.
Preventive Maintenance Plans
Schedules annual inspections to catch worn parts early, optimize performance, and prevent costly breakdowns during peak seasons.
Thermostat & Controls
Installs and configures programmable and smart thermostats to improve comfort management and reduce energy bills.
Indoor Air Quality Solutions
Recommends and installs filtration, humidity control, and purification accessories tailored to household health concerns.