About Dao Nguyen
Dao Nguyen is a senior technician and one of the lead technical authorities at Cool Aid Air Conditioning and Refrigeration. Working alongside owner Jim McKinny, Dao helps carry the company's standard of doing the job right into the field every day across the San Francisco Bay Area.
Much of Dao's work is on the commercial side — keeping walk-in coolers, reach-in units, ice machines, and rooftop HVAC systems running for the restaurants, hotels, and businesses that can't afford downtime.
Areas of focus
- Commercial refrigeration — walk-in coolers, reach-in units, and ice machines
- Commercial HVAC repair and maintenance
- Emergency refrigeration service for food & beverage businesses
- Diagnostics on modern low-GWP refrigerant systems (R-32, R-454B, R-290)
Credentials & training
- EPA Universal Certification (Section 608)
- Ongoing manufacturer / factory training
- Backed by Cool Aid's C-20 & C-38 contractor licensing
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