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Claim This BusinessHay Cool HVAC operates out of Glendale under California CSLB license #1101079, a C20 classification that authorizes both heating and cooling work. Seven years in business have produced a perfect 5-star average across 8 client reviews, each posted by name. The company serves Glendale and Los Angeles, taking on projects for homeowners and business owners alike. Round-the-clock availability means a broken furnace on Christmas Eve or a dead AC unit during an August heat wave gets the same response as a scheduled tune-up. New clients receive 25 percent off their first invoice.
What separates this crew from the dozens of HVAC shops Glendale is their emphasis on ventilation and air quality alongside conventional installation and repair work. Rather than simply swapping out a condensing unit, they assess airflow and circulation as part of the scope, a detail that shows up repeatedly in reviews where technicians walked homeowners through filter replacement and system upkeep after the primary fix was complete. The company posts an ongoing 25 percent first-order discount that makes initial service calls accessible for clients uncertain about committing to a maintenance contract.
All 8 reviewers awarded 5 stars, with speed and affordability surfacing in every testimonial. Reviewers describe fast arrivals, same-day fixes during extreme heat, and prices described as reasonable relative to the market. Three reviews mention technicians teaching proper filter care after completing repairs, a detail that suggests the team treats follow-up education as standard practice rather than optional.
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Full installation and troubleshooting for residential and commercial AC units, covering split systems, packaged units, and ductless setups.
Installation of furnaces, heat pumps, and boilers tailored to property size and Glendale climate demands.
Design and installation of airflow systems that improve indoor air quality and maintain consistent circulation throughout a building.
Diagnostic and repair services for cooling failures, including refrigerant issues, compressor problems, and airflow restrictions.
Seasonal tune-ups, filter replacement, coil cleaning, and performance checks to extend equipment life and reduce emergency calls.
Reprogramming and replacement of thermostats to ensure accurate temperature sensing and system cycling.