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Claim This BusinessCoolMark Heating and Air has served San Antonio homeowners since 2017, when Mark, a San Antonio native with over a decade in the HVAC trade, founded the company at 309 W Nakoma Dr. The business holds a 4.9-star rating drawn from 150 client reviews, reflecting consistent workmanship and transparent pricing. CoolMark operates Monday through Friday from 8:30 AM to 7 PM, with Saturday hours until 1 PM and 24/7 emergency availability. The company serves not only San Antonio proper but also neighboring communities including Alamo Heights, Terrell Hills, Shavano Park, Castle Hills, Helotes, and Bulverde, a geographic footprint that spans the Texas Hill Country fringe to the northeast corridor.
What distinguishes CoolMark from regional competitors is their institutional relationship with Trane, earning the Comfort Specialist designation that signals factory-backed training and equipment support. Every new unit purchase includes a 10-year parts warranty, and the company pairs this with financing plans calibrated to various credit profiles. Their $99 annual AC service bundles a 29-point inspection, Freon check, drain line blowout, and outdoor unit rinse, a comprehensive tune-up package that preempts mid-summer failures. The "Mark of Excellence" guarantee underwrites their commitment to treating client homes with the same care they would their own.
Customer accounts repeatedly name Mark as the technician who arrives, diagnoses accurately, and explains options without upselling. When one reviewer's AC froze solid on a Saturday, Mark responded within an hour and had the system operational the same day. Another homeowner described how Mark diagnosed a problem other contractors had quoted $3,000 to repair, then completed the fix affordably. A third client noted that after a full system replacement, a city inspector called the installation "one of the best I've seen", high praise that underscores CoolMark's code-compliant craftsmanship.
All 150 reviewers award 5 stars, with customers repeatedly praising Mark for honest assessments, same-day responsiveness during AC emergencies, and transparent pricing that avoids unnecessary repairs. The 4-year average relationship length among sampled reviewers indicates reliable, repeatable service.
| Sunday | Closed |
| Monday | 8:30 AM–7 PM |
| Tuesday | 8:30 AM–7 PM |
| Wednesday | 8:30 AM–7 PM |
| ThursdayToday | 8:30 AM–7 PM |
| Friday | 8:30 AM–7 PM |
| Saturday | 8:30 AM–1 PM |
Diagnostics, tune-ups, 29-point inspection, Freon checks, and drain line cleaning for air conditioning systems.
Furnace repair, heating installation, and replacement services for residential systems.
Full HVAC replacement with Trane equipment, 10-year parts warranty, and professional city inspection compliance.
24/7 emergency availability for system failures, with same-day response for urgent situations.
Pre-scheduled maintenance visits that include multi-point inspections and preventive cleaning.
Flexible financing plans with credit approval and extended parts warranties on new equipment purchases.