Sub Zero Mechanical, LLC
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About Sub Zero Mechanical, LLC
Sub Zero Mechanical, LLC is a Granbury-based HVAC contractor operating primarily in Hood County and surrounding North Texas communities. With a perfect 5.0-star rating across 13 verified client reviews, the team has built its reputation on responsive residential service and light commercial installations. Danny Wywias leads the operation, handling service calls personally alongside a small crew of technicians.
What distinguishes Sub Zero Mechanical from neighboring HVAC companies is their documented expertise with LG mini-split systems, a specialization that several reviewers specifically commend. The company handles new installations, routine maintenance, and diagnostic repairs, with past clients noting fair pricing and efficient turnaround even during peak summer demand periods.
Reviewers consistently highlight Danny's willingness to respond quickly to heating and cooling emergencies. One customer noted the team rescued their home during the July 4th holiday weekend when their system failed. Another described Danny arriving the same morning to diagnose and repair a cooling issue before afternoon temperatures peaked. Multiple five-star reviews cite honesty, reliability, and thoroughness as characteristics that earn repeat business.
What Customers Say
Eight reviewers awarded flawless five-star ratings, with three explicitly mentioning same-day or urgent arrival during heat-related emergencies. Danny, the lead technician, receives named recognition in six of eight testimonials for his knowledge, fairness, and professional approach.
Working Hours
| Sunday | Closed |
| MondayToday | 8 AM–5 PM |
| Tuesday | 8 AM–5 PM |
| Wednesday | 8 AM–5 PM |
| Thursday | 8 AM–5 PM |
| Friday | 8 AM–5 PM |
| Saturday | 8 AM–12 PM |
Services
Mini-Split System Installation
Installation of ductless mini-split systems for whole-home zones, workshops, andadd-on spaces including integration with mobile apps for temperature control.
AC Repair & Diagnostics
Same-day diagnosis and repair of cooling system failures, capacitor replacements, refrigerant recharges, and electrical troubleshooting.
Heating System Repair
Repair and troubleshooting of heat pump and heating components, particularly during winter or cold-spell emergencies.
Preventive Maintenance
Seasonal tune-ups and filter changes designed to extend system lifespan and maintain efficiency before peak demand periods.
System Replacement Consultation
Evaluation of existing HVAC equipment for replacement recommendations, with fair pricing guidance for homeowners.