About This Service
Keep your building comfortable year-round with 365 Builders' HVAC services. We install, repair, and maintain central air conditioning, heating systems, ductwork, and ventilation for residential and commercial properties throughout Texas.
HVAC for the Texas Heat
Texas summers are relentless — temperatures regularly exceed 100°F in South Texas and the Rio Grande Valley, pushing air conditioning systems harder than almost anywhere else in the country. Proper HVAC sizing is critical: an undersized system runs constantly and fails prematurely, while an oversized system cycles too quickly and leaves humidity problems. 365 Builders performs Manual J load calculations to size systems correctly, then installs high-efficiency units with proper ductwork design to deliver consistent comfort and lower utility bills.
Commercial HVAC Systems
Commercial HVAC is more complex than residential — it involves rooftop package units, split systems, VAV boxes, exhaust fans, make-up air units, and building automation controls. 365 Builders installs and maintains commercial HVAC systems for office buildings, retail centers, warehouses, medical offices, and government facilities. We coordinate with the building's electrical and controls systems and provide detailed documentation for maintenance records. For our facilities maintenance clients, HVAC service is one of the most frequently requested trades we cover.
Recent HVAC Projects

Edinburg Custom Home Build
Edinburg, TX • 12 months
The home was completed on schedule and $12,000 under the original budget. The homeowners moved in with zero punch list items — everything was right the first time. The property appraised 15% above the construction cost, giving the owners immediate equity.

Pharr Multi-Family Housing Development
Pharr, TX • 8 months
The project was completed in 8 months, one month ahead of the loan draw schedule. Final cost came in 4% under budget. All 8 units were leased within 30 days of receiving the certificate of occupancy. The developer's projected cap rate exceeded 7%, and they've since contracted us for a second phase.
Frequently Asked Questions
What HVAC brands do you install?
We install leading brands including Carrier, Trane, Lennox, and Goodman. We'll recommend the right system based on your building size, efficiency goals, and budget.
Do you offer HVAC maintenance plans?
Yes. Our preventive maintenance plans include seasonal tune-ups, filter changes, and priority service — helping extend equipment life and prevent costly breakdowns.
How much does a new HVAC system cost in Texas?
A standard residential central AC replacement (3–4 ton system) typically costs $5,000–$10,000 installed, including the air handler and condenser. High-efficiency systems and larger homes run more. Commercial HVAC systems are priced based on tonnage and system complexity. Contact 365 Builders for a free load calculation and estimate.
How long does HVAC installation take?
A residential AC replacement is typically a one-day job. New construction HVAC rough-in and installation takes 2–5 days depending on home size and duct layout. Commercial HVAC projects vary from a few days to several weeks for large systems.
What SEER rating should I choose for Texas?
In South Texas, a minimum of 16 SEER2 is recommended for new installations. Higher efficiency ratings (18–20+ SEER2) offer greater long-term savings in areas with very long cooling seasons, like the Rio Grande Valley where AC runs 8–10 months a year. We'll help you find the right balance of upfront cost and long-term savings.