Veteran-Owned Heating & Cooling You Can Trust
Transparent pricing, same-day service, and 24/7 emergency support across Mesa & the Phoenix Metro.
Who We Are
Founded in 2004 by U.S. Marine Corps veteran John Hall, Semper Fi Heating & Cooling LLC began with a single truck and an unwavering commitment to integrity, punctuality, and craftsmanship. Two decades later, our family-operated team continues to bring those core values to every home and business we serve.
Our mission is simple: deliver reliable, energy-efficient HVAC & plumbing solutions while honoring the Marine Corps values of honor, courage, and commitment. Whether you need a late-night AC repair in July or a full system redesign, we show up on time, in uniform, and ready to work.
- ✔Veteran-led & family-operated since 2004
- ✔Licensed, bonded, and insured in AZ & NV
- ✔A+ BBB rating and 4.9-star customer average
Our Services
From emergency repairs to energy-saving upgrades, Semper Fi delivers full-spectrum comfort solutions.
HVAC Installations
Energy-efficient systems from Trane, Carrier, and Lennox, custom sized for your property and installed with precision.
Emergency Repairs
24/7 rapid response for burst pipes, AC failures, and gas leaks—because comfort can’t wait.
Preventative Maintenance
Seasonal tune-ups that extend equipment life, lower utility bills, and keep warranties valid.
Duct Cleaning & Sealing
High-pressure cleaning and AeroSeal sealing to improve air quality and reduce dust by up to 85%.
Water Heaters
Tank & tankless installations, same-day repairs, and annual flush programs for optimum efficiency.
Indoor Air Quality
Whole-home air scrubbers, HEPA filtration, and balanced humidity solutions for healthier living.
Why Choose Semper Fi
Transparent Pricing
No surprises—flat-rate quotes and upfront options before work begins.
Same-Day Service
Book before 2 PM and a certified technician is on the way, usually within two hours.
Veteran & First-Responder Discounts
10% labor savings to honor those who serve our nation and communities.
5-Year Labor Warranty
Our craftsmanship is guaranteed long after the job is done.
Systems Installed
Emergency Calls Resolved
Avg Response Time
Advanced Technology
Our partnerships with industry leaders like Trane, Carrier, Lennox, Nest, and Ecobee allow us to deliver the most energy-efficient comfort solutions on the market.
- ✔Smart thermostats with remote monitoring
- ✔Variable-speed compressors for up to 30% energy savings
- ✔EPA-certified refrigerant handling
- ✔Digital job-site reports shared instantly with you
Eco-Friendly Practices
Going green isn’t a marketing line—it’s a duty. Our technicians follow strict EPA guidelines for refrigerant recovery, promote SEER2-rated equipment, and maintain a paperless office.
- • Proper refrigerant recovery & recycling
- • Responsible old-unit disposal partnerships
- • High-efficiency system promotions
- • Digital invoicing & scheduling
Customers report an average 28% reduction in energy bills after upgrades.
Special Discounts
10% off labor for all military members, veterans, police officers, firefighters, and EMTs—our way of saying thank you.
$75 off any HVAC repair for first-time customers. Mention code FIRST75 when booking.
Claim Your DiscountWhat Your Neighbors Say
“Semper Fi fixed my AC within hours during a 110° heatwave. Professional and fair pricing.”
Jane Pritchard • Mesa
“The team installed a new tankless water heater flawlessly. Loved the veteran discount!”
Mark Smith • Gilbert
“Our power bill dropped significantly after they suggested a variable-speed heat pump.”
Linda Nguyen • Phoenix
“Punctual, courteous, and explained every step. Five-star service all around.”
Rachel Garcia • Chandler
“Called at 11 PM with a leaking water heater—problem solved before midnight!”
Hiro Tanaka • Tempe
“The maintenance plan paid for itself in one season. Highly recommend the annual tune-up.”
Sandra Williams • Scottsdale
Meet the Team
John Hall
Founder & Lead Technician (USMC Veteran)
John brings 20+ years of hands-on HVAC experience and leads with Marine Corps-grade discipline and customer-first focus.
Maria Ruiz
Operations Manager
Maria orchestrates scheduling, inventory, and customer care—ensuring every service call runs like clockwork.
Proudly Serving
Our technicians are strategically stationed across the East and West Valleys for rapid response.
Primary Coverage
- Mesa
- Phoenix
- Chandler
- Gilbert
- Scottsdale
- Tempe
Secondary Coverage
- Glendale
- Peoria
- Queen Creek
- Las Vegas, NV (select services)
Frequently Asked Questions
Do you offer financing?
Yes—0% APR financing for up to 18 months on qualifying systems through our partner lenders. Ask our team for instant approval options.
Are your technicians certified?
Absolutely. Every technician is NATE-certified and completes quarterly factory training to stay ahead of evolving technology.
How quickly can I get service?
Book before 2 PM for same-day appointments. Emergency team members are available 24/7, 365 days a year.
Schedule Your Service
Prefer to talk? Call us anytime at (480) 616-3636.
- 📍1335 S Clearview Avenue, Suite 100, Mesa, AZ 85209
- ⏰Mon-Sat 7 AM-8 PM | Emergency 24/7
- ✉️[email protected]