Elevate Your Comfort

Elevate your home’s comfort and savings with our exclusive limited-time offer. Save $500 on new HVAC system installations. Whether you’re replacing an outdated unit, upgrading, or starting a new construction project, our experts provide top-tier solutions for your comfort. Don’t miss out!

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    Lower Utility Bills

    Upgrade to a new HVAC system and unlock the secret to lower utility bills. Old, inefficient units can drain your budget with each use and often require costly repairs. Make the switch today to a system that can boost cooling efficiency by up to 30%, delivering substantial energy and cost savings.

    Take Advantage of a Second Quote

    We believe in transparency and empowering our customers to make informed decisions. That’s why we offer a complimentary second quote. Compare our competitive pricing and discover the value of choosing Steadfast Mechanical.

    Transparent Pricing Matters

    Our commitment to transparent pricing ensures you always know what you’re getting. No hidden fees, no surprises. Experience peace of mind knowing you’re making a smart investment in your home’s comfort and efficiency.

    Honoring Our Heroes

    As a veteran-owned business, we honor heroes with special HVAC service discounts for veterans, active-duty military, and first responders. It’s our way of thanking you for your service. Enjoy savings on parts and service as our token of appreciation.

    HVAC Systems & Efficiency

    Living in Arizona, where hot summers are the norm, it’s crucial to understand the advantages of different SEER (Seasonal Energy Efficiency Ratio) air conditioning systems. Lower SEER units like 15 SEER offer a good balance of efficiency and affordability, making them a sensible choice for many Arizona homeowners. However, higher SEER systems like 20 SEER provide exceptional efficiency, which can significantly reduce your energy bills during the scorching Arizona summers. The decision ultimately hinges on your budget, your desire to save on long-term energy costs, and the extreme desert heat we experience here in Arizona. Our experts are here to guide you through these options and help you make the right choice for your Arizona home.

    REME HALO™ Whole Home In-Duct Air Purifier (UV Light)

    14-16 SEER

    Lower, Economical Cost

    Warranty: 5 years ballast / 2 years cell

    Reduce Common Allergy Triggers

    Eliminates Pet Odors & Unwanted Smells

    More Details

    The REME HALO® isn’t your typical UV lamp. It’s a game-changer, actively enhancing your home’s air quality. Unlike many air purifiers that simply sit passively or struggle to tackle pollutants effectively, the REME HALO® goes further. It doesn’t just rely on UV light; it incorporates cutting-edge proprietary technologies. One standout feature is its ability to generate low levels of hydrogen peroxide in the circulated air. As it operates throughout your air-conditioned spaces, the REME HALO® efficiently reduces bacteria, viruses, odors, and mold spores in both the air and on surfaces. Experience the transformative impact of a REME HALO® – contact us today for a healthier living environment!


    18-20 SEER

    Higher Efficiency and Lower Utility Bills

    Compatible with SmartSensor

    Save up to 23% on annual energy costs

    Control from anywhere on iOS and Android

    More Details

    Introducing the Ecobee3 Lite Smart Home Thermostat, your key to balanced comfort, savings, and energy efficiency. Priced at just $319, installed, this smart thermostat is designed to revolutionize your home climate control. It’s not just about convenience; it’s about keeping your home comfortable while saving up to 23% annually on heating and cooling costs. With seamless control from anywhere on iOS and Android, Apple HomeKit compatibility, and integration with leading smart home ecosystems, it’s a thermostat that adapts to your needs. Plus, enhance your comfort in specific rooms with SmartSensor technology. Be prepared for the future with features like occupancy detection, which automatically manages your temperature and even pauses when doors or windows are open. And for our heroes, we offer special discounts for veterans, active-duty military personnel, and first responders. Trust ecobee for a smarter, more efficient, and comfortable home.


    Variable-Speed Systems (Variable SEER)

    SEER ratings from 20-25+, Most Efficient

    Square Footage: 600 sq ft

    Quiet, Ductless A/C

    Warranty: 5 years

    BTU: 16,000

    More Details

    This Mitsubishi Ductless 16K BTU Air Conditioner Mini Split, designed for rooms up to 600 sq ft, offers a host of features to cater to your home or business needs. Not only does this Mitsubishi Ductless Air Conditioner Mini Split provide a cost-effective and eco-friendly cooling solution, but it also grants you the power to control each zone in your home independently, enabling you to conserve energy.

    What sets the Mitsubishi Ductless Air Conditioner Mini Split apart is its room-specific air handlers, which continuously measure return air and make automatic adjustments. This innovative approach ensures precise comfort in every room, eliminating the need for a central thermostat and the inefficiencies associated with traditional cooling systems.


    Call (480) 919-5309

    Satisfaction Guaranteed

    Veteran Values

    Family Owned & Operated

    Financing Available

    Transparent Pricing

    Over 80, 5-Star Reviews

    Service Plans Available

    Increase the Life of Your System

    $49.99 Tune Up

    54-Point Inspection & Tune Up

    Reserve by Phone

    Call Us 24/7

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    Read Our Reviews

    Customer satisfaction is our number one priority. We pride ourselves on Word of Mouth advertising and do our best to live up to our name by being Steadfast in our duty and service.

    We Got You Covered with Financing

    Steadfast Mechanical works with two separate finance systems, to provide our customers with the financial backing you need to stay cool and comfortable.

    How often should I complete an HVAC Service?

    HVAC systems have measures taken to help reduce the amount of dust and debris the system takes on, but in Arizona, with dust storms and wind being a major factor, HVAC Systems take a beating throughout the year. This is why we recommend you to service or tune up your system at least once a year after Haboob season, and sometimes twice for older units.

    What does an HVAC technician do during a tune-up?

    Our technicians are trained to conduct a 54-point inspection of your entire system stress points and data factors. Technicians review run capacitors, check amperage on the compressor(s), review the system for loose or weak points, look for leaks in the drain pan and system, check low and high side Freon pressors, and check for play in the condenser motor. The list goes on. Bottom line, we check the system top to bottom, for just $49.99.

    Is this for swamp coolers and commercial systems?

    Unfortunately no, this offer is specific for residential units. We do handle commercial service, maintenance, and tune-up calls at Steadfast Mechanical, along with new installs.

    To get a custom price and discount, mention STEADFASTCOMMERCIAL when you call, to get 10% off your total invoice. 

    How long does it take to do a service?

    Most service calls can take between 1-3 hours, provided access is uninhibited and the size of the system.

    I had an amazing experience! They were super responsive and they were extremely reasonably priced compared to everyone I shopped. Definitely coming back in the future.

    Justin Chaparro

    Steadfast Mechanical was awesome! They showed up right away even though it’s busy season! They were very professional honest and easy to work with, I highly recommend them you won’t be disappointed.

    Jason Flanders

    This mini split they did in my shop is a game changer! These guys had better equipment, better warranty, and hundreds cheaper than the other bids I got. My friends are jealous how cool it is when we train or wrench even on these crazy hot days. Thanks Brandon, you do great work!

    Joseph Bridges

    Contact Us


    +1 (480) 919-5309

    Serving all of Maricopa County!