About Sun State HVAC – Phoenix, AZ

Schedule your HVAC heating or cooling service with Sun State HVAC – trusted Phoenix experts since 1979.

Real People. Real Technicians. No Sales Reps.

Transcript of Play Our Video

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0:00 – Do you have a heating, ventilation, or air conditioning problem and need it fixed as soon as possible? Has it been a long time since you last maintained the HVAC system in your home or office?

0:15 – Finding the right HVAC contractor can sometimes be hard. You need to make sure they have the knowledge, skill, and experience to provide you with complete repair and maintenance services.

0:25 – That’s why we’re here to help. With a highly trained, licensed and insured team technicians, we’re proud to offer the best services in the field from sales and installations to repair and maintenance.

0:38 – We take each project with care and, we put the focus on open communication and getting the job done right the first time.

0:45– Maintaining the ventilation, air and heating systems in your home or office is the key to the longevity to your unit and effective energy savings.

0:54 – So don’t risk your money on an inefficient HVAC system.

0:57 – (Screen changes to a light yellow background with the Sun State HVAC (happy sun face) mascot and promotional message) Take 10% off when you call in today for AC repair or service.
HVAC – Call Now! (602)867-9480

0:57 – Call US! Today…

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The Little Company with the Big Name

- Air Conditioning
- Heat Pump - Repair or Replace
- Furnace - Repair or Replace
- Air Quality Control
- No Contract Maintenance Services

The Smart Choice

- Honest
- Reliable
- Trustworthy
- Family
- Phoenix Natives!

"Where Honesty Rules!"

- Quality of Being Honest
- Honor - Integrity
- Uprightness - Fairness
- Free from Deceit or Fraud
- Implies a Refusal to Lie

How it All Started

A Word to the Wise

Comfort Specialists Who Care

Hello dear friends — my name is Mark Gresin. I was born and raised in Phoenix, Arizona, in 1950. I founded Sun State HVAC, a trusted HVAC company in Phoenix, in 1979. Here’s a brief look at how it all began.

Growing up, I was a hands-on, curious kid obsessed with fixing things. After serving honorably in the Air Force during the Vietnam era, I returned home and worked in my parents’ restaurant — Gross’ Delicatessen — a well-known establishment here in Phoenix.

That experience taught me two things: the importance of service, and how hard it was to find an HVAC company that understood the needs of restaurants — clean, precise, respectful, and reliable. That gap inspired me to start Sun State HVAC, dedicated to serving both residential HVAC and commercial customers with integrity.

Built on Family, Grown on Integrity

My wife Dorena brought her incredible experience in office management and customer service to help build this business. Together we raised our son, Sean Gresin, who later joined the team and now helps lead Sun State HVAC into the next generation.

As a family-owned HVAC company in Phoenix, We’ve stayed intentionally small — not because we couldn’t grow, but because we choose to stay close to our customers, honest in our pricing, and focused on the craft, not the sale.

Be careful who you trust. Many big-name HVAC repair companies in Phoenix spend tens of thousands on advertising — and guess who ends up paying for that? You do. From jingles to flashy logos, those costs get passed right onto your bill.

These companies often use high-pressure tactics, upsell things you don’t need, and send out jack-of-all-trades who aren’t HVAC specialists. That’s exactly why we became the first HVAC company in Phoenix to offer free second opinions — because more often than not, your system just needs some honest TLC.

At Sun State HVAC, we believe trust should be earned — not bought with gimmicks. That’s why we keep our pricing fair, our recommendations honest, and our marketing low-key. We don’t need to shout from billboards to prove our value — our work speaks for itself. And if we don’t think you need a new air conditioner system, we’ll tell you straight. That’s what makes us different — and why so many customers keep coming back.

We’re not salespeople — and we don’t hire them either. We’re trained, experienced, seasoned HVAC specialists in Phoenix. We make AC systems purr like kittens and heating systems run like clockwork. Whether it’s a strange noise, weak airflow, or rising bills — we can fix it.

Remember: your system might not be broken — it might just need someone who knows how to treat it right.

To us, it’s not just about air conditioning repair — it’s about restoring comfort, peace of mind, and trust. We show up on time, clean up when we’re done, and explain exactly what we’re doing so you’re never left guessing. That’s how we’ve done it since 1979 — and it’s how we’ll keep doing it for years to come.

Real People. Real Technicians. No Sales Reps. Just a trusted HVAC company that cares.