Trusted Experts in HVAC & Refrigeration
For over 23 years, Guaranteed Mechanical has proudly served restaurants and businesses across New Jersey. We provide 24/7 service, handling installation, maintenance, and repairs for walk-in refrigerators, freezers, rooftop HVAC units, and commercial kitchen appliances. When it comes to HVAC and refrigeration, we do it all!
Delivering Excellence Across Industries

Expanding Our Reach
In the last two years, we’ve worked hard to extend our services to the public sector and construction industry in New Jersey and New York—bringing our expertise to an even wider range of clients.

Certified & Qualified
We are SBE, MBE, and DBE-certified with the Port Authority of NY & NJ and hold DPMC-27 certification with the State of New Jersey for HVAC and refrigeration (HVACR).

Committed to Excellence
Our mission is to enhance the customer experience by offering convenience, cost-effective solutions, and top-quality service.
Meet Our Team

Calixto Guerra Sr
President & Sr. Project Manager

Calixto Guerra Jr
Vice President, Field Project Manager
Thank You for Trusting Us
We appreciate the opportunity to serve your business and look forward to continuing to support your success. Let’s keep your operations running smoothly—together!