Doing business in all 50 US States, Canada, The Bahamas, & Australia

About Us

About Marrs HVAC Design

Marrs HVAC Services offers comprehensive, accurate, and timely HVAC design, energy efficiency evaluation and estimation services to small and large companies, in addition to homeowners. Marrs HVAC Design aims to act as a valuable team member for you during the entire build or renovation project, delivering highly efficient and well-informed HVAC designs, estimations, and recommendations. 


Our founder, David Marrs, began working in HVACR over 25 years ago. Starting in refrigeration and moving on to HVAC, he started from the bottom, gradually working his way up to starting his own business, Marrs HVAC Design.


Currently, he is a licensed HVAC contractor in the state of Florida, a resident HERS Energy Rater, an ICC Energy Inspector and Plans Examiner, and he’s been teaching people about using ACCA approved HVAC design software since 2001.

Marrs HVAC design services

Along with his design supervisor, Latisha Furmon, and a team of licensed, insured, and highly-trained technicians, Marrs HVAC Design offers 25+ years of experience to you! Marrs HVAC Designs leads the industry in effective HVAC system design and planning, performing at high levels for a variety of modern built structures including residential homes to commercial spaces.

Why Marrs HVAC Design?

Marrs HVAC Designs leads the industry in effective HVAC system design and planning, performing at high levels for a variety of modern built structures including residential homes to commercial spaces.


Our priority is producing plans that guarantee high performance, energy saving, and environmental sustainability, saving our clients thousands of dollars annually on their energy costs. All our designs are performed adhering to ACCA industry standards.

  • Timeliness: We understand the importance of delivering high-quality and accurate designs and estimates in a timely manner. Rather than waiting one to three weeks for your products, you can expect them in 3-4 business days, guaranteed. We also offer Same day before 5pm and 24 Hr. turn-around for those managing multiple clients at once, or those in a time crunch.
  • Commitment to Your Success: Our goal is to accurately communicate your vision for your residential or commercial HVAC designs, in addition to providing incredibly accurate energy efficiency evaluations that allow you to thoroughly understand and improve the efficiency of your built environment. We aim to act as a valuable member of your build team, meeting and exceeding all of your expectations
  • Proactive & Adaptive: The HVAC industry is constantly changing, providing innovations that lead to a greener, more efficient modern built environment. Ongoing education and combined with constant attention paid to the latest in HVAC allows us to deliver to you the highest quality solutions available. Working in all climate zones, all 50 states plus Canada, the Bahamas, and Australia, we are an international leader in HVAC design.
  • Personalized Solutions: With 25+ years of experience, we understand what does and what doesn’t work for residential and commercial built environments, alike. Our designs allow you to reach your and your client’s energy efficiency and comfortability goals, based on your climate and building specifications.

Core Values

Marrs HVAC Services

Professional Design & Building Sciences

When meeting energy codes and providing HVAC designs, it’s imperative to have the right team of HVAC designers and planners. Our team at Marrs HVAC Design are trained and prepared, bringing in-depth knowledge of the functionality of HVAC systems to your build. Allow Marrs HVAC Design to serve as a valuable member of your team during the entirety of your build or renovations.

Give us a call or schedule an appointment online today for a personalized estimation.

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