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HVAC Systems in Orange County


The Heart of Your Home's Comfort.


Imagine a home that maintains the perfect temperature year-round, air that feels fresh and clean in every room, and the quiet hum of an energy-efficient system keeping your family comfortable. Your Heating, Ventilation, and Air Conditioning (HVAC) system is the invisible force behind your home's comfort and health. At Sanctuary Design & Build, we specialize in designing and installing high-performance HVAC systems that deliver reliable comfort and superior air quality.


As Orange County's trusted HVAC contractor, we know that homeowners from Irvine to Newport Beach expect systems that are not only powerful but also quiet, efficient, and perfectly sized for their homes. You're not just looking for an air conditioner; you're seeking a complete climate control solution that enhances your well-being and lowers your utility bills. Whether your search was for "central AC replacement Orange County" or "ductless mini-split installer Irvine," you've found a partner dedicated to expert engineering and precision installation.

A modern HVAC system is a key component of a comfortable and healthy home. To help you explore the best solutions, we've organized our expertise into the following distinct Project Types. Each serves as a starting point for a conversation about your specific needs, from replacing an aging unit to zoning your home for maximum efficiency.


  • Central Air Conditioning System Installation/Replacement: Expert installation of a new, high-efficiency central AC unit or complete replacement of an existing system for reliable cooling.

  • Furnace / Heating System Installation/Replacement: Professional installation of a new gas furnace or an energy-efficient heat pump system to provide consistent, reliable heating.

  • Ductless Mini-Split System Installation: Installation of versatile and highly efficient ductless mini-split systems for targeted heating and cooling in specific rooms or zones.

  • HVAC Ductwork Design & Installation/Modification: Designing and installing new, properly sealed ductwork or modifying existing ducts to ensure optimal airflow and system efficiency.


    And more, including Whole-House Ventilation Systems (ERVs/HRVs) for superior indoor air quality.


Our design process tailors every system to your home's specific needs. Whether you require a powerful central system for a large home, a quiet heat pump, or a multi-zone ductless solution to solve comfort issues in specific rooms, our team specializes in designing the perfect climate control system for your lifestyle.

Explore Our Services & Styles

We believe an HVAC system's performance depends entirely on its design and installation. Our reputation is built on a foundation of trust, technical expertise, and an unwavering commitment to our clients.
  • Unmatched Local Expertise: Our deep understanding of California's Title 24 energy codes and how to perform precise load calculations for Orange County's climate ensures your system is perfectly sized—not too big, not too small—for maximum efficiency and comfort.

  • An Unwavering Commitment to Craftsmanship: We stand behind our work. Our reputation is built on meticulous installation practices, from ensuring perfectly sealed ductwork to correctly charging refrigerant lines, guaranteeing your system performs at its peak factory-rated efficiency.

  • An Investment in Your Home's Efficiency & Health: A new, high-efficiency HVAC system is a direct investment in lower monthly energy bills. Furthermore, modern systems with advanced filtration and ventilation dramatically improve indoor air quality, creating a healthier environment for your family.

  • Designs for a Quiet & Comfortable Home: Beyond simple heating and cooling, we design systems for a superior living experience. We focus on quiet operation, eliminating hot and cold spots, and providing consistent comfort in every corner of your home.

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The Sanctuary Difference

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Our Commitment to a Superior Remodeling Experience

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Empower your HVAC choices with exclusive access to our Lumina educational hub and heating and cooling systems studio.

Enjoy lasting confidence in your home's comfort, with your new HVAC system protected by our comprehensive Sanctuary Care workmanship warranty.

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Discover our transparent, step-by-step design-build process that ensures a high-performance HVAC installation from concept to completion.

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Meet the veteran, family-owned specialists in HVAC system design and installation, fully licensed and insured for your peace of mind.

  • "How much does a new central AC and furnace system cost in Orange County?"

    • The cost for a complete system replacement depends heavily on the size of your home and the efficiency rating (SEER) of the units. For an average-sized home, a new system typically ranges from $12,000 to $20,000+. We provide a precise quote after performing a professional load calculation.

  • "What is a heat pump, and is it a good option for Southern California?"

    • A heat pump is an incredibly efficient all-in-one system that provides both heating and air conditioning. Instead of creating heat, it moves it—pulling heat out of your home in the summer and pulling ambient heat into your home in the winter. They are an excellent and highly efficient choice for our mild Orange County climate.

  • "Are ductless mini-splits better than central air?"

    • It depends on the application. For additions, garages, or homes with specific problem rooms (one that's always too hot or cold), ductless mini-splits are a fantastic and efficient solution. For whole-home cooling, a well-designed central air system is often still the preferred choice.

  • "My energy bills are high. Is it my AC or my ductwork?"

    • It could be both. An aging AC unit is often inefficient, but leaky or poorly designed ductwork in a hot attic can be a huge source of energy loss, forcing your system to wo

Your journey to a more comfortable, efficient, and healthier home starts with a simple conversation. Let's begin the process of designing the perfect HVAC system for your family's needs.

Your Questions, Answered

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