Next Day Air & Heating

Next Day Air & Heating is a family-owned, full-service HVAC partner trusted by homes and businesses across the North Bay and Central California. Our focus is on comfort, reliability, and clear communication from the first call to final walkthrough. Whether you’re planning a system upgrade or need a quick fix to get your equipment running safely and efficiently, our technicians bring deep, hands-on expertise to every visit. We handle a complete range of HVAC needs, including AC Repair & Installation, Heating Repair & Installation, Indoor Air Quality solutions, and Water Heaters, all tailored to your property and usage goals. If your heating system is making unusual noises, delivering uneven warmth, or failing to start, our targeted furnace repair approach prioritizes accurate diagnostics and durable, manufacturer-aligned solutions. For cooling, we design and install air conditioning systems that balance performance and efficiency, and we service all major brands to keep your setup running smoothly through peak seasons. Indoor Air Quality matters just as much as temperature, so we offer filtration and purification options that help reduce particulates and support a healthier environment. For Water Heaters, we provide dependable replacement and repair services that focus on safety, consistency, and long-term value. As a locally rooted, family-operated team, we take pride in straightforward scheduling, clear estimates, and workmanship that respects your time and your space. We support both residential and commercial clients with maintenance plans designed to prevent downtime and extend equipment life, and we can pair new installations with flexible financing to make upgrades more accessible. When you want a responsive crew that treats your comfort as a priority, count on our knowledgeable professionals to deliver thoughtful recommendations and clean, careful execution, so your system performs when you need it most. Address: 651 Portal St #6,, Cotati, CA, 94931 Hours of operation : Mon - Sun : All Day