For over two decades, Sandium Heating & Air Conditioning has been the trusted name for climate control solutions in San Jose. We understand that your home's comfort is about more than just temperature—it's about creating a healthy, efficient environment where your family can thrive.Our journey began in 2001 with a simple mission: to provide HVAC services that combine engineering precision with genuine care for our community. What sets us apart is our whole-home approach. We don't just fix immediate problems; we analyze your entire system, from ductwork to insulation, to deliver solutions that improve energy efficiency, indoor air quality, and long-term reliability.Our team consists of factor...
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Our Services
AC Repair & Maintenance
<p>When your air conditioning system fails during San Jose's warm seasons, you need reliable service you can count on. Our AC repair and maintenance services are designed to restore comfort quickly while preventing future breakdowns.</p><p>This service is essential for homeowners experiencing uneven cooling, strange noises, reduced airflow, or complete system failure. Whether you have a traditional central air system or a modern ductless unit, our certified technicians hav...
<p>When your air conditioning system fails during San Jose's warm seasons, you need reliable service you can count on. Our AC repair and maintenance services are designed to restore comfort quickly while preventing future breakdowns.</p><p>This service is essential for homeowners experiencing uneven cooling, strange noises, reduced airflow, or complete system failure. Whether you have a traditional central air system or a modern ductless unit, our certified technicians have the expertise to diagnose and resolve issues efficiently.</p><p>The process begins with a comprehensive diagnostic assessment using advanced tools to identify the root cause of your AC problems. We check refrigerant levels, electrical components, compressor function, and overall system performance. For maintenance visits, we perform a 21-point inspection that includes cleaning coils, checking drainage, lubricating moving parts, and testing safety controls.</p><p>What makes Sandium the best choice for your AC needs? Our factory-trained technicians stay current with the latest technologies and manufacturer specifications. We provide transparent pricing before any work begins, and our maintenance plans are designed to extend your system's lifespan while improving energy efficiency. With our same-day emergency service availability and commitment to using quality parts, you can trust us to keep your home comfortable through the hottest San Jose days.</p>
Furnace Installation & Repair
<p>Even with San Jose's relatively mild winters, a reliable heating system is essential for those chilly evenings when temperatures dip into the 40s. Our furnace installation and repair services ensure your family stays warm and comfortable throughout the cooler months.</p><p>This service is ideal for homeowners considering upgrading to a more efficient system, dealing with inconsistent heating, facing frequent repairs, or experiencing unusual noises from their furnace. We...
<p>Even with San Jose's relatively mild winters, a reliable heating system is essential for those chilly evenings when temperatures dip into the 40s. Our furnace installation and repair services ensure your family stays warm and comfortable throughout the cooler months.</p><p>This service is ideal for homeowners considering upgrading to a more efficient system, dealing with inconsistent heating, facing frequent repairs, or experiencing unusual noises from their furnace. We work with both gas and electric systems, providing solutions tailored to your home's specific requirements and energy goals.</p><p>Our installation process begins with a detailed assessment of your home's heating needs, including square footage, insulation quality, and existing ductwork. We'll help you select the right efficiency rating and size for optimal performance and energy savings. For repairs, our technicians use diagnostic equipment to pinpoint issues with burners, heat exchangers, blowers, or control systems.</p><p>Choosing Sandium for your furnace needs means partnering with experts who prioritize safety and efficiency. We conduct thorough combustion analysis and carbon monoxide testing with every installation or repair. Our team is trained in the latest high-efficiency technologies, and we offer flexible financing options to make system upgrades accessible. With our focus on proper sizing and installation techniques, we ensure your new furnace delivers reliable warmth while reducing your energy bills for years to come.</p>
Heat Pump Services
<p>Heat pumps offer an energy-efficient solution for both heating and cooling your San Jose home, making them increasingly popular in our moderate climate. Our comprehensive heat pump services include installation, maintenance, and repair of these versatile systems.</p><p>This service benefits homeowners looking to reduce their energy consumption, replace aging HVAC equipment, or add climate control to spaces without existing ductwork. Heat pumps are particularly effective in S...
<p>Heat pumps offer an energy-efficient solution for both heating and cooling your San Jose home, making them increasingly popular in our moderate climate. Our comprehensive heat pump services include installation, maintenance, and repair of these versatile systems.</p><p>This service benefits homeowners looking to reduce their energy consumption, replace aging HVAC equipment, or add climate control to spaces without existing ductwork. Heat pumps are particularly effective in San Jose's temperature ranges, providing efficient heating in winter and cooling in summer from a single system.</p><p>Our installation process involves evaluating your home's specific requirements, including insulation levels, window efficiency, and existing infrastructure. We'll help you choose between air-source and ground-source systems, considering factors like available space and long-term savings. For maintenance, we perform specialized checks on reversing valves, defrost cycles, compressor function, and refrigerant charge levels unique to heat pump technology.</p><p>Sandium stands out as the premier choice for heat pump services because of our specialized training in this advanced technology. Our technicians understand the precise balance needed for optimal heat transfer efficiency in San Jose's climate conditions. We provide detailed explanations of operating costs and potential savings, helping you make informed decisions. With our expertise in both traditional and ductless mini-split heat pump systems, we can design a solution that maximizes comfort while minimizing your environmental impact and utility expenses.</p>
Indoor Air Quality Solutions
<p>The air inside your San Jose home can be several times more polluted than outdoor air, affecting your family's health and comfort. Our indoor air quality services address this hidden concern with comprehensive testing and advanced purification solutions.</p><p>This service is valuable for households with allergy sufferers, asthma patients, or anyone concerned about dust, pollen, mold spores, or volatile organic compounds in their living environment. We also help homeown...
<p>The air inside your San Jose home can be several times more polluted than outdoor air, affecting your family's health and comfort. Our indoor air quality services address this hidden concern with comprehensive testing and advanced purification solutions.</p><p>This service is valuable for households with allergy sufferers, asthma patients, or anyone concerned about dust, pollen, mold spores, or volatile organic compounds in their living environment. We also help homeowners dealing with excessive humidity, dry air, or persistent odors that standard HVAC systems cannot adequately address.</p><p>Our process begins with thorough indoor air quality testing using professional-grade equipment to measure particulate levels, humidity, carbon dioxide, and specific pollutants. Based on the results, we recommend tailored solutions such as whole-home air purifiers, UV germicidal lights, advanced filtration systems, humidifiers, or dehumidifiers. For homes with ductwork concerns, we provide air duct installation and repair services to ensure proper circulation.</p><p>What makes Sandium the right partner for your indoor air quality needs? We approach air quality as part of your home's complete ecosystem, considering how your HVAC system, insulation, and ventilation work together. Our certified technicians have specialized training in air quality technologies and follow industry best practices for installation and calibration. We provide honest assessments without pushing unnecessary equipment, focusing instead on solutions that deliver measurable improvements to your home's environment and your family's wellbeing.</p>
“I had Sandium come out for a furnace inspection and tuneup. I was able to schedule my appointment entirely online. I received a text to confirm my appointment, and their technician Christopher arrived right on schedule. Christopher explained each test as he was performing it, and offered tips to maximize the life and efficiency of my furnace.
I highly recommend Sandium for your HVAC needs.
Price assessment
Great price
Services
Heating system maintenance”
— John Wilson
“I had Sandium come out to do a routine annual service call
They were very efficient and on time. I have a Carrier AC and heating and it has been efficient and reliable. I highly recommend this company”
— Merv Chang
“Sandium installed a major new duct system and additional registers in June, 2024.Waldo and Pedro did the installation and were extremely happy with doing their work. They provided a detailed diagram of the under house duct system and were very concerned with keeping our home clean. On January 5, 2026, Noe from Sandium came to conduct an inspection of our system and provided a detailed report. No problems were identified. We would be happy to recommend Sandium for any heating and A/C work. Janice & Gary Cherrier”
— Janice Cherrier
“Sandium's tech (Chris C) stopped by as scheduled and did a thorough job of inspecting our heater and suggested some small fixes (which could be delayed). He was efficient, knowledgeable and left everything clean. The service overall was great.”
— Ashish Dixit
“Noe did a great job, answered all my questions, showed me what he’d done. Sandium was great about communicating expected arrival time and time to do the work. Fair price too!
Price assessment
Great price
Price
$1–100
Services
HVAC system maintenance”
— Tom Olson
“We needed our 2 heat pump systems replaced after 17 years. Todd was our sales person. His communication was excellent from start to finish of the project. Jesus, the project manager came out with Todd two days in advance to review the project. They protected our floors, worked all day and by the end we had heat again. Jesus, Jaime, Joe, Porfirio, Antonio, Robert and John were great to work with and they kept me posted as it progressed and were sure I knew how to run the system before leaving. They went above and beyond. I highly recommend this company.
Price assessment
Reasonable price
Price
$1,000+
Services
Heating system installation”
— Anne C
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For over two decades, Sandium Heating & Air Conditioning has been the trusted name for climate control solutions in San Jose. We understand that your home's comfort is about more than just temperature—it's about creating a healthy, efficient environment where your family can thrive.Our journey began in 2001 with a simple mission: to provide HVAC services that combine engineering precision with genuine care for our community. What sets us apart is our whole-home approach. We don't just fix immediate problems; we analyze your entire system, from ductwork to insulation, to deliver solutions that improve energy efficiency, indoor air quality, and long-term reliability.Our team consists of factory-trained technicians who bring certified expertise to every job. Whether you're in the foothills or flatlands of San Jose, we understand how microclimates affect your home differently. That's why we tailor our recommendations to your specific neighborhood, home layout, and comfort goals.When you choose Sandium, you're choosing a partner committed to innovation, transparency, and lasting relationships. We stand behind our work with honest assessments, flexible financing options, and a dedication to keeping your home comfortable through every season.
