Business Details
17 Years
experience
Emergency
services
Residential & Commercial HVAC Services in San Jose
DG Heating & Air Conditioning has been serving San Jose since 2009, specializing in residential and commercial HVAC solutions. Our team combines over 30 years of experience with a commitment to customer satisfaction, offering transparent communication, free estimates, and BBB-accredited services. We provide comprehensive heating, air conditioning, and indoor air quality solutions, including repairs, installations, and maintenance.Our technicians prioritize punctuality, professionalism, and problem-solving, ensuring each project meets exacting standards. With financing options available and partnerships with industry-leading manufacturers, we deliver reliable systems tailored to local climate demands. Our focus on building long-term relationships has earned consistent positive reviews for technical expertise and courteous service.
Services
Air Conditioning Repair
Heating Installation
Ductless Systems
Indoor Air Quality
Commercial HVAC
Emergency Repairs
System Maintenance
Heat Pump Services
Duct Cleaning
New Construction HVAC
Details
- Year established: 2009
Highlights and features
- We offer free estimates with no-obligation consultations.
- Our team maintains BBB-accredited status for business integrity.
- Technicians have 30+ combined years of HVAC expertise.
- We provide 18-month no-interest financing options.
- Serving 20+ Southern Bay Area communities since 2009.
Associations and certifications
- BBB
What people say
Professional crew
On-time service
Clear communication
System works great
Competent technicians
Services
Air Conditioning Repair
Our certified technicians diagnose and repair all air conditioning system issues with prompt, reliable solutions. We use advanced diagnostic tools combined with 30+ years of collective experience to restore cooling efficiency while minimizing system wear. Specializing in both residential and commercial units, we maintain operational integrity through precision repairs and genuine manufacturer parts.
Heating Installation
We install high-efficiency heating systems tailored to Northern California's climate conditions. Our process begins with Manual J load calculations to determine optimal system sizing, followed by proper venting configuration and performance testing. Technicians ensure EPA-certified refrigerant handling while maintaining manufacturer warranty requirements through documented installation procedures.
Ductless Mini-Splits
Custom ductless HVAC solutions for homes and businesses without existing ductwork. Our NATE-certified installers design multi-zone systems with precise refrigerant line routing and wall-mount placement optimization. We program smart thermostats for energy-efficient climate control while maintaining aesthetic integrity of historical or modern structures.
Indoor Air Quality
Comprehensive air quality assessments identify particulate, VOC, and microbial contaminants. We install HEPA filtration systems, UV germicidal lights, and advanced air scrubbers to reduce allergens by 98%. Our solutions comply with ASHRAE Standard 62.1 for ventilation performance in both residential and commercial environments.
Commercial HVAC
Full-service commercial HVAC maintenance and emergency repair programs for office buildings, retail spaces, and industrial facilities. Our team performs ASHRAE-compliant preventive maintenance on rooftop units and VRF systems while offering 24/7 dispatch for critical temperature control needs across Santa Clara County.
Questions
What HVAC services do you offer in San Jose?
We provide residential and commercial AC repair, heating installation, ductless systems, indoor air quality solutions, and emergency HVAC services across Santa Clara County.
Do you offer financing options for HVAC systems?
Yes, we provide 18-month no-interest financing with minimum monthly payments of 2.5% of the total amount financed for complete system installations.
Which areas do you service besides San Jose?
We serve 20+ communities including Palo Alto, Mountain View, Los Gatos, Menlo Park, Redwood City, and the entire Southern Bay Area.
Are your technicians certified?
Our team holds NATE certifications and undergoes continuous manufacturer-specific training for equipment from Mitsubishi, American Standard, Carrier, and Trane.
Do you provide 24/7 emergency service?
Yes, we offer after-hours emergency HVAC repair with a dedicated dispatch team available for urgent temperature control issues.
How can I schedule HVAC maintenance?
Schedule service by calling 408-669-3496 during regular business hours or request appointments online through our customer portal.
Reviews (5)
David Dagama
Jun 21, 2022
Report
John and his crew were awesome, professional, knowledgable, and very efficient, couldn't have asked for better service any where, great experience, I would recommend them to anyone! Services: Thermostat installation, HVAC duct & vent installation, Heating system installation, Install AC, Install thermostat
Ken McAllister
Apr 17, 2022
Report
Above excellent service and caring! We are at University Gardens which has specialized needs for townhouse. We originally had a unit going out, they were very accommodating in help us limp along 4 an extra 4 years till we were able to replace our A/C-heating unit. When we were ready, the were out right away to give an estimate, the estimate was TOTALLY REASONABLE and extremely fair! They got us in right away!
The crew were professional and on point! Just to let you know as potential customers, the other bids were ridiculous because DG knew our building and the nuisances of our complex. They were completely prepped and ready. The unit was replaced and working the same day. I cannot say enough good things about this company! Thank for from both of us!
The crew were professional and on point! Just to let you know as potential customers, the other bids were ridiculous because DG knew our building and the nuisances of our complex. They were completely prepped and ready. The unit was replaced and working the same day. I cannot say enough good things about this company! Thank for from both of us!
Jerry Fragoza
Jan 24, 2022
Report
I had called DG Heating & air conditioning for my mothers home in San Jose. I left a message on a sunday, The owner returned me call with in 20min. John informed me on what steps to take, on Monday he had Eddie The service Tech come out to fix the heater with in 10 minutes, He found the problem and fixed the heater. The service was great. Thank You DG Heating & Air conditioning for Five star service. Thank you Eddie
Sarah Leslie
Dec 28, 2021
Report
I met with ~10 companies before settling on DG Heating. They are professional and thorough. They replaced my ductwork in the time quoted and will come back anytime to adjust the dampers. I had a small issue with condensation and they came the next day to fix it. There was some miscommunication between my husband and I resulting in overpayment and DG contacted us immediately to send a check. Honest, professional, quality work.
Robert Enyedi
Sep 30, 2021
Report
The professionals from DG helped us with a complex AC installation for a condo during the peak season of summer for a competitive price. There were complications with delays due to tenants moving out and they had to figure out the right solution to route everything. During all this I had great communication with the team, they were extremely patient, we looked at several low noise equipment options.
Then they managed to squeeze me in into their busy schedule, the crew came out to plan everything and then came back again for the install. That took a day but everything went smoothly as they worked orderly, quietly and cleanly, patched up all the sheet rock and made sure that I was happy. Highly recommended.
Then they managed to squeeze me in into their busy schedule, the crew came out to plan everything and then came back again for the install. That took a day but everything went smoothly as they worked orderly, quietly and cleanly, patched up all the sheet rock and made sure that I was happy. Highly recommended.
