Sandium Heating and Air Conditioning


Sandium is an engineering driven heating and air conditioning company based in the heart of silicon valley. Started in 2001, we are your residential heat and air conditioning expert. Our specialties include high efficiency furnace, AC installation, zoning, HEPA whole house filtration system, ductless VRF system, and system relocation. We are also a participant in the PGE Bayren energy efficiency rebate program.

San Jose, Santa Clara, Campbell, Saratoga, Monte Sereno, Mountain View, Palo Alto, Los Altos, Los Altos Hills, Cupertino, Sunnyvale, Los Gatos, Atherton, Woodside, Redwood City

  • Request Service

Lisa Rose
Lisa Rose
20:19 30 Apr 21
Just had Insulation Gurus put new blown-in cellulose insulation in my attic (all the old insulation had been removed... months earlier by another company so new HVAC ducting could be installed up there). Jacob was very helpful and responsive in preparing the quote and answering questions. And Brian and his crew did a friendly thorough job with the actual insulation (vacuuming beforehand, air-sealing cracks, baffling soffit vents, and getting the new cellulose layer nice & even).read more
Stewart Brown
Stewart Brown
12:35 20 May 19
Outstanding service. I needed service a sap to get air conditioner working and new Nest Thermostat installed. Contracor... came out and checked the AC, corrected our incorrect Nest assembly and installed it so that it works. He was fast and very friendly, just couldn't have been nicer and more accommodating. He also called to say due to traffic he would be 20 minutes delayed, which was really more
Ron Wakely
Ron Wakely
21:47 21 Sep 18
Sandium is by far the best I've tried here in Sunnyvale. Very courteous, no B.S. when it came to my quote and... "on-time"!!read more
03:46 18 Jan 17
I had Sandium Install new Infinity series Gas Furnace and Air-conditioner.The job was done in a professional manner.... The installation was thorough and the technicians explained the system .Tyler Lewis is the owner and he is very professional and very responsive to customer needs.I will recommend Sandium for HVAC more
Mark Davis
Mark Davis
19:03 31 Jul 15
Perhaps a bit more expensive than others, but absolutely worth the cost. We had Sandium install two systems in our... two-storey house. The attention to detail in planning the design, the workmanship, communication and final result are all top-notch. Strongly more
Madeleine Harmath
Madeleine Harmath
18:37 30 Jul 14
Tyler was our first point of in person contact with this company and we love him, just ask my dogs who get super... excited to see him when he comes.We had a big job to do and decided to start with the split system in our Great room. Unfortunately we couldn't find a solution to add the extension into the existing system. After much discussion the unit Tyler came up with is excellent. Our very large 600 square feet room with gable ceilings and full summer sun from dawn to dusk stayed wonderfully cool over this really hot summer we just had. We are looking forward to putting the heating side of this unit to work this winter.We were so impressed with the quality of work that we have now scheduled the second part and much larger job of replacing the duct work and current furnace with a furnace air condition for the rest of the house.The actual people who did the installation we very efficient and polite. Did a great job of installing everything and taking their mess away. Cleaning my yard up where they put the unit was excellent. Can't say enough great things about these guys!read more
Next Reviews
1045 North 10th Street, San Jose, CA, USA

(408) 539-7405

Monday 8AM–5PM
Tuesday 8AM–5PM
Wednesday 8AM–5PM
Thursday 8AM–5PM
Friday 8AM–5PM
Saturday Closed
Sunday Closed


  • Air Conditioning
  • Ductless Systems
  • Heating
  • Heat Pumps
  • Indoor Air Quality
  • Zoning Controls