Diamond Air Services
Diamond Air Services is a HVAC provider serving Ontario, CA. Rated 5.0★ with 420 Google reviews. See services, review signals, and request a quote.
HVACOntario, CA
On this page
Company overview
- TradeHVAC
- Service areaOntario, CA
- Google rating5.0★ (420 reviews)
- Phone(909) 713-6644
- Address1630 E Francis St ste c, Ontario, CA 91761, USA
- CSLB License1047483 (ACTIVE)
Photos
Photos from Diamond Air Services, Jack Fang
What customers say
“This team from Diamond Air is the best! I purchased a full HVAC system 5 yrs ago. My heater suddenly stopped working and they came out the next business day. They diagnosed my system and determined th…”
“We are extremely happy that we chose Diamond Air Services. From start to finish, the entire experience was outstanding. Their level of professionalism, attention to detail, and quality of work truly e…”
“Howie and his team did an excellent job installing our new heater and removing the old one. From consultation to installation to city inspection, everything was completed so quickly and efficiently. T…”
“I called to have my AC unit inspected because my lower AC unit stopped cooling, and I’m so glad I found this company. From the moment I reached out, the response time was impressively quick. Howie was…”
“We recently needed to have a complete air duct replacement of our HVAC system. Baran and Oscar did an amazing job for us. They were professional and very knowledgeable…completing the job in half a day…”
Key highlights
Strengths
- Highly rated (5.0★ average)
- Large review volume (420 reviews)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does Diamond Air Services offer?
Diamond Air Services provides: HVAC diagnosis, repairs, and full system installs. They serve residential and commercial customers in Ontario, CA.
What is Diamond Air Services's rating?
Diamond Air Services has a 5.0 out of 5 star rating based on 420 Google reviews.
Is this company licensed in California?
Yes. License number: 1047483. Status: ACTIVE. You can verify on the Contractors State License Board (CSLB) lookup at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx.
Does Diamond Air Services offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-24. Reviews refreshed 2026-04-24.
Licensing data: Contractors State License Board (CSLB) · Company data: verified business records + Google Business profile
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