D&H Fire Protection
(909) 929-8100
By the time you smell it, it's already begun. Not here.
Why it matters
The numbers behind the urgency.
lower civilian death rate in fires where an automatic suppression system was present
of sprinklered fires stayed contained to the room where they started
is all it takes for an unchecked fire to flash over and engulf a room
Sources: NFPA, U.S. Fire Administration
The other 47 seconds
Not luck. Three systems that were already paying attention.
Stopping fires before they get out of hand isn't an accident. Here's how we do it.
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01
Detection
It doesn't take fire for the system to notice. It's reading the air, continuously, at 2 a.m. the same as 2 p.m., whether anyone's in the building or not.
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02
Suppression
Only the head above the heat opens. Not the ten beside it. One fire gets one answer, not a flood.
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03
Notification
The signal doesn't stop at the panel. It reaches a monitoring station, and the fire department, faster than anyone on site could've made the call.
What we do
Fire protection, and everything that backs it up.
D&H is here to protect your building: designed, installed, and serviced by our in-house team. You don't need to know which system you need going in. That's our job. We'll walk you through it in plain terms and tell you what's actually necessary.
Fire Protection
Fire Alarm, Detection & Monitoring
A fire caught in its first minute is an inconvenience. Caught an hour later, it's a total loss. Our systems never sleep, watching around the clock and alerting the right people the second something's wrong.
Flame Detection
Smoke has to travel to a sensor before it triggers an alarm. Flame doesn't. UV and IR cameras see the fire itself, the literal light of ignition, even across an open bay or a windy loading dock where smoke would disperse before it ever reached a detector.
Fire Suppression
Every space carries a different risk, and the wrong system can do as much damage as the fire itself. Whether it's a warehouse full of inventory or a server room full of equipment that can't get wet, we'll design and install the system that fits.
Security & Safety
Security & Burglar Alarm
Keep unauthorized people out, and know the moment someone tries. Wireless intrusion alarms, security cameras, and access control working together, plus portable monitoring units for parking lots and other open areas.
Hazardous Gas Detection
Some hazards you can't see or smell until it's too late. We install detection systems that catch dangerous gases like methane and carbon dioxide before they become a health or safety risk.
Inspection, Testing & Maintenance
A system is only as good as its last inspection. We test, maintain, and repair the alarm and detection systems we work on, so if something's wrong, you find out from us, not during an emergency.
Industries we serve include commercial and industrial facilities across Southern California, with growing work in aerospace, industrial logistics, and data centers.
Get an assessmentWho's behind it
Built on equipment we trust.
We install and service systems from established, proven manufacturers, not whatever's cheapest that week.
Family-owned since 2016
Purpose before profit. Still true.
D&H designs, installs, and monitors fire alarm, suppression, and security systems for businesses across Southern California, because it's not just a job, it's our neighborhood too.
- Designed in-house. Most companies outsource system design. We don't. Every job is drawn, engineered, and signed off by our own team.
- We show up. When other vendors over-promise and under-deliver, we show up and finish the job. Most service calls are handled within days, not weeks.
- Reports you can actually read. Inspection and test reports written in plain language, not jargon, so you know exactly what was found and what it means.
- Fair, transparent pricing. Not the cheapest bid, not the most expensive. Priced for the work, from people who know the work.
- Environmentally responsible. Protecting your building shouldn't come at the planet's expense. We favor clean-agent and low-impact systems wherever they fit the job.
Get in touch
Request a system assessment.
Tell us a bit about your building and what you need. We'll get back to you directly, no call center in between.
"D & H Fire Protection Inc did a wonderful job. Every protective feature in my building looks professional and clean. Their crew came in and got the job done in a timely manner. When they left the work area was left spotless. D and H Fire Protection are the best in San Dimas."
Anthony N.
"We chose D&H Fire Suppression Services based on their stellar reputation, and they did not disappoint. Their attention to detail and commitment to safety were evident from start to finish. Thanks to them, we feel confident that our facility is well-protected, and we highly recommend them to anyone in need of fire suppression solutions in San Dimas."
Steve K.
"D&H Fire Suppression Services exceeded our expectations in every way. Their team was incredibly professional, installing our system quickly and with minimal disruption to our operations. Knowing we have top-notch fire protection in San Dimas gives us peace of mind, and we couldn't be happier with their service!"
Helen R.