Diamond Mechanical, Inc.

Diamond Mechanical, Inc. We specialize in mechanical and plumbing construction projects. Since 1969, we have built a solid reputation in Delaware as knowledgeable and note-worthy.

🚨 CAN'T SEE YOUR HVAC COILS? THAT'S A PROBLEM. 🚨One of the biggest goals of Diamond Mechanical's Service Department is h...
06/19/2026

🚨 CAN'T SEE YOUR HVAC COILS? THAT'S A PROBLEM. 🚨
One of the biggest goals of Diamond Mechanical's Service Department is helping our customers avoid costly breakdowns through our Preventative Maintenance Programs.
Take a look at your HVAC system's coils. If they're so dirty that you can barely see the fins beneath the buildup, your system is working harder, costing you more money, and potentially shortening its lifespan.
Dirty coils can lead to: ✅ Higher energy bills
✅ Reduced heating and cooling performance
✅ Poor indoor air quality
✅ Unexpected equipment failures
✅ Costly emergency repairs
A simple maintenance visit can help keep your system running efficiently and reliably all year long.
📞 If your HVAC system hasn't been serviced in a while, now is the time. Give Diamond Mechanical a call and let our team help keep your equipment operating at peak performance.
Don't wait for a breakdown—prevent it.

At DMI, we are focused on always improving our company and employees. Expanding our certifications and scope, helps us ...
06/12/2026

At DMI, we are focused on always improving our company and employees. Expanding our certifications and scope, helps us be at our best for any potential project. Recently some of our techs acquired their Med/Gas certification.

Another project completed with our partners at Yanmar. From the initial meeting with our clients to diagnosing and calib...
05/29/2026

Another project completed with our partners at Yanmar. From the initial meeting with our clients to diagnosing and calibrating, Diamond Mechanical’s employees are dedicated to our clients and projects. Start to Finish.

Did you know DMI also offers preventive maintenance programs to maintain and keep your equipment operating at its peak performance and efficiency? Call DMI (302-697-7694) today to see how we can maintain your commercial/industrial equipment.

🌸🌞 Spring weather has been unpredictable, but one thing's for sure—hot temps are on the way! 🔥Diamond's Service Departme...
05/13/2026

🌸🌞 Spring weather has been unpredictable, but one thing's for sure—hot temps are on the way! 🔥

Diamond's Service Department is standing by to keep your commercial HVAC systems running smoothly. Don't wait—give us a call at 📞 302-697-7694 and stay cool this summer! ❄️

Another great project for Diamond Mechanical with plumbing and HVAC scopes of work winding down. From a simple water cl...
05/08/2026

Another great project for Diamond Mechanical with plumbing and HVAC scopes of work winding down. From a simple water closet to booster pump system and medical vacuum system. Diamond also had the privilege of designing another flagship Yanmar GHP project. We are the Delmarva's authorized dealer and installer for Yanmar HVAC systems. Call Diamond Mechanical today to start your next project!!!

Proper regulation of water temperature in commercial applications is crucial. From maintaining specified temperature in...
05/01/2026

Proper regulation of water temperature in commercial applications is crucial. From maintaining specified temperature in commercial kitchens, proper water temps in bathrooms, to preventing microbial growth. Legionella is one of the “bad” microbes that can cause dangerous health conditions if the temperature is not regulated properly.
Check out the complex piping that our guys did on this project. Measure twice and cut once, definitely applies to this piping. Thanks for doing such a great job guys!!!!

Diamond Mechanical’s annual golf outing was a great success. We work hard year-round, and this event was a perfect oppor...
04/23/2026

Diamond Mechanical’s annual golf outing was a great success. We work hard year-round, and this event was a perfect opportunity for team building. Bringing together both field and office staff to relax, connect, and enjoy the beautiful weather.

Diamond Mechanical is an integral part of the Diamond Mechanical/Diamond Electric/Diamond State Engineering family. Thi...
04/17/2026

Diamond Mechanical is an integral part of the Diamond Mechanical/Diamond Electric/Diamond State Engineering family. This unique Engineering and Construction group gives us the ability to perform MEP (mechanical, electrical, plumbing) design-build project in-house. We also provide preventive maintenance for these projects. This sets us apart from most engineering and contractor firms.

Through this collaboration, we have designed and installed projects throughout Delmarva and the surrounding area. We include Yanmar GHPs (gas heat pumps) and CHPs (combined heat and power) as part of our design and service departments. Additionally, we provide full turn-key solutions for VRF, VAV, geothermal, cooling towers and industrial processes.

Our Diamond family is your first and only stop to provide a solution for every client.

04/16/2026

📝We're Hiring: Administrative Assistant.

Diamond Electric is looking for a dependable, organized Administrative Assistant to work directly with our management team and help keep daily operations running smoothly.

If you're someone who takes initiative, stays organized, and is eager to learn, this is a great opportunity to grow with a solid team.

WHAT YOU'LL DO:
✔️ Manage emails and assist with drafting documents.
✔️ Answer incoming calls on multi-line phone and communicate professionally.
✔️ Organize files and maintain records.
✔️ Take notes and support day-to-day office tasks.

WHAT WE'RE LOOKING FOR:
✔️ Strong organization and reliability.
✔️ Proficiency in Microsoft Excel and Word.
✔️ Experience with Microsoft Outlook.
✔️ Entry-level candidates welcome - must be teachable and willing to learn.

SCHEDULE: Monday - Friday (flexible 6 hour to full-time.
PAY & BENEFITS: Vacation, health benefits, IRA and Holidays available.

✉️ Send your resume to; [email protected]
🏃‍➡️ Or drop if off in person.

Our team doing another multiple unit Yanmar install. DMI's partnership with Yanmar Energy Systems, allows us the abilit...
04/03/2026

Our team doing another multiple unit Yanmar install. DMI's partnership with Yanmar Energy Systems, allows us the ability to offer cost savings, quiet operation, VRV designs that are easily adaptive for future expansion.
- Significant reduction of electric usage & Operation cost for HVAC
- VRV life cycle cost analysis
- 20%-30% more efficient than electric VRV/VRF systems
- 100% heating capacity at 0 degrees
- Variable speed and heat recovery system

https://youtu.be/zRdhr5NLFBc?si=HkvWecH-9W79_PKd

Address

3588 Peachtree Run
Dover, DE
19901

Opening Hours

Monday 8am - 4pm
Tuesday 8am - 4pm
Wednesday 8am - 4pm
Thursday 8am - 4pm
Friday 8am - 4pm

Telephone

+13026977694

Website

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