Commercial standards. Residential service.
We’ve spent decades installing heating and cooling for offices, warehouses, and complex buildings. RJM Systems brings that same engineering rigor — and the same accountability — to your home.
- Lifetime WarrantiesFor the ultimate peace-of-mind for as long as you own your home
- Verified PerformanceStatic pressure + CFM measured on every install
- Upfront Flat-Rate PricingPrice agreed before any tool is lifted
- Daikin Pro DealerPremium equipment, factory-trained installers
Built on 150+ combined years of experience
RJM Systems Group (formerly R&J Mechanical Services) is an experienced, dependable, and affordable heating, cooling and plumbing company located in West Chester, Pennsylvania serving the entire Delaware Valley. RJM was founded in 2019 by Richard & Julie Davis who knew they could offer a better customer experience to the people of the Delaware Valley.
RJM offers service, installation, sales, and design in both residential and commercial settings. Our resolute system experts take pride in their work, take the time to understand your needs, and exhaust all options in order to exceed your expectations. We look forward to meeting and working with you!
Six core values that guide every job
Our promise to our clients and to our team is to stand by our core values.
Safety
We believe safety is the frontline of our decision-making and actions. We take the right steps to keep our clients and ourselves safe.
Customer-Focused
The client comes first. We put ourselves in our client’s shoes and view things from their perspective. By listening, we get a better understanding of their needs — which helps us find the right solution.
Innovation
Good is never enough. We seek ways to raise the bar and challenge complacency to generate the best solutions.
Excellence
We work to the best of our ability. We are committed to giving high-quality performance that produces outstanding, lasting results.
Integrity
We do what is right and deliver what we promise.
Teamwork
Working as a team we make better decisions, and our work is more efficient. We work together to win together.
The highest standards. No exceptions.
Half of these are about the experience inside your home. The other half are about the engineering inside your system. We hold both to the same standard.
Real people who treat your home like family.
Clear updates, honest answers, no jargon.
Floors protected. Jobsite cleaner than we found it.
If something’s off, we fix it. Always.
Root-cause fixes, not symptom swaps.
Even comfort — room-to-room, floor-to-floor.
Same-day calls for no-heat and no-AC.
For the ultimate peace-of-mind for as long as you own the home.
* With active RJM ProCare Membership. Performance and Signature installation packages.
Licensed, certified, and accountable.
We carry the licenses and certifications that protect you — and we publish them.
- Daikin Pro Dealer
- PA-licensed HVAC contractor
- NJ-licensed HVAC contractor
- EPA 608 Certified technicians
- Fully insured & bonded
- BBB-monitored business
Meet a different kind of HVAC company
See for yourself why so many homeowners trust RJM.