Boiler Combustion & Efficiency Testing
Checking fuel usage, flame quality, carbon monoxide levels, and overall efficiency.
Boiler Component Integrity Check
Evaluating burners, pumps, controls, wiring, and seals for wear or failure.
Pressure & Safety Valve Inspection
Ensuring relief valves, gauges, and pressure controls operate safely.
Water Level & Circulation Testing
Ensuring correct water levels and proper system flow to prevent overheating or damage.
Venting & Exhaust System Review
Inspecting vent pipes and chimney connections for proper airflow and carbon monoxide safety.
Code Compliance & Permit Guidance
Ensuring all boiler installations and replacements meet Nassau and Suffolk County mechanical codes.
Trusted Heating Expertise for Long Island Homes & Businesses
Our Boiler Safety & Inspection Services Include:
NJM performs detailed boiler safety inspections to ensure proper functionality, safe operation, and full compliance with Long Island heating standards.
Find Heating Services Near You!
Service Area Links:
- Long Island
- Nassau County
- Suffolk County
Professional Boiler Installation & Heating Services on Long Island
Ensure reliable heating all year long with NJM’s expert boiler installation, repair, replacement, and maintenance services. We work with all major boiler systems and deliver safe, code-compliant installations for homes and businesses across Nassau and Suffolk County.
Licensed Technicians • Energy-Efficient Systems • Reliable Heating Solutions
Trusted Boiler Installation & Heating Experts on Long Island
Selecting the right boiler system is essential for long-term heating performance, energy efficiency, and cost savings. NJM Mechanical and Contracting helps homeowners determine whether a modern wall-hung boiler or a traditional floor-standing (conventional) boiler is the best choice for their property. Our licensed technicians evaluate your heating needs, available space, fuel type, and efficiency goals to recommend the ideal system.
Wall-hung boilers offer compact installation, higher efficiency ratings, and advanced modulation technology — perfect for homes seeking lower fuel consumption and modern performance.
Conventional boilers provide proven durability, larger heating capacity, and straightforward maintenance, making them an excellent fit for high-demand or older hydronic systems. With over 33 years of heating experience across Long Island, NJM provides expert guidance and precise installation for both system types.
Energy-efficient, compact boilers designed to save space while delivering powerful heating performance. Ideal for modern homes seeking reduced fuel costs and advanced system control.
Reliable, durable floor-standing boilers with high heating capacity and long-term dependability — perfect for larger homes or existing hydronic systems.
We evaluate heating load, square footage, and system layout to determine whether a wall-hung or conventional boiler best meets your home’s needs.
Safe, clean removal of outdated or inefficient boilers with full code-compliant disposal and preparation for your new system installation.
What Our Long Island Clients Are Saying...
Kris
I couldn’t recommend Neil enough! From start to finish him and his team were professional, efficient and experienced. We had a job pulling up rocks and putting top soil down which I know can be a tedious job. We appreciate the work and look
Evelyn Powers
We had an ongoing issue with clogs. My daughter woke up to flooding in her bedroom from her toilet, which was not fun! This was our first time having NJM in our home. Neil was knowledgeable and gave us several options. we chose to have him use the camera to get to the root of the problem. He was able to pinpoint several issues and was able to fix clog and clean out the pipes. Neil and his crew were very professional,
Irene Cheung
I contacted NJM Mechanical because I didn’t have hot water anywhere in my house. Neil was able to diagnose the issue and get to work. My navien tankless water heater is only a year old and still under warranty. Instead of waiting on Navien to send the part so the issue can be corrected, Neil went out, found the part, purchased it,
William Lo
Great experience. Neil came out and took the time to explain everything thoroughly. He was able to fix all the errors on our Navien and have it back up and running. Following up a week later. Neil and Mike came out to redo the Navien system for proper instillation.
Unfortunatley, after there was a gas leak with our Navien system. Neil was able to get
James Farnworth
Neil from NJM was able to get my ac system up and running when others could not. He was honest with me right from the beginning and all costs were discussed before repairs began. Additionally, Neil spent time explaining to me how my system operates and the things I could do to help it run at peak performance. It was quite refreshing to experience a service technician who demonstrated the uppermost
Raul Chardon
Honest professional full of knowledge not BS. Takes pride in his craft and is a master of it.
Expert Boiler Services Backed
by Over 33 Years of Experience
Why Choose NJM for Your Boiler Installation or Heating Project
We are fully licensed and insured to install, repair, replace, and maintain all major boiler systems.
We are fully licensed and insured to install, repair, replace, and maintain all major boiler systems.
We install and upgrade boilers designed to reduce energy consumption and improve heating performance.
Our technicians follow strict safety and building standards for all boiler and mechanical work.
Rapid-response repair services available day or night when your boiler fails unexpectedly.
Decades of professional experience mean we install fixtures, piping, and full systems correctly the first time — with workmanship that lasts.
No hidden charges or surprise add-ons. You’ll receive a clear estimate outlining exactly what your installation includes.