Experienced Service for All Hydrotherm Commercial Boiler Models

From compact cast-iron gas boilers to high-capacity modular heating plants, Hydrotherm systems are trusted for their durability and performance in demanding commercial environments. At Choice Mechanical Services, we specialize in maintaining and repairing Hydrotherm equipment across Indianapolis and Central Indiana. Whether you’re troubleshooting a pilot issue, upgrading to modular step-firing efficiency, or planning a new installation, our technicians deliver precise, code-compliant service backed by decades of experience.

Choice Mechanical specializes in HydroTherm commercial boiler installation, repair, and maintenance for businesses across Central Indiana. Our team provides comprehensive mechanical solutions — including commercial HVAC services, industrial piping and plumbing, and customized maintenance agreements — to ensure your HydroTherm boiler systems run safely and efficiently year-round.

Hydrotherm CS300 Gas-Fired Cast Iron Boiler

Ideal for commercial steam systems, the CS300 delivers reliable heat with rugged cast-iron durability. Its compact size and dual piping options make it a strong choice for tight mechanical rooms and low-ceiling installations.

• Natural or propane gas-fired
• BTU Range: 400,000 – 1,100,000
• Compact cast-iron section design
• Left or right-hand piping configuration
• Flexible high-temp seals reduce install time
• Front access flue cleanouts for easy maintenance

Hydrotherm KN Series Boiler

The KN Series offers high efficiency and low emissions with the trusted longevity of cast-iron construction. Ideal for facilities that want condensing performance without sacrificing durability.

• Gas-fired condensing design
• Modulating sealed combustion
• Cast iron heat exchanger with copper boiler efficiency
• Low NOx emissions
• Compact footprint fits through doorways
• Quiet ceramic burner

Hydrotherm MR Gas-Fired Boiler

The MR Series features modular gas-fired hydronic heating for large commercial spaces. Its independent self-contained modules offer exceptional scalability and step-firing energy savings.

• BTU Input: 360,000 – 2,400,000+
• Independent boiler modules under one extended jacket
• Ideal for large space and water heating demands
• Step-fired operation based on heating load
• Modular banks can be side-by-side or back-to-back

Hydrotherm MG Gas-Fired Boiler

Engineered for reliability, the MG Series includes power burners and electronic flame safeguard systems for dependable operation and long service life in high-demand applications.

• Quiet, blower-driven power gas burner
• Electronic flame safeguard system
• Heavy-duty cast-iron construction
• Corrosion and scale resistant
• Compact modular footprint

Hydrotherm VGAM Gas-Fired Boiler

The VGAM series provides vertical, fully-assembled modular steam boilers for high-output commercial needs. Built to last with cast-iron exchangers and multiple sizing options.

• BTU Range: 500,000 – 2,400,000
• Vertical cast-iron heat exchanger design
• Available with standing or intermittent pilot
• Heavy-duty, corrosion-resistant build
• Factory-assembled for fast installation

Hydrotherm Oil-Fired Modular Boilers

Built for heavy-duty hydronic heating, these oil-fired modular systems provide large-volume heating with step-firing efficiency and proven cast-iron performance.

• BTU Input: 420,000 – 6,930,000+
• Modular Multi-Temp design with cast-iron domes
• Combustion efficiency over 83%
• Natural draft with flame retention burner
• Insulated steel jacket and low water content
• Supplied with aquastats, relief valves, and draft regulators