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Mod Con Boiler

The Mod Con Commercial Boiler from HTP features an intelligent design that delivers hydronic heating at 94% Thermal Efficiency. The high-grade modulating gas burner operates at a 5 to 1 turndown ratio to meet variable heating needs. Quality construction, a small footprint, and convenient features make the Mod Con Boiler ideal for most commercial heating applications.

  • Low energy costs - resulting from an ultra high 94% Thermal Efficiency rating
  • High system efficiency even during low load conditions - the modulating burner operates at a 5 to 1 turndown ratio, matching fuel consumption to demand
  • Enhanced comfort and efficiency - weather responsive outdoor reset controls match the supply temperature to the heating need, preventing overheating
  • Sized to fit most commercial applications - available in three models, ranging from 300,000 to 850,000 BTUs
  • Stainless Steel Construction resulting in light weight package
  • Built-in cascading capability - a built-in sequencer allows up to eight boilers to be linked together, providing increased turndown ratios, built-in redundancy, and a total heating capacity of up to 6,800,000 BTUs.
  • Small footprint - a sturdy frame and adjustable leveling feet enable units to be double-stacked, making it possible to fit a high output heating system within a small space
  • Optimum serviceability - a removable front cover provides service technicians easy access to components
  • Quality components - an extremely durable 316L stainless steel heat exchanger boasts excellent heat transfer properties and resists corrosion
  • Lightweight construction - facilitates faster and easier field installation
  • Excellent venting options - can use PVC, CPVC, or stainless steel pipe, with vent lines up to 200 feet total equivalent length
  • Convenient control interface - a numeric control panel and LED lights display operational statuses, while an integrated USB connection allows boiler history to be displayed on a computer
  • Eligible for utility company rebates - check www.desireusa.com for state & utility eligibility
Mod Con Specs

Brochure pdf

Installation Manual pdf

Warranty pdf

Specification pdf_fillable

Submittal pdf_fillable

Mod Con Flow Switch Instructions pdf_fillable


Virtual Tour of Mod Con


(you will need autocad to view .igs files & autodesk revit to view .rvt files)

Mod Con 300 .igs
Mod Con 300 .rvt

Mod Con 850 .igs
Mod Con 850 .rvt

Install Drawings

Mod Con Installation Images (.pdf)| Complete Installation Manual (.pdf)


Mod Con Parts Diagrams (.pdf) | Complete Installation Manual (.pdf)



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