Outdoor Solutions

Outdoor Solutions

Patterson-Kelley provides outdoor solutions to safely and efficiently mitigate space restraints and allows outdoor placement of equipment.

Created with space constraints in mind, Patterson-Kelley has made its industry-trusted solutions available for outdoor use. Whether it is on top of the penthouse or installed on the ground outside, PK outdoor solutions can withstand the elements.

The MACH and MODU-FIRE units are available as easy to order bundles to take PK Solutions to the areas that best suit your needs and the STORM is available as a self-contained outdoor unit, direct from the factory!

To learn more about our solutions, please contact your local representative.

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The P-K STORM™ water-tube boiler is considered the greatest challenge to fire-tube technology by industry experts. This highly efficient condensing boiler is designed to provide long-term savings in energy cost. The P-K STORM™ is AHRI Certified at 97.1% thermal efficiency with 10:1 mechanical turndown.


Outdoor standard models are available direct from our facility.



  • 1250-2000 MBTU
  • Up to 97% thermal efficiency
  • 316L Stainless steel coil ensures maximum corrosive resistance and durability
  • Full modulation burner with up to 10:1 mechanical turndown
  • Cabinet and heat exchanger design reduce repair and maintenance costs
  •  Outdoor Capabilities
  • Variable speed combustion air blower
  • Certified at 3.5 inch Water Column minimum gas pressure
  • Low pressure drops across the unit
  • The compartmentalized design produces efficiency of heat transfer in each section

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An ideal choice for a wide variety of commercial and industrial building applications, including new construction as well as retrofit projects.




Outdoor bundled conversion capabilities on existing models.



  • Actual thermal efficiency up to 99%
  • All-purpose boiler suitable for condensing and non-condensing systems
  • Revolutionary new, fully independent cast sectional heat exchanger
  • Unique aluminum alloy resists corrosive condensate
  • New boiler room layouts and control methods
  • Certified low NOx performance
  • Low water-side pressure drop
  • Full modulation burner with 5:1 turndown
    • 10:1 Mechanical turndown available on Natural Gas (NG) models C750, C900, C1050, C1500, C2000
  • Variable speed combustion air blower
  • Automatically compensates for changes in air temperature and pressure
  • Certified at 3.5 inch Water Column minimum gas pressure
  • Optional outdoor, roof, and dual fuel models

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A full modulation design that changes both fuel and air at a constant ratio to match boiler output to actual heat demand.





Outdoor bundled conversion capabilities on existing models.



  • Simplified, low cost installation
  • Clean, efficient combustion across entire firing range of the boiler
  • Maximum small load efficiencies
  • Captures up to $0.85 of every fuel dollar as comfort heat
  • Perfect part-load performer
  • Easy to inspect and maintain; can be disassembled and reassembled in minutes
  • Fire tested before shipment
  • 5-Year Warranty

Contact us to learn more about the Patterson-Kelley difference.

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