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, P-K 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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