Hot Water Heating


  • This field is for validation purposes and should be left unchanged.

P-K THERMIFIC VELOX W Series Direct Water Heaters

Models: W700 (700 MBTU), W1000 (1000 MBTU), W1500 (1500 MBTU), W1700 (1700 MBTU), W2000 (2000 MBTU)

When it comes to small size, but big output, the P-K THERMIFIC VELOX® Direct Fired Water Heater is hard to beat — even the largest model can be moved through a 30″ doorway!

Its state-of-the-art vertical design, utilizing a radial-fired, fan-assisted burner and heat exchanger, is the key to efficient performance. This design enables the P-K THERMIFIC VELOX® W Series Direct Water Heater to operate at a CSA certified thermal efficiency of 85% as a Category I non-positive, non-condensing appliance.

Whether purchased as an individual boiler or with a storage package, the P-K THERMIFIC VELOX® W Series boiler is certified for installation on combustible floors. In either case, there are only five connections for easy installation. Multiple units can be installed in tandem in small areas to meet virtually any heating load, so it is ideal for retrofitting.


  • Optional storage tank can complete the package; contact us for more information
  • Compact/modular design allows multiple units to be installed in tandem
  • Vertical burner/heat exchanger design
  • Unique integral finned copper water tubes
  • High heat transfer ratios
  • Lo-Hi-Lo operating controls on some models
  • Propane option
  • Sealed combustion option
  • Operates quietly, below OSHA standards
  • CSA certified and ASME approved
  • 5-10-5 Warranty


  • One of the highest achievable thermal efficiency levels for non-condensing, gas-fired boiler
  • Does not produce highly corrosive condensate in either the heat exchanger or vent system when operated at recommended temperatures
  • Needs only five connections to install
  • Low installation costs
  • Low maintenance
  • Quick return on investment
  • Quiet operation
  • Certified for installation on combustible floors
  • Compact to clear 30″ doorway
  • Sealed combustion eliminates large air louvers and permits boiler installation in a negative pressure environment or adjacent to refrigerants
  • Burner can be quickly and easily removed from the exchanger for cleaning or inspection
  • High heat transfer ratio and fast response to load requirements
  • Easy access, ideal for retrofits in inaccessible locations
  • Factory authorized start-up service
  • Fast delivery
  • Fire tested before shipment

For more information about this or any of our other products, please contact us or click here to find your authorized Harsco Industrial Patterson-Kelley representative.

Rep Menu