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P-K SOLIS® Firetube Condensing Domestic Hot Water Heater
P-K SOLIS® Firetube Condensing Domestic Hot Water Heater
P-K SOLIS® Firetube Condensing Domestic Hot Water Heater

    P-K SOLIS® Firetube Condensing Domestic Hot Water Heater

    Patterson-Kelley is expanding the SOLIS® line to include the all-new SOLIS® W-Series for domestic hot water, alongside its highly efficient condensing boiler models!

    Built to transform both the commercial boiler and domestic hot water heating market, these top-of-the-line, highly efficient condensing firetube units are built with the end user in mind. The advanced design of the SOLIS® heat exchanger ensures superior performance and longevity, whether used for space heating or domestic hot water applications. With an industry leading 10:1 mechanical turndown, these units maximize efficiency by precisely matching demand, reducing energy waste, and optimizing performance.

    Models: SLW1000, SLW1500, SLW2000, SLW2500, and SLW3000

    Features:

    • 1000 – 3000 MBTU (Natural Gas)
    • ASME Section IV HLW Rated
    • Up to 97% thermal efficiency
    • 10:1 mechanical turndown
    • 316 SS tube and tube sheet
    • 304 SS heat exchanger shell
    • Narrow footprint fits through a standard 36” doorway!
    • Hinged and removable doors allow for quick access to firetubes and burner for easy maintenance
    • Zero-clearance capable for side-by-side installation
    • The simple-to-use NURO® touch-screen technology adjusts boiler controls and settings with the swipe of a finger
    • Ultra-low NOx emissions
    Specification
    • Standard 10:1 Mechanical Turndown

      10:1 Turndown Technology Increases Efficiency and Reduces Operating Cost

      Patterson-Kelley has achieved higher turndown with a unique mechanical process that allows the gas valves to control boiler performance without increasing excess air. This results in building flexibility and efficiency.

      This method delivers a 10:1 turndown rate while preserving a high dewpoint, which helps maintain high condensation levels. This higher turndown capability will provide designers the ability to match input to building loads without sacrificing efficiency and reliability.

      Simplified Serviceability

      The heat exchanger is designed to provide simplified and quick annual maintenance. The top of the heat exchanger opens, providing full access to the tubes and burner inside the unit. This makes any maintenance, including cleaning, a quick and cost-effective process.

      NURO® Touch-Screen Control SystemTurndown energy usage

      All of our units are equipped with the most intuitive interface in the industry, the NURO® Touch-Screen Control. Designed to maximize efficiency, the NURO® Control System monitors and modulates the combustion and ignition of the boiler to maintain the desired outlet temperature

    Technical specification
    • Unique ref.p-k-solis-firetube-condensing-domestic-hot-water-heater
    • Product familyWater Heaters
    • Product groupDirect Water Heaters
    • TypeObject (single object)
    • Date of publishing2026-01-07
    • Edition number1
    Related
    • Designed inUnited States
    • Manufactured inUnited States
    Classification
    • BIMobject CategoryHVAC - Water Heaters
    • ETIM CodeEC010868
    • ETIM NameGas-fired water heater
    • Uniclass 2015 CodePr_60_60_96
    • Uniclass 2015 DescriptionWater heaters
    • CSI MasterFormat 2014 Code22 34 30.16
    • CSI MasterFormat 2014 TitleResidential, Direct-Vent, Gas Domestic Water Heaters
    • OmniClass Number23-31 29 00
    • OmniClass TitleHot Water Heaters

    Region availability

    North America Asia
    Anguilla
    South Korea
    Antigua and Barbuda
    Aruba
    Barbados
    Belize
    Bermuda
    British Virgin Islands
    Canada
    Caribbean Netherlands
    Cayman Islands
    Collectivity of Saint Martin
    Costa Rica
    Cuba
    Curaçao
    Dominica
    Dominican Republic
    El Salvador
    Greenland
    Grenada
    Guadeloupe
    Guatemala
    Haiti
    Honduras
    Jamaica
    Martinique
    Mexico
    Montserrat
    Nicaragua
    Panama
    Puerto Rico
    Saint Kitts and Nevis
    Saint Lucia
    Saint Pierre and Miquelon
    Saint Vincent and the Grenadines
    Saint-Barthélemy
    Sint Maarten
    The Bahamas
    Trinidad and Tobago
    Turks and Caicos Islands
    U.S. Virgin Islands
    United States
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