Raypak Provides a complete line of finned copper tube and stainless steel boilers and water heaters available today.

Raypak Offers a Variety of Products Producing Different Thermal Efficiencies:

• Atmospheric: 82%

• Fan Assisted: 84% – 87%

• Condensing: 96%+


XTherm® Condensing Water Heaters, 1,000,000 – 4,000,000 BTU Input The proven XTherm – vertical modulating condensing heater in sizes to 2000MBTU. XTherm combines time-honored high-recovery copper fin technology with cutting edge control and combustion advancements. The installer and building owner enjoy broad installation flexibility, easy commissioning, optimum seasonal efficiency, and long term reliability. Remarkably small footprint saves space for those cramped retrofit projects. Built to last, with industrial grade construction and user friendly serviceability.

Extreme burner turn down produces up to 99% efficiency at low fire when it’s most needed. Meets even 2012 LoNOx standards. Now is the time to take a closer look at Raypak’s XTherm. XTherm products take their jobs seriously. On the outside the muscular powder coated steel cabinet provides clean proportions with a strong, unrivaled weather-resistant design. A look on the inside reveals the XTherm’s hybrid heat exchanger system design. Our vertically stacked and robust copper main heat exchanger delivers maximum non-condensing efficiency that works seamlessly with our state-of-the-art-stainless steel commercial-grade condensing heat exchanger. Maximum synergy is maintained throughout the complete XTherm heat exchange system with Raypak’s proven Cold Water Protection System, a proven design approach that ensures the XTherm is built for even the longest days of work, while saving the maximum amount of energy every time it is used.


• VERSA IC® control package with built-in outdoor reset function.
• Complete cabinet protects all controls and wiring.
• Tough rust-resistant powder coat finish.
• Easy to service – removable air filter.
• Certified for PVC, CPVC, Polypropylene or stainless vent materials.
• Suitable for altitudes up to 10,000 ft. (derate may apply).

• Electronic modulating gas valve and burner, up to 5:1 turndown.
• Certified under SCAQMD Rule 1146.2. Meets all Low NOx regulations.
• All models are equipped with 316L welded stainless steel heat exchanger and copper plumbing. ASME Section IV constructed and stamped. National Board Registered AB 1953 low lead compliant.

• Built-in cascade function for up to 4 boilers.
• 94% Efficiency Condensing, Cat IV venting required (up to 99% at part/load).
• 0-10 VDC BMS Interface (setpoint or direct drive).
• All models indoor/outdoor construction.

• Small footprint, less than 9-1/2 square feet.
• Top side water connections – allows side by side installation.
• On-board diagnostic center, English, no codes.
• Available for natural gas or propane.

• Multiple pump outputs – Boiler Pump, System Pump, Indirect Pump.
• Spark ignition with remote flame sensor.
• Supports inlet water temperature down to 50F.
• Whisper quiet operation.


MVB® (Modulating Vertical Hydronic Boilers) 500,000 – 4,000,000 BTUH Input Time-honored technologies unite with cutting-edge advancements in Raypak’s MVB modulating vertical boiler. Small space is no longer a problem, and our compact design fits through a 32” door opening to make it the perfect choice for those hard-to-reach retrofit projects. The MVB is built to last, from the structural steel base to the stainless steel flue wrapper. The built-in VERSA IC® Integrated Control platform precisely tracks the heating load to eliminate costly overshooting, and the 7:1 turndown ensures high efficiency throughout the firing rate and actually increases efficiency during part load, right when you want it.

• 86.2% Thermal Efficiency at Full Rate; Up to 88.4% at Part Load.
• Positive vent pressure, Condensing Appliance. Cat IV Vent Required.
• Cast-Iron Headers with Copper Finned-Tube Heat Exchanger standard. Brass Headers and Cupro-Nickel tubes available as options. ASME Section IV constructed and stamped, National Board registered.
• CSA Low-Lead certified, less than 0.25% Lead.
• Certified to ANSI Z21.13.
• Minimum Inlet Water Temperature: 120°F.
• Maximum Operable Outlet Water Temperature: 235°F.
• Electronic Modulation, up to 7:1 Turndown.
• VERSA IC® Control Package with Built-In Outdoor Reset Function and LCD Display, Including System Sensor, Indirect Sensor & Indirect Supply Sensor.
• Status Display Lights.
• Cascade Control of up to 4 units, no external sequencer required.
• Diagnostics Center with History, English, no codes.

• Modbus RTU BMS port (RS485).
• 0-10 VDC BMS Interface (Setpoint or Direct Drive).
• All models indoor/outdoor construction.
• Certified under SCAQMD Rule 1146.2. Meets all Low NOx regulations.
• Engineered with precisely matched system components.
• Smallest installed footprint (5.4 square feet) design fits tight spaces and easily replaces larger boilers.
• 100% Factory Fire Tested.
• Complete cabinet protects all controls and wiring. Tough, rust-resistant powder-coat finish.
• Suitable for altitudes up to 10,000 ft. (derate above 2,000 ft.).
• No boiler condensate drain required (proprietary design)
• Available for natural gas or propane.
• Integral Combustion Air Filter (MERV8).
• Multiple Pump Outputs – Boiler Pump, System Pump, Indirect Pump.
• Whisper-Quiet Operation.


• Hi Delta® Hydronic Boiler 300,000 – 2,300,000 BTUH Input • All models indoor/outdoor certified.
• 84% Efficiency.
• CAT I vertical venting, CAT III sidewall venting. No extractor required for sidewall applications up to 70ft on room air.
• Patented burner “security blanket” enhances staged combustion, minimizes installation, startup issues, and protects burners from metal fatigue

• Sidewall venting capable. No extractor needed for most applications.
• Ducted combustion air ready. TruSeal® CSA-Certified direct-vent available.
• VERSA IC® Control Package with LCD Display.
• Status Display Lights.
• Cascade control of up to 4 units, no external sequencer required.
• Diagnostics Center with History, English, no codes.

• 105ºF minimum inlet water temperature.
• Cast-iron headers with copper finned tube heat exchanger standard. Brass headers and cupronickel tubes available as options. AB 1953 compliant.
• Modbus RTU BMS port (RS485).
• 0-10 VDC BMS Interface (Setpoint or Direct Drive).
• Certified under SCAQMD Rule 1146.2. Meets all Low NOx regulations. 
• Model 2002BE available for natural gas only. Other models available for natural gas or propane.


Raytherm® Hydronic Boilers, 926-1758

• 24-Volt Controls
• Are totally enclosed for protection. Door is easily removed for inspection and service.
• Floating Return Header
• Immunizes heat exchanger to thermal shock.
• Tube Sheet and “O” Ring Construction
• Eliminates the repair and maintenance problems associated with rolling tubes directly into a casting.

• Sealed corners reduce radiation losses.
• Stainless Steel Burners
• Maintain precise combustion at all firing rates, burn quietly and won’t clog or corrode.
• Slide-out Burner Tray
• Allows easy inspection and service.
• Spark-to-Pilot Ignition
• The most dependable ignition method available.
• Available for Natural Gas or Propane.

• Rugged All-Brass Headers
• Resist corrosion, and are easily removed for inspection or service. AB 1953 compliant.
• Brass Headers with Copper Finned Tube Heat Exchangers

• Single bank, straight through design delivers lowest pressure drop. Integral fins have ten times the heat transfer surface of plain tubes.
• Indoor or Outdoor Installation.
• Gas-lined Cast-iron Headers and Cupro-nickel Tubes Available as Options.

• Corrosion Resistant Steel
• Fittings are brushgalvanized against rust. Heat shields are corrosionresistant steel. Jacket has Polytuf powder coat finish
• Interlocking Refractory Panels

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