DOUBLEMAX 120-9 - Instantaneous Indirect Double-Wall Water Heater

DoubleMax® Indirect Water Heater – Unmatched Safety & Instant Hot Water Performance

High-Performance, Energy-Efficient, and Maintenance-Free

The DoubleMax® indirect water heater from Thermo 2000 combines instantaneous water heating, superior energy transfer, and maximum safety. Featuring a patented double-wall copper heat exchanger, the system provides added protection against cross-contamination while delivering energy savings of up to 30%.

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🔒 Maximum Safety – Double-Wall Copper Heat Exchanger

Unlike conventional water heaters, DoubleMax® is built with an innovative double-wall copper heat exchanger that virtually eliminates the risk of contamination between potable water and the heat transfer liquid. The system includes vented leak ports for fast detection of potential issues, providing 360° visual safety and simplifying preventative maintenance.

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🚿 Instantaneous Domestic Hot Water On Demand

With no storage of stagnant water, the DoubleMax® instantly delivers domestic hot water from 40°F to 140°F in under 7 seconds. Water is heated only when needed, helping eliminate standby losses and reduce energy usage.

Key Benefits:

• Instant hot water production
• Helps prevent Legionella and bacteria buildup
• No need for conventional domestic hot water storage
• Rapid temperature rise of 100°F in under 7 seconds

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🔄 Three-Stage Thermal Transfer for Maximum Efficiency

1. Potable Water Counterflow
   Cold potable water flows from bottom to top through copper coils submerged in heat transfer liquid, capturing thermal energy without direct contact with the transfer fluid for sanitary water delivery.
2. Heat Transfer Liquid Flow
   The heat transfer fluid enters from the top and circulates around the copper coils through a patented injector designed to maximize convection and thermal turbulence.
3. Energy Source Recycle
   After heat exchange, the cooled transfer fluid is directed back to the energy source such as gas, oil, electric, wood, or solar to be reheated in a closed-loop system.

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🔧 Multifunctional Design – More Than Just a Water Heater

With its extra connection ports, DoubleMax® can also serve as:

• A buffer tank to reduce boiler cycling
• A hydraulic separator for improved flow management
• An energy transfer station compatible with multiple heating sources

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🌱 Superior Energy Transfer with Copper – Up to 30% Energy Savings

• Copper conducts heat 17x better than stainless steel.
• Turbulent water flow helps prevent scale buildup and maintain long-term efficiency.
• No sacrificial anode, no corrosion, and no maintenance required.

Result:

• Lower utility bills
• Extended system lifespan
• Compact, high-output solution
• Energy savings up to 30%

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🧪 Hygienic, Residue-Free Water Heating

Unlike traditional storage tanks, DoubleMax® does not accumulate sediment or bacteria. The instant heating process and turbulent flow help prevent Legionella proliferation while delivering fresh domestic hot water.

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🔥 Compatible with All Thermal Energy Sources

DoubleMax® works with virtually any heating system, including:

• Natural gas
• Propane
• Electricity
• Oil-fired systems
• Biomass and wood boilers
• Solar thermal energy

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🏆 Engineered for Durability – Backed by Industry-Leading Warranties

• 30+ year lifespan with proper installation
• 15-year residential warranty on reservoir and copper coils
• 10-year commercial warranty on reservoir and copper coils
• 2-year warranty on mechanical parts
• 2" HFC-free polyurethane insulation for maximum heat retention
• Adjustable legs for easier installation

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📊 Standard Features & Connections

1. Heating supply
2. Heating return
3. Domestic cold water inlet
4. Domestic hot water outlet
5. Pressure relief valve
6. Temperature & pressure indicator
7. Drain valve
8. Immersion well
9. Automatic air vent
10. Adjustable support legs
11. Auxiliary connection ports
12. 2" HFC-free insulation

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✅ Why Choose the Thermo 2000 DoubleMax®?

• Instant, on-demand domestic hot water
• Maintenance-free operation
• Safe, double-wall copper technology
• Ultra-efficient energy transfer
• Small footprint with high performance
• Compatible with multiple heating sources
• Proven durability across North American installations

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Get the best of both worlds: unmatched safety and exceptional energy performance.
Upgrade to the Thermo 2000 DoubleMax® Indirect Water Heater.

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Warranty

• 15-Year Residential Warranty: Reservoir and copper coils
• 10-Year Commercial Warranty: Reservoir and copper coils
• 2-Year Warranty: Mechanical parts

Technical Documents

• DoubleMax® Brochure
• DoubleMax® Manual
• DoubleMax® Specifications
• DoubleMax® Performance Table
• Commercial Sizing Guide
• Residential Sizing Guide