CF Endless Series Natural Gas
Continuous flow · Natural gas · 6.2-star energy rating · Wall-mounted · WaterMark approved
The Envirosun® Endless Series is a continuous flow natural gas water heater engineered for efficiency and reliability in Australian homes. With a 6.2-star energy rating, FlameSustain™ technology, and WaterServo precision control, it delivers a constant supply of hot water on demand — without the need for a storage tank. Available in 20L/min and 26L/min models, built to handle high-demand households while reducing energy consumption and running costs.
Key Features
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6.2-star energy rating
Independently rated for gas energy efficiency — reducing energy consumption and lowering running costs.
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Endless hot water on demand
Continuous flow design with no storage tank to run out — hot water whenever you need it.
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FlameSustain™ technology
Maintains stable combustion even under low gas pressure, low water pressure, or high wind conditions.
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Customisable temperature
11 set points from 38°C to 75°C, factory preset at 50°C for safety and comfort.
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WaterServo technology
Minimises water wastage by rapidly delivering hot water and maintaining consistent temperature with precise flow control.
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Advanced safety protection
Dual CPU protection with intelligent self-check system. Guards against gas pressure fluctuations, overheating, accidental flameouts, voltage overcurrent, and burnthrough.
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Anti-freezing protection
Built-in 100W anti-freezing heating capacity protects the unit in cold conditions.
At-a-Glance
| ES20CF-2-NG · ES26CF-2-NG | |
|---|---|
| Gas Type | Natural Gas |
| Suits | 2–4 · 4–6 people |
| Flow rate | 20 L/min · 26 L/min |
| Gas consumption | 160 MJ/h · 195 MJ/h |
| Heat output | 37 kW · 47 kW |
Natural Gas
Range
| Specification | Endless Series Natural Gas | Endless Series Natural Gas |
|---|---|---|
| Model | ES20CF-2-NG | ES26CF-2-NG |
| Gas Type | Natural Gas | Natural Gas |
| Normal Gas Consumption (MJ/h) | 160 | 195 |
| Water Pressure Max. (kPa) | 1,000 | 1,000 |
| Water Pressure Min. (kPa) | 150 | 150 |
| Gas Inlet Pressure (kPa) | 1.13 - 5.0 | 1.13 - 5.0 |
| Test Point Pressure (Pa) | 580 / 150 | 800 / 150 |
| Number of Injectors | 13 | 13 |
| Diameter of Injector (mm) | Ø2.15 | Ø2.15 |
| Burner Control Segment | 7, 2, 4 | 7, 2, 4 |
| Electrical Rating (W) | 48 | 66 |
| Anti-freezing Heating Capacity (W) | 100 | 100 |
| Heat Output (kW) | 37 | 47 |
| Water Heating Capacity at 25°C rise (L/min) | 20 | 26 |
| Water flow rate to activate the water heater (L/min) | 2.3 | 2.3 |
| Water flow rate to keep the water heater running (L/min) | 1.7 | 1.7 |
| Relief Valve Pressure Setting (MPa) | 1.0-1.5 | 1.0-1.5 |
| Ingress Protection Rating (AS 60529) | IPX4 | IPX4 |
| Power Supply | 220~240V/50Hz | 220~240V/50Hz |
| Ignition | Direct without pilot | Direct without pilot |
| Gas Inlet Connection | G¾ | G¾ |
| Water Inlet & Outlet Connection | G¾ | G¾ |
| Net Weight / Gross Weight (kg) | 19.7 / 22.2 | 19.7 / 22.2 |
| Product Dimensions (mm) | 590 × 370 × 210 | 590 × 370 × 210 |
| Package Dimensions (mm) | 712 × 425 × 298 | 712 × 425 × 298 |
| * USE ONLY WITH PROPANE GAS. PROPANE-BUTANE GAS BLENDS (ULPG) ARE NOT SUITABLE FOR THIS MODEL | ||