Thermann 21R Continuous Flow 50C Natural Gas

The Thermann 21R Continuous Flow 50°C Natural Gas system delivers energy-efficient, instantaneous hot water tailored for modern homes. With a high 6.1-star energy rating and Japanese-manufactured internal components, this system ensures consistent hot water supply at a pre-set safe temperature of 50°C, making it ideal for families or households requiring safe, reliable, and efficient performance. Its compact wall-mounted design allows for seamless outdoor installation, and it includes advanced frost protection features.

FEATURES:

Heating Method:
Gas burner with direct electronic ignition

Hot Water Supply:
Continuous flow – instantaneous hot water on demand

Recovery Time:
Instantaneous; no storage tank, heats water as needed

Installation Location:
Outdoor wall-mounted only

Water Pressure:

• Minimum: 200 kPa
• Maximum: 1000 kPa

Energy Efficiency:
6.1 Star energy rating

Operating Costs:
Reduced due to high thermal efficiency and low standby loss; safe 50°C delivery minimizes unnecessary reheating

Best for:

• Homes with 2–3 bathrooms
• Households needing continuous hot water
• Locations requiring pre-set safe temperature output (50°C)

Number of Bathrooms and People (Capacity):

• Suitable for 2–3 outlets
• Delivers 21 L/min at 25°C rise, ideal for 2 bathrooms and up to 4 people

Additional features:

• 50°C factory preset temperature for user safety
• Built-in freeze protection
• Optional temperature controllers available
• Includes water inlet filter for clean operation
• Japanese-manufactured internal components for reliability
• Suitable for installation with water-efficient tapware

Thermann 125L Electric Storage Hot Water System’s commercial-grade enamel and thicker anode make it built to last and provide a consistent hot water supply. The Thermann 125L’s dual-handed connection design, thick foam insulation, and Australian manufacturing quality combine sensibly to offer capacity, efficiency, and convenience for regular home use. For daily residential use, the Thermann 125L provides a useful balance of capacity, efficiency, and convenience thanks to its dual-handed connection design, thick foam insulation, and Australian manufacturing quality.

FEATURES:

Heating Method:
Electric immersion element

Hot Water Supply:
Storage system providing ready-to-use hot water from an insulated tank

Recovery Time:
Dependent on element size; commonly 3.6 kW element – moderate recovery rate

Installation Location:
Can be installed indoors or outdoors

Water Pressure:

• Max inlet pressure (without ECV): 800 kPa
• Max inlet pressure (with ECV): 650 kPa

Energy Efficiency:
N/A – no star rating provided for this electric storage model

Operating Costs:
Low heat loss due to 50 mm thick dense foam insulation; contributes to reduced energy costs

Best for:

• Small to medium families
• Households of 2–3 people with moderate hot water usage

Number of Bathrooms and People (Capacity):

• Suitable for 2–3 people for continuous electric usage

The Thermann 17R Continuous Flow 50°C Natural Gas (NG) hot water system is a compact, highly efficient unit designed for consistent hot water delivery in smaller households. Engineered with performance and reliability in mind, it features Japanese technology to ensure precise temperature control and dependable service. This system saves space and energy perfect for anyone who wants hot water whenever they need it. It is perfect for homes with 1 to 2 bathrooms and provides dependable performance whether you live in the city or the suburbs.

FEATURES:

Heating Method:
Gas (Natural Gas), Continuous Flow

Hot Water Supply:
Continuous, on-demand delivery up to 17L/min @ 25°C rise

Recovery Time:
Instantaneous (no storage tank)

Installation Location:
External wall mount

Water Pressure:
Min: 200 kPa | Max: 1000 kPa

Energy Efficiency:
6.0 Star rating (50°C model)

Operating Costs:
Lower gas consumption at 126 MJ/h (NG) for cost efficiency

Best for:
Small households with 1–2 bathrooms and up to 3 people, especially where space is limited and constant hot water is desired

Number of Bathrooms and People (Capacity):
1–2 bathrooms
Up to 3 people

Additional Features:

• Optional remote controllers for the main and bathroom control
• Optional pipe covers and recess boxes for streamlined installations
• Low-profile unit design
• Suited for use with water-efficient fixtures

Designed for those limited spaces, including offices, small homes, and apartment kitchens, the Thermann 50L Electric Storage Hot Water System provides the simplicity of use, with its “V-Fit” dual-handed plumbing design to allow for flexible installation to fit your needs. This hot water system depends on its solid Australian engineering and low height of just 670mm to provide continuous hot water even in a small space.

FEATURES:

Heating Method: Electric immersion element

Hot Water Supply: Mains pressure

Recovery Time: Not specified

Installation Location: Indoor or outdoor; suitable for tight cupboards

Water Pressure: Maximum inlet pressure of 800 kPa (650 kPa with ECV)

Energy Efficiency: N/A

Operating Costs: Cost-effective for low-demand applications

Best for: Apartments, single-person households, or small offices

Number of Bathrooms and People (Capacity): 1 person – continuous use

Additional Features:

• Compact design for tight installations
• “V-Fit” plumbing configuration for easier access
• Dual-handed inlet/outlet for flexible positioning
• Suitable for replacement of older units in restricted areas
• Available in “appliance white” finish for a cleaner aesthetic

Small homes or areas where hot water needs aren’t particularly high would find great use for the Thermann 80L Electric Storage Hot Water System. Made proudly right here in Australia, this system has top-notch insulation and a tough commercial-grade enamel tank to help keep the water hot and save energy costs. Install it indoors or outdoors; its small form and easy dual-handed inlet/outlet design make it simple. Perfect for people seeking consistent hot water free of effort!

FEATURES:

Heating Method: Electric

Hot Water Supply: Mains pressure, full flow to all outlets

Recovery Time: Moderate – suited to continuous daily use

Installation Location: Indoor or outdoor installation permitted

Water Pressure: Rated for 800 kPa maximum inlet pressure without an ECV (650 kPa with ECV)

Energy Efficiency: N/A

Operating Costs: Reduced running costs due to 50mm dense foam insulation

Best for: Small households with 1–2 people; ideal for units, studios, or low-use applications

Additional Features:

• Dual-handed plumbing connections for ease of installation
• Hard-wearing polymer base, rust-proof
• Compact footprint – suitable for space-restricted areas
• Australian-made with a commercial-grade enamel tank
• Dense insulation for heat retention and energy savings

Thermann 170Ltr Gas Storage Hot Water System – designed to serve medium-sized to large homes with consistent and effective hot water delivery. This 4-star gas storage system guarantees complete mains pressure and a changeable thermostat for control and safety. Offering modern efficiency and convenience, its small footprint and clever design make it the perfect replacement solution for older gas units.

FEATURES:

Heating Method: Gas (Natural Gas or LPG)
Hot Water Supply: Mains pressure continuous supply
Recovery Time: Rapid, with a recovery rate of 146L/hr @ 45°C rise (NG)
Installation Location: Outdoor installation
Water Pressure: Max inlet pressure 1,120 kPa
Energy Efficiency: 4-Star rating
Operating Costs: Moderate, controlled via adjustable thermostat
Best for: Medium to large households upgrading from older gas units
Number of Bathrooms and People (Capacity): 3–5 people 

Additional Features:

• Full mains pressure to all outlets
• Small footprint ideal for direct replacements
• Simple ignition and control system
• Durable enamel tank construction
• Rust-proof polymer base
• Manufactured to Australian standards

Should you be looking for a dependable hot water system, the Thermann 160L Electric Storage Hot Water System is most certainly worth giving some thought. Families who always need hot water will find this to be a great option. It will be with you when most needed, so simplifying those busy mornings! Perfect for medium-sized houses, this system is energy-efficient and supplies hot water just when you need it. Designed in Australia, it has dual-handed plumbing, which makes installation easy. It’s made to last with premium commercial-grade enamel and complete mains pressure performance.

FEATURES:

Heating Method:
Electric storage heating element.

Hot Water Supply:
Mains pressure hot water delivery to all outlets.

Recovery Time:
Not specified directly; typical of electric storage tanks in this size category.

Installation Location:
Indoor or outdoor installations are supported.

Water Pressure:
Maximum inlet pressure without ECV: 800 kPa
Maximum inlet pressure with ECV: 650 kPa.

Energy Efficiency:
N/A

Operating Costs:
Reduced heat loss due to 50 mm dense foam insulation, which helps lower running costs.

Best for:
Medium-sized households requiring efficient and reliable hot water, suited for continuous hot water demand of 2–4 people.

Number of Bathrooms and People (Capacity):

• Suitable for 2 to 4 people under continuous tariff supply.

Additional Features:

• Dual-handed water connections for easier installation
• Commercial-grade enamel lining and thicker sacrificial anode for longer tank life
• Rust-proof polymer base
• Australian-made
• Designed for compatibility with various water conditions in Australia and New Zealand
• Compliant with AS/NZS standards for electrical and plumbing installations

The Thermann 135Ltr Gas Storage Hot Water System delivers reliable, full-flow mains pressure hot water with the efficiency and performance expected of a modern 4-star rated appliance. Designed with upgradeability and energy efficiency in mind, it fits the same footprint as many older units, making it ideal for replacement installations. With a robust vitreous enamel tank, adjustable thermostat, and high first-hour capacity, this system is suitable for medium-sized households seeking both performance and value.

FEATURES:

Heating Method:
Gas burner with pilot ignition and thermostat-controlled temperature setting

Hot Water Supply:
Mains pressure storage – delivers consistent hot water to multiple outlets simultaneously

Recovery Time:
126 L/hr (Natural Gas) at 45°C rise
113 L/hr (LPG) at 45°C rise

Installation Location:
Outdoor installation only

Water Pressure:

• Maximum inlet pressure: 1120 kPa
• Relief valve pressure: 1400 kPa

Energy Efficiency:
4 Star energy rating

Operating Costs:
Efficient combustion and insulation help reduce gas usage and standby heat loss. Adjustable thermostat provides cost control and temperature customization

Best for:

• Medium households
• Homes upgrading from older gas units
• Users who require full mains pressure and reliability

Number of Bathrooms and People (Capacity):

• Ideal for 2–4 people
• Suitable for 1–2 bathrooms

Additional features:

• Compact footprint ideal for direct replacements of older units
• Adjustable thermostat for precise temperature control
• Pilot ignition system with user-friendly access panel
• Complies with AS/NZS safety and performance standards
• Built for Australian conditions – suitable for hard water with optional aluminium anode