The Bosch 13H Instant Gas Hot Water System (TF325-8G) is a compact and efficient continuous flow unit that utilises HydroPower ignition technology—requiring no electricity to operate. It is powered by water flow, making it ideal for energy-conscious homes and off-grid installations. With a delivery rate of 13 litres per minute at a 25°C temperature rise, it offers a reliable hot water solution for smaller households. This external system is equipped with advanced safety features and delivers hot water only when needed, reducing energy waste.

FEATURES:

Heating Method:
Gas burner with HydroPower ignition – no mains power required

Hot Water Supply:
Continuous flow – heats water on demand

Recovery Time:
Instantaneous – water is heated as it flows through the system

Installation Location:
Outdoor wall-mounted installation only

Water Pressure:

• Maximum (static): 800 kPa
• Minimum operating: 40 kPa
• Minimum constant pressure for minimum flow: 100 kPa
• Minimum constant pressure for maximum flow: 140 kPa

Energy Efficiency:
N/A – Star rating not specified

Operating Costs:
Economical operation as it heats only when required; no pilot light or standby energy use

Best for:

• Small to medium-sized households
• Homes with 1 bathroom
• Properties without 240V power (e.g. rural or off-grid locations)

Number of Bathrooms and People (Capacity):

• 1 bathroom
• Suitable for 2–3 people depending on climate and usage

   

Additional features:

• No electrical connection required – ideal for areas without power
• Hydrogenerator-powered ignition: ignites when water flows
• LED status indicators (green = flame detected, red = fault)
• Adjustable gas and water flow controls for fine temperature regulation
• Water filter included at cold water inlet to prevent internal blockage
• Not suitable for commercial, recirculation, or solar booster use
• Requires servicing every 2 years to maintain performance
• Built-in flame failure detection and overtemperature protection

A sturdy, pilot-ignition hot water heater, the Bosch 10P Instant Gas Hot Water System is built to last and provide consistent, effective hot water delivery. It provides cost-conscious households with a useful solution without sacrificing quality because it is specifically designed for external installation. This model, which boasts Bosch’s dedication to long-lasting construction, provides instant hot water and has a small footprint, guaranteeing optimal efficiency for homes with just one bathroom.

FEATURES:

Heating Method: Pilot ignition system

Hot Water Supply: Continuous flow, heats water only as required

Recovery Time: Instantaneous (continuous flow system)

Installation Location: External wall installation only

Water Pressure:

• Minimum Inlet Water Pressure: 30 kPa
• Maximum Inlet Water Pressure: 1200 kPa

Energy Efficiency: 4.6 Star Rating

Operating Costs: Economical running costs due to efficient pilot ignition and instantaneous heating

Best for:

• Single-bathroom households
• Budget-conscious consumers requiring compact and reliable hot water delivery

Additional features:

• Compact design – smaller footprint compared to traditional storage heaters
• Environmentally friendly – only heats water on demand, reducing gas consumption
• External installation, perfect for space-saving outdoor setups
• Continuous hot water supply at the turn of a tap
• Standing pilot light maintained throughout the unit’s life

For medium to large homes, the durable and energy-efficient continuous flow water heater perfect for the job is the Bosch 16H Instant Gas Hot Water System. Its HydroPower ignition system provides hot water on demand with minimal environmental impact, eliminating the need for a power point or pilot light. Designed for outdoor installation, this unit offers a reliable hot water solution ideal for daily use, combining durability, simplicity, and excellent performance.

FEATURES:

Heating Method: Gas-powered without pilot light or electrical connection using Bosch-exclusive HydroPower ignition.

Hot Water Supply: 25°C temperature rise results in up to 16 litters per minute.

Recovery Time: Instantaneous – supplies always hot water as required.

Installation Location: Outside wall-mounted exclusively

Water Pressure: Runs between 800 kPa (maximum) and 50 kPa (minium).

Energy Efficiency: 5.0 Star energy rating.

Operating Costs: Extremely low—just heats water as needed, so reducing energy usage.

Best For: Perfect for medium to large homes seeking a high-output, energy-efficient hot water system.

Additional Features:

• Driven by water flow via a hydro generator, additional features include built-in flame failure and over-temperature safety devices without an electrical connection.
• 3.5 L/min is the low minimum operating water flow
• Ideal for use with natural gas or LPG.
• Built with Australian conditions in mind, trusted by plumbers for more than thirty years; compatible with Bosch Exogel Valve for mild frost protection
• LED indicators for system diagnostics

Bosch 16P Instant Gas Hot Water System

Designed for external installation, the dependable, pilot-ignition continuous flow water heater Bosch 16P Instant Gas Hot Water System for homes looking for consistent hot water across several bathrooms, delivers up to 16 litres per minute. Mainly where natural gas or LPG is preferred, the 16P is a great solution for homes in both urban and rural environments since it has strong gas efficiency and no electrical connection needed. Among its simplicity, robustness, and ease of handling high-pressure water systems, the Bosch 16P is outstanding.

FEATURES:

Heating Method: Gas with standing pilot ignition system

Hot Water Supply: 16 L/min at a 25°C temperature rise

Recovery Time: Continuous flow system instantaneous

Installation Location: External only (outdoor wall-mounted)

Water Pressure: Minimum inlet pressure: 50 kPa. Maximum inlet pressure: 1200 kPa

Energy Efficiency: 4.3 Star energy rating

Operating Costs: Low running costs; heats water only as needed

Best for: Ideal for homes needing continuous hot water and independent of electrical power

Number of Bathrooms: Suitable for homes with 1 to 2 bathrooms.

Additional Features:

• Suitable for both Natural Gas and LPG models, the standing pilot light ensures dependable ignition even during power outages 
• Designed for high-pressure environments, making it ideal for modern plumbing systems 
• Integrated safety features include thermocouple and over-temperature protection
• Designed to be installed near the most frequently used outlets for faster hot water access
• Contains an optional Exogel valve for mild frost protection
• Requires a low minimum flow rate (3.2 L/min) to activate the unit
• Durable Bosch engineering with over 30 years of proven performance in Australia

The Bosch 10H Instant Gas Hot Water System is a reliable and energy-efficient external hot water unit, ideal for small households. 

With its HydroPower ignition, this unit runs without needing electricity or batteries, as it uses water flow to generate the power required to start the burner. 

Its compact design and consistent performance make the 10H a great choice in areas where natural gas or LPG is available. It’s the go-to option for homes looking for dependable hot water with low running costs.

FEATURES:

Heating Method: Continuous-flow gas with HydroPower ignition—no need for electrical connections or a standing pilot.

Hot Water Supply: Instantaneous; heats water only when a hot tap is turned on.

Recovery Time: No recovery time required—delivers hot water on demand.

Installation Location: Designed for external wall-mounted installation only.

Water Pressure: Operates within a range of 30 kPa (minimum) to 800 kPa (maximum static). A constant pressure of at least 60 kPa is needed for maximum flow.

Energy Efficiency: Rated at 5.3 stars for outstanding gas efficiency.

Operating Costs: Very economical, as it heats water only when necessary and has no electrical consumption.

Best for: Ideal for smaller homes, apartments, or secondary dwellings with low to moderate hot water demand.

Additional Features:

– No batteries or electrical connections needed 

– Perfect for remote locations without power access 

– Comes with a built-in water filter 

– Includes a flame rod safety device and overtemperature protection 

– Operates efficiently with a low flow rate starting from 3.2–4.0 L/min 

– Optional frost protection available with the Exogel Valve 

– Supported by Bosch’s well-regarded reputation for quality and service