The Instano range consists of three instantaneous water heaters with a capacity of 27.0 kW to 60.9 kW. This appliance can meet a load profile of XL to XXL and has an ErP efficiency of 88% to 92%. The compact dimensions and low weight make it the perfect hot water solution for application in larger households.


  • Maximum working pressure 10 bar
  • Stainless steel heat exchangers
  • Low NOx
  • Maximum set point 75°C
  • Equipped with a LCD display with stand-by option
  • Electronic ignition
  • Room-sealed product
  • Suitable for natural gas and propane


  • Energy efficient, modulating burner
  • High-efficiency 107% (gross)
  • Compact design

Where to buy


Quick Download

Below you will find a download to Autocad drawings per unit.

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Below you can download the energy label of each water heater. This label shows the efficiency per device.

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Please find below flue parts information per unit. Each document contains all necessary information on configuration, parts and assembly.

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Below you will find Instruction Manuals with information about the installation, commissioning and maintenance of your installation.

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Please find below all information on the parts and accessories that are available for each water heater.

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Here you can download the product cards per device.

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Below you can download our spec sheets. These sheets contain all possible information regarding technical specifications such as the load profile, input, draw-off capacity,  dimensions and installation options.

Ecodesign Specifications

Instano Capacity Profile Energy efficiency class Energy efficiency
25 XL A 90%
35 XXL A 92%
60 XXL A 88%


Anyone who makes vital high-end equipment and considers user comfort a top priority must be able to guarantee and support the flawless operation of its products. Customer satisfaction throughout the life of the product. AO Smith offers an adequate service package: sizing, commissioning, service and maintenance.


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