CONTACT US

Smart Cylinder™

Downloads
Gallery

Overview

Discontinued

This revolutionary hot water cylinder learns a households behaviour and only heats what’s needed, saving you on water heating!

What is it?
The way that a traditional electric hot water cylinder works means that you are paying to heat all of the water in your cylinder 24 hours a day, 7 days a week, 52 weeks of the year. The Rinnai Smart Cylinder™ has a smart thermostat which learns the pattern of hot water use, and then only heats the water when it knows it’s going to be needed.

It’s easy to use too with an LCD control pad, simply set and forget.

Read More

Product Details

Suitable for residential indoor water heating applications—mains and low pressure systems.

A Smart cylinder is ideal for households that have a regular pattern of hot water use, as consistency is key. Also there is some interaction needed with the Smart controller, which is mounted on the cylinder. Easy access to the cylinder and controller is important.

Smart Cylinders are not suitable as a pool or spa heater, or for connection to an open loop solar or hot water heat pump system.

Water quality
Rinnai cylinders are made to suit most NZ council water supplies. However some water supplies can have a detrimental effect on the cylinder, its operation and life expectancy. Stainless steel cylinders ARE NOT suitable for bore or tank water.

Water supplies with a high level of calcium carbonate (hard water) can cause scaling on hot surfaces. We recommend a water temperature of no more than 65 ºC to minimise scale build-up. Scale reducing or water softening devices should be considered in hard water areas. The cylinder is not guaranteed against damage due to scaling.

Technical Specifications

Codes MP stainless steel

  • 135 L – MS13555030S
  • 180 L – MS18055030S
  • 250 L – MS25055030S

Codes MP enamel

  • 135 L – ME13548830S
  • 180 L – ME18048830S
  • 250 L – ME25059030S

Codes LP stainless steel

  • 135 L – LS13555030S
  • 180 L – LS18055030S
  • 250 L – LS25055030S

Connections

Hot and cold water connections ¾ ” (20 mm)

Element

3 kW (all sizes) Incoloy 825 alloy sheath element positioned at the bottom of the tank

Max. working pressure

850 kPa (MP enamel, and SS cylinders)
120 kPa (low-medium pressure stainless steel)

Pressure testing

To 15 bar

Thermal insulation

CFC-free polyurethane foam, compliant with MEPS standard

Thermostat

Cotherm iQuaflex 14 A probe thermostat

TPR valve (mains pressure only)

Rating of TPR supplied with cylinder— factory set to 850 kPa and 90 °C.

Cylinder recovery times (theoretical)

Based on a thermostat temp. setting of 60 °C and an incoming water temp. of 15 °C

  • 135 L = 2 hrs 37 mins (3 kW)
  • 180 L = 3 hrs 30 mins (3 kW)
  • 250 L = 4 hrs 51 mins (3 kW)

Market release

June 2015
Discontinued May 2025

Energy cost saving references

  1. The savings claim is verified by results from European tapping tests.
  2. The European efficiency testing standard for a hot water system uses ‘tappings’. Tappings are calls for hot water from the cylinder at various times to simulate real life hot water use.
  3. Actual savings made will depend on the installation although savings of up to 10% are typical.
  4. Savings are influenced by a number of factors including cylinder size, hot water use profile and plumbing system design.
  5. Savings are made by the reduction of heat loss from the cylinder and all of the associated components in the plumbing, including the pipework.

FAQs

Savings are influenced by a number of factors including cylinder size, hot water use profiles and plumbing system design. Savings of up to 10% have been observed.

The savings claim is verified by results from European tapping tests. The European efficiency testing standard for a hot water system uses “tapping’s”. Tapping”s are calls for hot water from the cylinder at various times to simulate real life hot water use.

There are a few options here:

  • You could put the cylinder onto manual mode, which will result in it working the same way a standard electric hot water cylinder (there will be no savings during this time period) and then revert back to your preferred setting once your guests have left.
  • Alternatively, if you still want to enjoy some savings then you can increase the level of comfort on the controller, which means that the cylinder will produce more hot water while still delivering savings.

From our blog

  • Water Heating

How to Save on Hot Water

Hot water plays a huge role in our everyday lives – from our showers, to washing our dirty dishes, to making our favourite hot drinks

Read Article
  • Water Heating

How to Choose a Hot Water System For Your Home

By far the most efficient way to heat hot water in your home is with natural gas. So the first thing you need to consider

Read Article
  • Water Heating

Why Should I Switch to Mains Water Pressure?

If you’re timing your shower when someone isn’t using the kitchen tap to avoid an unwelcome blast of cold water, it’s likely your hot water

Read Article
SEE MORE ARTICLES

Why Rinnai?

Our stylish and efficient heating and cooling solutions are designed to bring you total home comfort.

FIND OUT MORE

Product Registration

Simply enter the product code and serial number to register a Rinnai product.

REGISTER A PRODUCT
WHERE TO BUY
STOCKISTS
BOOK A SERVICE
SERVICE
DOWNLOADS
DOWNLOAD
Products
Support
Rinnai
Popular Home Heating
Popular Water Heating
TradeSmart