Wouldn’t it be great to have an intelligent hot water controller that manages the way you heat your hot water. Where you only heat the hot water when you need it, automatically sterilizes your hot water cylinder to kill off any legionella bacteria. Or when you go away on holiday able to have the cylinder switched off or have the option to BOOST your hot water for when extra guests turn up.

Our proven technology gives households direct energy savings on their hot water power bills. Saving customers money without impacting on their hot water availability. Introducing our break-through technology, the iSmart Hot Water Controller™ an energy hot water saving device that can easily be retrofitted to any hot water cylinder by a qualified electrician. More sophisticated than a timer, the iSmart Controller™ comes with an LCD DisplaySmart™ touch screen. With our user friendly touch screen you can programme when you want to heat up your hot water, plans for period of high use, can be boosted when you’ve got unexpected demand and minimise power use when away on holiday.

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  • Had been looking to control my hot water useage better via a timer but stumbled across the ismart controller so decided to give it a try. I did do a bit of homework on it and concluded it was just what the doctor ordered. Was very pleased to learn that it was exclusively designed and manufactured in New Zealand and they are prepared to warranty it for 3 years and not the standard 1 year like most!  After living with the system for awhile now I'm very happy with how easy it is to use and very informative, and its surprised us  as a family of five how its made us more aware of how we use our hot water without it being restrictive at all. All in all I can highly recommend this product as it does do what it says and is very easy to use!!
    Boyle Family Hawkes Bay
  • We are semi-retired couple and where we can save money on our power bills we try to. We go away alot so therefore don't like to leave the cylinder on.  The ismart controller enables us to safely turn off our cylinder by putting into holiday mode. Also works well with our solar hot water system, so we can programme to heat our hot water during the day when the sun is out. We are saving about $50 per month. We have been very please with the savings since we installed the ismart controller.
    Allen Family, Dunedin
  • Very clever piece of technology, we are making some good savings each month. We are able to manage our water a lot better and saving about $45 a month on our power bills,  has been fantastic energy saving device. Installation was really quick and easy. Our overall experience has been A++
    Colin and Jen, Paihia Northland
  • We have had our Smart Controller installed  for  about 8 months. We are saving about $40 per month with a household of six. We found the colour touch screen very user friendly, we love the Holiday Mode and being able to see how much hot water we have. Would recommend this product to those who want to save on their power bills Many thanks. Paul
    Paul, Lower Hutt Wellington
  • With just the two of us in the house now, we no longer are wasting power on heating our whole cylinder. We are very happy with our savings we are making.  I just wish this technology came out years ago. We feel good also knowing we are supporting a Kiwi made product. 🙂
    Annie, Onehunga Auckland


  • If your power bill is landing you in hot water it might be a swell idea to update your water heating system. The iSmart Kiwi Controller gives you the power to regulate how and when your hot water cylinder goes to work – with clever technology that remembers how much you use and how much you’ll need.
  • Your wallet will thank you and so will your family with an inbuilt setting that automatically eliminates legionella’s disease and keeps your household healthy and happy.
  • This advanced technology ingeniously uses power at off-peak times so you’re not charged an arm and a leg just to wash up after dinner.
ISmart Controller
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Pei Xie
Pei Xie
Great and easy to use system. What’s more the team is extremely helpful! I had a couple of small issues after I-smart controller installed (which were identified latter that were not related to the Ismart system at all) I-smart always responded to my phone calls swiftly and Ella, a very nice and friendly lady came straight away to our house to help. Great product and awesome service!
Ruchi Kang
Ruchi Kang
ISmart controller was installed free at my house during the home health check programme. It's been four months now and I have seen the reduction in power bill by 10%. Really enjoying this winters with warm house without worrying about the power bill ���
Mathew Morrow
Mathew Morrow
Works extremely well, currently saving approx $50/month on the power bill. Could be more some months. Excellent device and service 🙂
Deborah Leanne Vehikite
Deborah Leanne Vehikite
Awesome. Only one month down, but expecting excellent results.
Lisa Young
Lisa Young
So happy with this device, easy to use and it's great that I have control over how much power my hot water cylinder is using.
Stephanie Logopati
Stephanie Logopati
"FREE STUFF" - surely there's a catch? We got our ismart controller through the healthy home check initiative currently available in the Papakura and Takanini area. Well apparently there is no catch. We are a few months into using this savings generator, our savings levels are currently at 45% (2 ad, 2 ch household), because you can track your hot water levels you can make day to day changes to create good money and energy savings. It's easy to use with easy to follow instructions if you somehow get stuck.This is a definite win in my book. Well done on making an innovative product easily accessible. 5 stars 👍
Andrea Lea Pepperell
Andrea Lea Pepperell
The controller is easy to use and we really like having more control over how much hot water we have stored during the day.