Kiwi households use 34 percent of their annual energy on space heating, which comes not only at the cost to your wallet but also at a cost to the environment. Save your dough and the Earth this winter with smart thermostats like ecobee. It uses sensors to save households up to 23 percent in heating and cooling costs, according to an internal analysis. This smart device is Energy Star certified and will also provide energy reports to allow you to understand the energy usage in your home. Being a smart home technology, it will connect to any smart home hub or accessories, making it the most versatile in its category.