The Useful Of Gas
The Rinnai Infinity range of hot water systems are all run on gas and there are nine different systems within the range to choose from, so there will be one that will suit your water and heating usage. This is not the only set of water heaters that are available to the consumer however they also have solar solutions, electric and heat pumps so there is a little bit of something for everyone and it is entirely up to the customer what it is they wish to have installed in their home.
If the aim of the game is to save the environment then the solar and heat pump water heaters are the ones that are going to leave the smallest carbon footprint and still be able to provide all the hot water that is needed. It all depends on the environment in which the systems are going to be installed. Just because an individual really wants to have solar does not mean that they will be able to, it all depends on the region that they live in, whether they have a reliable amount of sunlight available to them and the position of the house, if there are a lot of trees that shade the house then the solar panels are not going to be of any use. They need to have access to a good portion of the sunlight that is available during the day to heat the water, cutting down trees is not exactly in the interest of the environment so other solutions might need to be looked into.
A heat pump does use some energy but not as much as other systems and if the pump is being installed into an area that has a warm climate most of the year then this is the water heater that will be most beneficial, yes it does use energy to heat the water but compared to other hot water systems the usage is minimal.
Anything but an electrical system is going to lower the carbon footprint and save dollars but there are also half/half options where you can go solar and have gas or electricity as a backup, in case of limited sunlight. The same goes for the hot water pumps and gas systems, they can be made to be run off of electricity in case of failure of the main heating energy. This enables there to be constant hot water without having to worry about being left in the cold, of shivering under freezing showers and having to boil the kettle constantly to get a sink full of hot water to wash the dishes. Which is a tedious time consuming task and has a tendency to lead to burnt hands and fingers and dishes being dropped because they are too hot to pick up. The only way to really make sure you have the right product is to monitor water usage and the environment in which you are located.