When tankless water heaters first came into play approximately a decade ago, they promised many things from easy installation, to a lifespan longer than the conventional storage water heater, continuous hot water, less storage space, and a huge savings on energy costs.  Unfortunately, tankless water heaters were outrageously expensive, and failed to deliver on just about all of its promises, leading most people to stick with their traditional conventional storage water heaters.  Luckily, over the past few years, most of these issues have been solved as the technology has advanced.


When tankless water heaters first came out, installation was a huge costly issue.  Since then, it has improved tremendously and has become pretty easy for people to make the transition from a conventional storage water heater to a tankless water  heater.  Rather than positioning the input and output lines at the bottom of the unit,  the newer models of tankless water heaters have the input and output lines at the top, which mirrors the location of the lines on conventional storage water heaters, making the installation process much easier, and enabling more people to do it themselves rather than hiring a professional, adding to the installation cost.  Another installation issue with tankless water heaters was that most products were not compatible with the traditional 1/2 inch gas lines that most people have.  So in order to get a best tankless water heater, you had to also install new gas lines.  Talk about costly!  Thankfully, most manufacturers of tankless water heaters are designing their products to be compatible with the traditional 1/2 gas line, which is making the product even more appealing to more people.


Another huge problem with the older tankless water heater models was inconsistent water temperatures.  These older models promised to deliver constant hot water on demand, but in reality more often than not delivered nothing but cold water.  For obvious reasons, this dramatically decreased the popularity of tankless water heaters.  In order to address this issue, most manufacturers have started adding a recirculation unit to their products to make sure that the water automatically comes out hot and stays that way as long as needed. 



With older models of tankless water heaters, constant maintenance and upkeep was required.  After the heavy installation costs, you can understand why no one was too happy about this.  With older models of tankless water heaters, the biggest concern with upkeep and maintenance was scale build up.  This was a huge concern because scale build up could decrease efficiency, restrict water flow, and eventually completely damage the entire tankless water heater, which would cause you to have to go through the entire installation process and the cost associated with it all over again. The only fix for this with older models of tankless water heaters was to recommend installing a water softener in homes with hard water.  Of course I have to add this was yet another cost associated with installing a tankless water heater. However, the newer models of tankless water heaters contain isolation valves that make the descaling and routine maintenance much easier. 

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