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AquaStar Tankless Water Heater Questions and Answers

Questions and answers collected on this site about AquaStar Tankless Water Heater Questions and Answers.

AquaStar water heaters FAQ Page

General and Specific information on AquaStar tankless water heaters.

Please select the topic below or just page through this page to see all the topics. Information referred to on this FAQ page can be found in more detail on specific product pages. How much money can I save with a tankless water heater? Why does an AquaStar tankless water heater cost more than a storage tank? How can I size a unit for my application? Are the AquaStars tankless water heaters approved for mobile homes? How much will an installation cost of a tankless water heater? Can tankless water heaters be installed anywhere? Who would install the unit? What are the venting and combustion air requirements for tankless water heaters? How much hot water can I get at any one time? How many gallons per minute (gpm) are used by a shower, a sink, a bathtub, etc...? What water temperatures are common in a home? What happens when I increase or decrease the flow rate? Are there limits to the flow rates? What happens if two big draws (for example shower + washing machine) are running at the same time using an AquaStar? What do you mean by endless hot water? What is the average ground water temperature and why does it matter? How can the tankless water heater heat water instantly? How long will the AquaStar Tankless Water Heater last? What kind of service do tankless water heaters require? How will hard water affect my AquaStar? What is the warranty? If these units are superior to tanks, why haven't I heard about them before?

  • How much money can I save with a tankless water heater?
  • Why does an AquaStar Tankless Water Heater cost more than a storage tank?
  • How can I size a unit for my application?
  • Are the AquaStars tankless water heaters approved for mobile homes?

INSTALLATION

  • How much will an installation cost?
  • Can tankless water heaters be installed anywhere?
  • Who would install the unit?
  • What are the venting and combustion air requirements?
  • How much hot water can I get at any one time?
  • How many gallons per minute (gpm) are used by a shower, a sink, a bathtub, etc...?
  • What water temperatures are common in a home?
  • What happens when I increase or decrease the flow rate?
  • Are there limits to the flow rates?
  • What happens if two big draws (for example shower + washing machine)

The temperature will remain constant but the flow will decrease. The decrease in flow will be equal if the outlets are the same distance from the AquaStar and if the outlets have the same flow rate. If one outlet is further than the other from the AquaStar, the decrease will be most noticeable at the further outlet. If one outlet has a greater flow (bathtub compared to a sink, for example), the flow at the bathtub will not experience as much decrease as the faucet since water runs the path of least resistance and the tub's spigot is larger than the sink's.

What do you mean by endless hot water?

The hot water at any faucet or outlet will never run out as long as you are calling for hot water. The AquaStar tankless water heater will allow one major flow of hot water at a time. You could run shower after shower, then when finished, run loads of laundry, and then do the dishes, and so on. It is generally fine to run hot water at a sink while someone is taking a shower.

What is the average ground water temperature and why does it matter?

The average ground water temperature is 50-55° F (ground water temperatures vary as little as two to three degrees from summer to winter). Because tankless water heaters operate by increasing the incoming water temperature by a fixed number of degrees (called degree rise), knowledge of the ground water temperature allows you to know what water temperature a tankless water heater will produce.

How can the tankless water heater heat water instantly?

There are very powerful burners located beneath the copper heat exchanger that heat the water as it flows through the numerous feet of copper coils. Copper transfers heat instantly to the water in the coils.

SERVICE AND MAINTENANCE

  • How long will the unit last?
  • What kind of service do tankless water heaters require?
  • How will hard water affect my AquaStar?
  • What is the warranty?

MISCELLANEOUS

  • If these units are superior to tanks, why haven't I heard about them before?

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