Hot water is one of the essentials in your daily life. You may not even like to think of what would happen on a day when you turn on the shower faucet to hot, but there is no hot water coming. So, if you are throwing out your old water heater, and excited at the prospect of getting home a new one, it’s time you considered buying a whole-house tankless water heater.

These units offer you lower operating costs and many years of constant hot water supply. With traditional tank water heaters, you tend to pay more on your electricity bills, because these units tend to keep hot water at hand. But tankless units heat water as and when required. SO, you save money on your utility bills. These units occupy less space because of their compact size; they can be fitted under the kitchen sink; inside a cabinet or anywhere else when space comes at a premium.

Considerations When Buying A Whole-House Tankless Water Heater

There are two types of tankless water heaters: on-demand or point of use and whole-house units. Whole house units are larger in size than point of use and have the capacity to heat water for supply to more than one water supply points like the kitchen sink, dishwasher, and shower faucets in two bathrooms. This makes a whole house tankless water heater a more energy efficient way to heat water. That being said, it’s also important to understand that a tankless unit isn’t energy efficient for everyone. For ex: if you live in a cold climate, where the ground water temperature is very low, your tankless water heater will require more fuel – electricity or gas – to heat the water, thus leading to higher utility bills.

Therefore, depending on the temperature of ground water in your area, you will have to decide on the fuel type. This is an important decision and must be taken with care and complete understanding. So what do you need to consider getting it right?

1.    Do you want an electric, gas, propane, or solar water heater?
2.    What types of tankless water heaters are available in your area based on the fuels?
3.    Does the whole house tankless water heater you want to install, confirm to the local building, electrical or gas codes, besides being compatible in your home?
4.    What is the quantity of hot water you need on a day to day basis?
5.    What is the temperature of ground water in your area?

Most whole-house tankless units are designed to ensure enough supply of water to 2-3 bathrooms besides other uses. But it wouldn’t hurt to ask the specifics on capacity. While electric units are more economical than gas; they may not be the most efficient as gas/liquid propane are readily available almost everywhere in the U.S. However, if you will be installing a gas tankless water heater, you will need to make adequate arrangements for ventilation.

Finally, it must be said that despite the fact that the cost of installing a whole house tankless water heater by an expert may be more initially, the unit will pay for itself quickly, due to its lower operation costs. Also, you mustn’t forget that a tankless unit has a longer lifespan as compare with a storage unit, thus making it a solid investment!

Top Whole House Tankless Water Heater Models

Paloma Tankless Water Heater (PTG74PVN) Indoor, Natural Gas
Price: $1,129.00

Unit Features

1.    Small size
2.    Electronic ignition
3.    Remote control thermostat


1.    Natural gas powered
2.    7.4 gpm at a 45ºF temperature rise
3.    Electronic ignition increases efficiency
4.    Thermostat remote controlled
5.    Digital temperature display
6.    Built-in electric blower to push exhaust gas outside
7.    Low NOx Burner is environmentally friendly
8.    5-years limited period warranty on parts and 12-years on heat exchanger

Rinnai R75LSiN Natural Gas Tankless Water Heater
Price: $898.98

Unit Features

1.    Plenty of hot water flow
2.    Commercial-grade heating element
3.    Energy Star compliant


1.    Top selling and performing unit based on price and fuel (natural gas)
2.    Plenty of hot water for 2-3 bathrooms
3.    Easy to install
4.    Heavy duty heating element
5.    5-years limited period warranty on parts & labor and 12-years on heat exchanger
6.    Also available in liquid propane

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