Best Indoor & Outdoor Gas Tankless Water Heaters Under $1,000

Water heaters are common fixtures in residential households. There are several types of water heaters. While the purpose of this article is to provide recommendations on tankless gas water heaters, it’s helpful to know the other types of water heaters that exist in the market. Each has their pros and cons.

[Diagram of how Tankless Water Heater works]

Traditional water heaters are most often known as storage water heaters. They consist of a cylindrical container that keeps the water inside continuously hot and ready-to-use. In the US, gas-powered storage heaters are a common fixture used in many residential households.

Tankless water heaters, on the other hand, do not require a storage container. These water heaters, instead, provide hot water on demand. The water gets heated as it flows through the device.

Storage vs. Tankless Water Heaters

So what are the benefits and concerns associated with a tankless water heater? Here are a few to think about.

Energy-efficiency: tankless water heaters are designed to only heat water when needed. This could help you save on utility bills.

Storage limit: there is a limit to the volume of hot water a storage heater can hold at a given time. As a result, you might find yourself facing the inconvenience of suddenly taking a shower in cold water.

Power Requirement: tankless water heaters can’t run without electricity or gas. This can be problematic if you live in area that is vulnerable to power or gas outage.

Faucet Limitation: since water is heated on demand, households with tankless water heaters may have a limit on the no. of faucets that can be used at the same time. This, however, can be resolved by getting multiple heater units.

Factors to Consider

Make sure you consider the following factors when purchasing a water heater.

Water Usage: to avoid phenomenons like the cold water sandwich effect, make sure you get a heater that has the capacity to support the amount of water used at home. Multiple units may be required if the water heater is needed for a large household or commercial property.

Installation Space: tankless water heaters typically do not require a lot of space. Some brands, however, may not connect with existing vent pipes or gas pipes so additional space may be needed to have those fixtures upgraded.

Investment: tankless water heaters may potentially save you more money in the long-run but it does require a larger up-front investment.

Electric vs. Gas: electric heater units are typically cheaper than their gas-powered counterparts. Electric units also don’t require ventilation. Gas units, specifically ones with non-condensing systems, may require complex venting systems.

Hot Water Capacity: gas heaters are capable of delivering more hot water than their electric counterparts. They tend to be a better fit for a larger household that require a high demand of hot water.

Top-Rated Tankless Gas Water Heaters

Here is a list of top-rated tankless gas water heaters for indoor installation.

1. Takagi Indoor Heater, Natural Gas
A BTU of 140,000, 6.6 GPM max flow rate, and an energy factor of 0.81-0.83. Customers mentioned that this device is light and small. It is also straightforward to install compared to other heater units. Provides plenty of hot water, even for a house that has 2 bathrooms.

2. Rheem Direct Vent Condensing Heater
A capacity of 6.4 gal/min at 35-degree rise, indoor direct vent, and a 26 GPM minimum flow rate. Customers stated that this device cranks out hot water like a machine. It may even halve your gas bills if you were previously using a conventional storage heater.

3. Noritz Condensing Indoor Heater
Has the ability to heat up to 6.5 gallons of water per min. This device can be vented using Schedule 40 PVC Pipes. You should be able to install this heater yourself if you have decent handyman skills. Fairly light at 38 pounds.

And some recommendations for those who want to install their heater outdoors.

4. Rheem Tankless Outdoor Heater
Much like the indoor version, this device has a capacity of 6.4 gal/min at 35-degree rise. Also contains a remote control and thermostat for water temperature control. Customers mentioned that very little water is wasted because the water gets heated very quickly.

5. Rinnai Low NOx Outdoor Heater
This tankless device has a maximum BTU of 180,000 and a maximum energy factor of 0.82. It comes with unique features like leak detection and temperature lock. This could reduce the possibility of long-term water damage to your home.