Gas hot water heaters offer homeowners an effective and popular option for high-efficiency and performance while reducing environmental impact.
In this article, we'll explore the benefits of gas hot water heaters, compare them to electric models, and provide information on top-selling brands, prices, and where to find the best deals. We'll focus on gas water heating in residential homes, covering propane and natural gas-powered storage tank-type or tankless models, as well as tips for installation and maintenance. We'll also include reviews of popular manufacturers and models, troubleshooting common problems, and how to resolve them.
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Selecting the right gas water heater can be a daunting task, with a variety of types, sizes, and features to consider. Whether you're upgrading your current unit or purchasing a new one, it's important to choose a model that fits your household's hot water needs, budget, and energy efficiency goals.
In this section, we'll guide you through the key factors to consider when selecting a gas water heater, including size, efficiency, fuel type, and features, to help you make an informed decision.
When choosing a gas water heater, you'll need to decide between natural gas and propane. The right fuel type for your household depends on availability, cost, and efficiency.
If natural gas is available in your area, it's often the more affordable and efficient choice. It's also a cleaner-burning fuel than coal or heating oil, and produces fewer greenhouse gas emissions. However, if natural gas isn't an option, propane is a good alternative.
Propane is more portable than natural gas, making it a popular choice for rural areas or off-grid homes. It's also more energy-dense, meaning it can produce more heat per unit of fuel compared to natural gas. However, propane is typically more expensive than natural gas and requires a propane storage tank.
When comparing natural gas vs. propane, it is worth mentioning that the Uniform Energy Factor (UEF) is almost the same for most brands of gas heaters, both heating water fast.
Propane gas has twice the energy of natural gas (2,516 BTU vs. 1,030 BTU), but it is more expensive and requires frequent delivery from your propane dealer. As opposed to inconvenient propane delivery, a well-established natural gas network provides a continuous gas supply from your utility company.
Both gas types are eco-friendly and are considered "green fuels," emitting lower levels of "greenhouse" gases. When comparing them side by side, propane gas does not harm the environment, while natural gas does to some extent, so when released into the atmosphere, it contributors to greenhouse gases.
To ensure safety and proper operation, the conversion of gas water heaters from one gas type to another should only be performed by a licensed technician. These devices are properly labeled and come with a conversion kit. According to A.O. Smith, the conversion of a gas water heater from natural gas to LP gas (propane) is not permitted, but is allowed from LP to natural gas.
There are two types of water heaters you can choose from; storage tank-type and tankless, which can be further divided into groups with and without condensing technology.
Tank-type water heaters are designed with water storage tanks that have a capacity ranging from a few gallons to over 100 gallons and are used in residential homes.
Hot water is always readily available with tank-type water heaters. The advantage of tank-type over tankless models is their lower cost and simpler design, making them less prone to failures.
The most advanced models utilize condensing technology, such as this Vertex model from AO Smith.
Tankless water heaters heat water on-demand, as water passes through the heat exchanger. Since there is no storage tank, hot water is always fresh and clean. The main advantages of tankless models over tank-type heaters are their small, compact design, longer lifespan, energy efficiency, and flexible installation options.
If you choose a condensing model, you can enjoy even greater energy savings and environmental benefits. See below for some examples of the best-selling tankless models.
The proper sizing of a water heater is crucial in ensuring sufficient hot water supply for your home, resulting in increased comfort, efficiency, and savings.
Tank-type gas water heaters are typically installed in a designated room on the floor, while tankless options can be mounted almost anywhere due to their small size and flexible venting options, including bathrooms and kitchens, primarily on the wall.
The most popular tank-type models come in 40, 50, and 60-gallon capacities, providing enough hot water for families of four and homes with up to two bathrooms while remaining affordable.
For tankless devices, a flow rate of 8 gallons per minute or more can deliver the same amount of hot water for families of the same size.
According to this article, a decent shower requires approximately 20 gallons of hot water, and 30 gallons are necessary for washing clothes.
For sizing a tankless, you'll need around 2-3 gallons per minute for a shower and 2 gallons per minute for the washing machine.
Over the years, gas water heaters have evolved significantly with the incorporation of advanced features and technologies. These features not only enhance the functionality and efficiency of the units but also improve safety and convenience. From self-cleaning systems to WiFi connectivity, there are numerous advanced features that you can consider when purchasing a gas water heater. In this regard, it's essential to understand the benefits of each feature to make an informed decision that meets your needs and budget.
Other important factors to consider when buying a gas hot water heater are the options for efficient and cost-effective venting.
When the heater runs, it needs fresh air for combustion and ignition, which can come from indoors or the outdoor atmosphere. It's also essential to safely remove flue gases outside using the house chimney or provided vents.
There are several types of venting systems to consider:
If looking to buy the best tank-type gas heater, check out AO Smith GDHE-50-NG Vertex 100 or Polaris water heater, both boasting an ultra-high energy efficiency of 96%. These models also have a high first-hour rate, ensuring fast and reliable hot water delivery.
If looking for the best tankless, consider buying one of the condensing units, such as Takagi, Rinnai, or Noritz. These models are known for their ultra-efficient water heating and ability to deliver hot water on demand and in an endless supply.
Ultimately, the choice between a gas or electric water heater will depend on your household's specific needs, budget, and preferences. By weighing the pros and cons of each type, you can make an informed decision that meets your hot water needs while also being energy-efficient and cost-effective.
In this section, we will compare both types.
Money-saving tip: If gas hot water heaters are expensive to buy, renting one is always an option. Renting a water heater is convenient and gives you peace of mind, so if anything goes wrong with the unit, most parts and services are covered.
If you are considering switching from your existing heating system to a new one that uses natural gas or propane, here are some important things to keep in mind.
A gas tank-type water heater works by heating water in a tank using a gas burner located at the bottom of the tank. When hot water is needed, cold water enters the tank through a dip tube and is heated by the gas burner. The hot water then rises to the top of the tank where it is drawn off through a hot water outlet and used for washing, bathing, or other purposes.
The gas burner is controlled by a thermostat that senses the temperature of the water in the tank and turns the burner on or off as needed to maintain a consistent temperature.
To ensure safe operation, the tank is equipped with several safety features, including a TPR (Temperature and Pressure Relief) valve, which releases pressure if the temperature or pressure inside the tank becomes too high. There is also a thermocouple design to send the signal to the gas valve to open and starting the ignition, and to prevent gas leak if the pilot light goes out.
To vent the products of combustion out of the home, the tank is equipped with a flue tube and draft hood.
Gas water heaters are generally considered safe, but there are potential safety risks that homeowners should be aware of.
Gas leaks can occur if there is a problem with the gas line, gas valve, or gas connection. This can result in a dangerous buildup of gas in the home, which can lead to explosions or fires.
Carbon monoxide poisoning is another potential risk associated with gas-powered appliances that are not properly vented. Carbon monoxide is a colorless and odorless gas, which can accumulate in the home and lead to headaches, nausea, dizziness, and even death.
Fires can also occur if a gas water heater is not properly installed, maintained, or operated. For example, if the flue is blocked or damaged, it can cause the heater to overheat and potentially catch fire.
Overall, gas water heaters can be safe and reliable if they are installed and maintained properly, and if appropriate safety precautions are taken. It's important to work with a licensed professional to ensure that your device is installed correctly, and to have it serviced regularly to prevent potential safety risks.
The lifespan of a gas water heater can vary depending on several factors, such as the type of heater, quality of the unit, frequency of use, and the quality of the water being heated.
In general, tank-type gas water heaters have a lifespan of 10-15 years, while tankless models can last up to 20 years or more.
Regular maintenance can also help extend the lifespan of a gas water heater. Flushing the tank annually to remove sediment buildup, checking and replacing the anode rod as needed, and ensuring proper ventilation and safety features are in place can all contribute to a longer lifespan for the unit.
When purchasing a new unit, it's important to consider the warranty offered by the manufacturer. The warranty can provide some protection against defects and premature failure of the unit.
Most warranties cover the tank and parts for a period of 6 to 12 years, with some tankless models offering longer warranties of up to 15 years.
It's important to read the warranty terms carefully to understand what is covered and for how long.
Gas water heaters can vary in cost depending on the type and features of the unit. The price range for a basic tank-type gas water heater can start at around $500, but more advanced models with features like high energy efficiency and longer warranties can cost upwards of $1,000.
Tankless gas water heaters tend to be more expensive, with prices ranging from $700 to $2,000 or more. It's important to consider both the upfront cost and long-term energy savings when deciding on a gas water heater.
Buying a gas water heater is a decision that should not be made hastily, as it can impact your energy bill and household budget.
While tank-type heaters have been the standard for many years, there are now many options available, including tankless, hybrids, boilers, condensing, and non-condensing models.
It's important to consider factors such as energy efficiency, cost-effectiveness, and safety features when making your decision.
Gas condensing models with an energy factor of at least 0.9 are a great option for those looking to cut energy costs, and natural gas delivery can provide a cost-effective solution for your water heating needs.
By taking the time to carefully consider all the factors, you can choose a gas water heater that fits your needs, saves you money, and ensures safety and peace of mind.