11 Reviews: Best 40 Gallon Gas Water Heaters (Apr 2024)

Install a point-of-use water heater to increase your hot water supply where you need it most. A mini-tank water heater, the Bosch Tronic 3000T fits beneath kitchen or bathroom sinks. This variant has a 4-gallon tank and is capable of providing hot water to two sinks. The Bosch Tronic 3000T plugs into a regular 120V outlet, just like most point-of-use water heaters. The temperature of your water should be set between 65 and 145 degrees Fahrenheit.

"I am using this as a hot water source in a van camper. This little hot water heater is AWESOME! It is super well insulated, very efficient, compact, silent and robust. Once hot it will maintain the water hot enough for my outdoor shower for 24 hours..."

by Brian S.H.

Starting with this ProLine® water heater, designed to help you save money on your energy costs while still providing hot water for you and your family. Built with eco-friendly non-CFC foam insulation, external heat traps, and a combustion chamber, this product is ideal for maximizing operational cost reductions. Furthermore, with one-hand push-button spark ignition, control is a breeze.

"Bought this 6 weeks ago and it’s been wonderful. An enormous upgrade from the unit we had for several previous years (different brand). Would highly recommend."

by willispat93

The next item on the list is this Noritz water heater, which will provide you with limitless hot water anytime you require it. This tankless water heater features a K-Copper heat exchanger, making it the most robust and efficient in its class. It’s also a tankless water heater, which means it takes up less space.

"relatively easy to install, the unit comes with all the necesities for the exaust, but can be just plugged into the exhaust of the old water heater tank, so no climbing on the roof was needed! Ahhh..."

by tioligirl - take it or leave it

This water heater has a state-of-the-art electronic gas control that allows for more precise temperature control. It also includes an LED control light display, allowing you to easily control this water heater. It is made of 2″ thick, ecologically friendly foam insulation, which helps to decrease heat loss as well as contributes to overall energy efficiency.

Rheem, a well-known company, offers this natural gas tall water heater with a 36,000 BTU/hour environmentally safe low NOx burner that can provide plenty of hot water. This water heater is tough because it has a premium-grade anode rod that protects the tank for a long time. Simply press the button to turn it on, then sit back and enjoy the warm water.

"The water heater was really easy to install and definitely meets our hot water needs!"

by Eddie

Another Rheem product, this time having a glass-lined tank and dual heavy-duty anode rods, making it more durable and resistant to corrosion. Thanks to the electronic gas control valve technology, this heater is designed to give exact temperature control and operational status. It also has a self-cleaning Sta-Kleen® PEX dip tube, which helps to cut down on maintenance.

"Water heater was installed very smoothly and looks like a good product"

by RK

In such a little space, this natural gas water heater is ideal. As you can see, it comes with a suitcase-sized mount that allows it to be neatly placed on the wall, freeing up extra usable space in your home. One of the features that we like about this heater is that the hot water is always ready, thanks to ThermaCirc360 technology, which also provides faster hot water via an extra pump that is offered separately.

"Looks great installed, efficiently works smooth."

by Charles M.

This water heater is sleek, modern, and compact, with a distinct black glassy front panel. Imagine how amazing it will look in your environment. It also has LED touchscreen controls with a digital display and a Fahrenheit display, allowing you to conveniently regulate this water heater. Don’t worry, it’s also built with many safety features including combustion, flame failure, anti-freezing protection, and overheating protection to keep you safe.

"This heater is awesome. The build quality is excellent. The performance is very good also. This will provide plenty of hot water. It is very efficient and sips propane. If you are looking for a propane water heater, this machine is an excellent combination of price, features, quality, and performance."

by Amazon Customer

This Bradford water heater, which comes in a white hue, will not only give hot water for your comfort but also a good look that will complement your environment. For easy control, with smart features like superior Screenlok technology flame arrestor design and resettable thermal switch. It’s also supposed to be a maintenance-free water heater, which is why it’s worth thinking about for its practicality.

"Works great and easy to install. We never run out of hot water now. I would recommend this and give it a five rating."

by Rick Keeling

Whether the vent is installed horizontally or vertically, this water heater is a lifesaver for giving hot water, allowing you to take a hot shower whenever you want. It’s a completely automatic water heater, so all you have to do is switch on the faucet or shower, and hot water will appear in a matter of seconds. The tankless heater will also automatically switch off after the tap is turned off.

"Love my new tankless hot water heater, what a difference it makes. Highly recommended."

by Judy Bradley

Finally, the Sure Comfort is here to ensure that you have real comfort while showering with hot water whenever you need it. This water heater, on the other hand, has a piezo ignition technology that ensures both safety and ease of use. It also includes a maintenance-free combustion air intake system, which eliminates the need to clean and replace filters.

worth the price would purchase again!

by Granny