Eccotemp FVI-12-NG High-Capacity Gas Tankless Water Heater Review

By Robert Flores / May 22, 2020
Eccotemp FVI-12-NG High-Capacity Gas Tankless Water Heater Review

Want to nip the water heater problems in the bud? A wise homeowner needs to probe the super-quality and cost-efficient heaters. From the trenches, a vast pool of customers and industry experts now confirm that standard electric heaters pale in comparison to the latest natural gas-powered units.

The Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater Review uncovers a unique assemblage suitable for multiple small to medium applications.

Natural gas-fired, it will offset your installation costs, function during electricity blackouts, last longer and pose minimal maintenance or replacement demands. Eccotemp FVI-12-NG eats up less energy, has high-level performance, and high-tech features.  

1. Sleek, Space-Saving & Super-Quality Craftsmanship 

The tankless water heater comes with an elegant modern appearance in a compressed shape that snugly fits any space. Weighing merely 33 lbs and measuring 6” x 15.5” x 25”, you only need to carve out a small area to accommodate it. Upper crust craftsmanship and highly developed technology results in a state-of-the-art model.

Premium quality materials used to construct the Eccotemp FVI-12-NG make it sturdy, durable and super-lightweight. It will meet the needs of vacation cabins, RVs, cottages, and smaller homes with space constraints that make it impossible to station a behemoth water heater. Despite its compact appearance, it functions with clockwork accuracy. 

2. Digital Intuitive Controls 

Eccotemp FVI-12-NG comes with a digital temperature display that permits you to adjust settings for precise heat output and water flow rate. It displays the temperature readings of outgoing water. The unit’s digital thermometers adjust easily and give you the ability to manipulate smoothly.

See also  Titan SCR2 N-120 Electric Tankless Water Heater Review

It also possesses self-diagnostic tool that illuminates you on the nuts and bolts of a tankless water heater. The heater also has a water-stress-activated 40 PSI minimum digital ignition. Electronic ignition mechanism ensures that the Eccotemp FVI-12-NG consumes gas only to heat up water. Separate controls allow you to regulate gas pressure and water output temperature differently.    

3. High-Level Performance 

The Eccotemp FVI-12-NG delivers superior performance while gobbling up less energy. It only siphons off roughly 2 watts at rest and 10 watts when running, making it ideal for energy conservation (Energy factor: 79%).

The FVI-12-NG provides a 45 °F surge when running at maximum flow capacity or a 77 °F temperature wave at 2.3 gallons per minute. It’s also equipped with a gas and water control interface with a minimum and maximum gas rate of 25,000 to 74,500 BTUs respectively.

The model boasts power ventilation for improved safety and efficiency. Easily mountable, you can get warm water on demand while it works without a conventional storage tank prone to “standby” energy loss.           

4. Simple Installation 

The system comes with a stainless steel vent kit at-the-ready for set up. The package includes a 110 volt UL listed power cord to connect the internal exhaust fan and digital screen. It works with a standard household 120V electric outlet as part of the listed electrical components.

True 1/2" NPT water fittings allow easy installation and power air flow promotes safety, efficiency, and airing vent options. It offers many conveniences with a compatible and flexible system that you can easily mount to a vertical space and a wall in a safe perimeter in your house. With modicum DIY, you may not require a plumber to set it up.     

5. Endless Hot Water  

Since the Eccotemp FVI-12-NG warms water on-demand, you get an unending supply of hot H2O. With a hot water capability range of 0.93-4.8 GPM, it can feed multiple hot water applications simultaneously. It can provide 4 GPM on a regular basis for an RV, cottages, as well as tiny houses.

See also  Noritz NRC98-DV-NG Direct 9.8GPM Indoor Condensing Vent Review

It supports small-to-medium water supplies where you want more than one hot water application in one fell swoop. The tankless water heater with a maximum temperature increment of 45 °F will hit the highest flow rate.

It provides a continuous stream of hot water around the clock. It packs ultra-powerful elements that pump out more power than systems ensconced in conventional storage tanks.      

Why should you use Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater? 

Compressed, Space-Saving Design 

You can mount the FVI-12-NG virtually anywhere due to its small shape. With traditional methods, you have to give up chunks of space. The sleek modern design does not add an eyesore to your interior décor like super-mammoth hot storage tanks. 

Easy Operation 

The digital temperature display allows you to adjust settings for water and gas rate with a broad range of both. Manual temperature controls add convenience. Exact temperature and water flow tweaking provide a more customized output. You can get a temperature increase and flow rate that meets a variety of residential applications.

High-Tech Components

The Eccotemp FVI-12-NG Tankless Water Heater comes with power ventilation for security, efficiency, and added venting options. It also includes a Tested-Safe electronic ignition system, internal exhaust fan, and digital display.

Reasonable Flow Rate 

The FVI-12-NG renders a flow rate of 0.93 -to- 4.8 GPM with exceptional performance while using minimal energy. The gas-fired water heater can meet hot water requirements for small to medium family-sized applications. You can use hot water on two faucets at the same time.

It makes an ideal picking for cabins, small apartments, cottages, condos and other similar settings.


The gas-powered unit will slash plethora dollars off your annual energy bill. It does not guzzle tons of watts to retain heat in a hot storage reservoir like conventional models. It only warms water on-demand, which means no burden of stick-by energy loss.

Product Benefits

•    Natural gas-fed for minimal carbon emissions

See also  Ariston GL4S Electric Mini-Tank Water Heater Review

•    Precise temperature and water flow rate adjustment

•    Heats water on-demand for energy efficiency (EF 79%)

•    Sleek modern and space-saving design

•    Digital thermometer display and manual water temperature controls for secure operations

•    Power ventilation improves safety, efficiency and venting alternatives

•    Advanced and Tested-Safe Electronic ignition system

•    Supports more than one hot water production applications for small to medium family-sized applications

•    Reduced risk of water leakage and damage as it does not hold a tank that may burst

•    Unlimited hot water supply

the negative things

•    Recommends flushing every three months

•    Lacks scale or leak detectors as well as internal freeze protection

FAQ - Frequently Asked Questions 

1.    What is the size of the gas line inlet?

1/2" NPT water fittings and standard household 120-volt electric outlet

2.    Can it supply water incessantly for one hour in my RV or mobile home?


3.    Can I take a long shower with the Eccotemp FVI-12-NG?

Yes, if you keep the correct flow rate.

4.    Can you vent it vertically through existent venting or you have to do it horizontally?

You can vent vertically, but you’ll need the safe pair of hands from a plumber.

5.    How much does it weigh in comparison to storage tanks?

33 lbs, it’s incredibly lightweight.

Final Verdict

Our Eccotemp FVI-12-NG High Capacity Gas Tankless Water Heater Review propels the unit to the apex of these devices pecking order. It’s a handy unit fashioned for small to medium hot water supply where you need multiple applications simultaneously. It has a compressed, space-saving design, offers energy efficiency with a 79% Energy Factor.

The FVI-12-NG’s easy set-up, digitally-controlled temperature and flow rates, and electronic ignition make its use a piece of cake. You can tweak precise temperatures and water flow rate with no risk of inadvertent adjustments and accidents.

Furthermore, Eccotemp products’ lineup has recently charged ahead of the pack lately due to superior performance and multi-functionalities. 

About the author

Robert Flores