Eccotemp FVI12 Indoor 4.0 GPM Natural Gas Tankless Water Heater

$399.00 $279.00 (You save $120.00)
Installed Together
Recommended Add Ons
Add A Protection Plan

Eccotemp FVI12 Indoor 4.0 GPM Natural Gas Tankless Water Heater

( 1 )

Eccotemp FVI12 Indoor 4.0 GPM Natural Gas Tankless Water Heater

$399.00 $279.00 (You save $120.00)
Installed Together
Recommended Add Ons
Add A Protection Plan

Product Information

The incredibly efficient Eccotemp FVI12-NG Tankless Water Heater uses an intense gas-fired flame to instantly heat water the moment it passes through the heater exchanger. So, as long as you feed water in, hot water will come out! With the included horizontal vent kit, this Eccotemp FVI12-NG Tankless Water Heater is ready to install for indoor use right out of the box. Great for cabins and smaller homes, so you don't bust your budget for a hot shower! The Eccotemp FVI12-NG Tankless Water Heater is a manual water heater. This means that any water temperature adjustments must be made at the face of the unit using the knobs for water flow and gas pressure. Mixing cold water at your output source is not recommended.

  • Whole home indoor, gas-powered tankless water heater, that activates only when in use, making it an energy saver.
  • For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
  • Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
  • Safe electronic ignition system; plugs into standard 120-volt electrical outlet with UL-listed cord.
  • Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.


Product Features:

  • Frustration Free Packaging
  • Digital thermostat and temperature display
  • Manual water-temperature controls
  • Stainless steel horizontal vent kit included
  • Uses gas only when hot water is activated
  • 30-80 psi water pressure
  • 25,000-74,500 BTU
  • For indoor installation with safe, efficient power ventilation
  • Precise temperature and water-flow adjustment
  • It pulls only 2 watts and 1.07 amps during operation
  • 77 Degrees F rise at 2.3 GPM (gallons per minute)
  • 4.0 GPM flow capacity


What's Included:

  • Natural Gas Tankless Water Heater
  • 2 1/2" 90 degree Elbow with Backflow Preventer
  • Wall Thimble
  • 2 1/2" x 20" Termination Pipe
  • 110 volt UL listed power cord
  • Hardware Pack
  • Instruction Manual
  • 2-Year Limited Warranty


FVI12 Product Info and Manual
FVI12 Warranty

The Eccotemp FVI12 has been tested for use at elevations up to 2000 feet. Installation and use of the Eccotemp FVI12 above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp FVI12 above 5000 feet is not recommended.

IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEM, RECIRCULATING, or FLOOR HEATING nor be used with a bilge pump.

Please Note: Failure to clean and descale your water heater quarterly can result in lime and sediment build up within the heater, which can void your warranty! We recommend using our Eccotemp EZ-Flush System Descaler Kit to ensure a clean, energy efficient, long lasting heater! Click here for details.

All Whole Home Water Heater purchases will be shipped with SIGNATURE REQUIRED. If you wish to remove SIGNATURE REQUIRED from your shipment please contact Customer Service immediately to have it removed. Please Note: By opting out of SIGNATURE REQUIRED you release Eccotemp Systems, LLC from all liability of lost or stolen packages. Call 1-866-356-1992 or chat with us here to speak with a customer service agent.

energy-guide-125x90.jpg 

Dimensions 15.25" x 24.75" x 6.00"
GTIN: 00891876002096
SKU: FVI12-NG
5 (1 Review) Write a review
5 Stars
A Super Value and Very Well Made!!!

As a Responsible Master Plumber in the State of Texas, I have installed tank type for years and recently now tank-less. I installed two electric tank-less that I liked and my customers liked. For a small household they were great and one of the customers insisted on electric. 50 amp double pole breaker was required. I purchased some of the Eccotemp LP models and one has gone to Taos, New Mexico to an Earthship project there and I kept one here for emergency hot water. (we had two hurricanes and hot water is a very nice thing to have. cold showers are not fun, but doable) Ok I am rambling. I installed the Eccotemp FVI12-NG tankless on Monday of this week. I was really amazed at the high quality and high workmanship. My customer waited an entire week for me to return from out of town and was extremely pleased when her new unit arrived. It is very nice and worth more money than Eccotemp ask for them. The install took just a little longer but the next will take me less time than a tank type. I am giving her a week to try it but I believe she is very pleased. She gained lots of room in her garage and it works great. I had her test every hot-water outlet in her home and she was getting about 108 to 113. I showed the controls and explained she may need to turn it up some in the winter. Everything was in the kit. (except pressure relief valve)but you must install on exterior wall or corner near exterior to use the stainless steel vent pipe that is included. Make sure the vent pipe slopes down slightly. (the hot gas condenses on it and the liquid is acidic and needs to drain away from the unit. I will buy more and I will install more. I will work on modifying vent system but you must use stainless, no substitutes allowed. Great Job EccoTemp.

Product Information

The incredibly efficient Eccotemp FVI12-NG Tankless Water Heater uses an intense gas-fired flame to instantly heat water the moment it passes through the heater exchanger. So, as long as you feed water in, hot water will come out! With the included horizontal vent kit, this Eccotemp FVI12-NG Tankless Water Heater is ready to install for indoor use right out of the box. Great for cabins and smaller homes, so you don't bust your budget for a hot shower! The Eccotemp FVI12-NG Tankless Water Heater is a manual water heater. This means that any water temperature adjustments must be made at the face of the unit using the knobs for water flow and gas pressure. Mixing cold water at your output source is not recommended.

  • Whole home indoor, gas-powered tankless water heater, that activates only when in use, making it an energy saver.
  • For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
  • Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
  • Safe electronic ignition system; plugs into standard 120-volt electrical outlet with UL-listed cord.
  • Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.


Product Features:

  • Frustration Free Packaging
  • Digital thermostat and temperature display
  • Manual water-temperature controls
  • Stainless steel horizontal vent kit included
  • Uses gas only when hot water is activated
  • 30-80 psi water pressure
  • 25,000-74,500 BTU
  • For indoor installation with safe, efficient power ventilation
  • Precise temperature and water-flow adjustment
  • It pulls only 2 watts and 1.07 amps during operation
  • 77 Degrees F rise at 2.3 GPM (gallons per minute)
  • 4.0 GPM flow capacity


What's Included:

  • Natural Gas Tankless Water Heater
  • 2 1/2" 90 degree Elbow with Backflow Preventer
  • Wall Thimble
  • 2 1/2" x 20" Termination Pipe
  • 110 volt UL listed power cord
  • Hardware Pack
  • Instruction Manual
  • 2-Year Limited Warranty


FVI12 Product Info and Manual
FVI12 Warranty

The Eccotemp FVI12 has been tested for use at elevations up to 2000 feet. Installation and use of the Eccotemp FVI12 above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp FVI12 above 5000 feet is not recommended.

IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEM, RECIRCULATING, or FLOOR HEATING nor be used with a bilge pump.

Please Note: Failure to clean and descale your water heater quarterly can result in lime and sediment build up within the heater, which can void your warranty! We recommend using our Eccotemp EZ-Flush System Descaler Kit to ensure a clean, energy efficient, long lasting heater! Click here for details.

All Whole Home Water Heater purchases will be shipped with SIGNATURE REQUIRED. If you wish to remove SIGNATURE REQUIRED from your shipment please contact Customer Service immediately to have it removed. Please Note: By opting out of SIGNATURE REQUIRED you release Eccotemp Systems, LLC from all liability of lost or stolen packages. Call 1-866-356-1992 or chat with us here to speak with a customer service agent.

energy-guide-125x90.jpg 

Dimensions 15.25" x 24.75" x 6.00"
GTIN: 00891876002096
SKU: FVI12-NG
5 (1 Review) Write a review
5 Stars
A Super Value and Very Well Made!!!

As a Responsible Master Plumber in the State of Texas, I have installed tank type for years and recently now tank-less. I installed two electric tank-less that I liked and my customers liked. For a small household they were great and one of the customers insisted on electric. 50 amp double pole breaker was required. I purchased some of the Eccotemp LP models and one has gone to Taos, New Mexico to an Earthship project there and I kept one here for emergency hot water. (we had two hurricanes and hot water is a very nice thing to have. cold showers are not fun, but doable) Ok I am rambling. I installed the Eccotemp FVI12-NG tankless on Monday of this week. I was really amazed at the high quality and high workmanship. My customer waited an entire week for me to return from out of town and was extremely pleased when her new unit arrived. It is very nice and worth more money than Eccotemp ask for them. The install took just a little longer but the next will take me less time than a tank type. I am giving her a week to try it but I believe she is very pleased. She gained lots of room in her garage and it works great. I had her test every hot-water outlet in her home and she was getting about 108 to 113. I showed the controls and explained she may need to turn it up some in the winter. Everything was in the kit. (except pressure relief valve)but you must install on exterior wall or corner near exterior to use the stainless steel vent pipe that is included. Make sure the vent pipe slopes down slightly. (the hot gas condenses on it and the liquid is acidic and needs to drain away from the unit. I will buy more and I will install more. I will work on modifying vent system but you must use stainless, no substitutes allowed. Great Job EccoTemp.

The incredibly efficient Eccotemp FVI12-NG Tankless Water Heater uses an intense gas-fired flame to instantly heat water the moment it passes through the heater exchanger. So, as long as you feed water in, hot water will come out! With the included horizontal vent kit, this Eccotemp FVI12-NG Tankless Water Heater is ready to install for indoor use right out of the box. Great for cabins and smaller homes, so you don't bust your budget for a hot shower! The Eccotemp FVI12-NG Tankless Water Heater is a manual water heater. This means that any water temperature adjustments must be made at the face of the unit using the knobs for water flow and gas pressure. Mixing cold water at your output source is not recommended.

  • Whole home indoor, gas-powered tankless water heater, that activates only when in use, making it an energy saver.
  • For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
  • Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
  • Safe electronic ignition system; plugs into standard 120-volt electrical outlet with UL-listed cord.
  • Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.


Product Features:

  • Frustration Free Packaging
  • Digital thermostat and temperature display
  • Manual water-temperature controls
  • Stainless steel horizontal vent kit included
  • Uses gas only when hot water is activated
  • 30-80 psi water pressure
  • 25,000-74,500 BTU
  • For indoor installation with safe, efficient power ventilation
  • Precise temperature and water-flow adjustment
  • It pulls only 2 watts and 1.07 amps during operation
  • 77 Degrees F rise at 2.3 GPM (gallons per minute)
  • 4.0 GPM flow capacity


What's Included:

  • Natural Gas Tankless Water Heater
  • 2 1/2" 90 degree Elbow with Backflow Preventer
  • Wall Thimble
  • 2 1/2" x 20" Termination Pipe
  • 110 volt UL listed power cord
  • Hardware Pack
  • Instruction Manual
  • 2-Year Limited Warranty


FVI12 Product Info and Manual
FVI12 Warranty

The Eccotemp FVI12 has been tested for use at elevations up to 2000 feet. Installation and use of the Eccotemp FVI12 above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp FVI12 above 5000 feet is not recommended.

IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEM, RECIRCULATING, or FLOOR HEATING nor be used with a bilge pump.

Please Note: Failure to clean and descale your water heater quarterly can result in lime and sediment build up within the heater, which can void your warranty! We recommend using our Eccotemp EZ-Flush System Descaler Kit to ensure a clean, energy efficient, long lasting heater! Click here for details.

All Whole Home Water Heater purchases will be shipped with SIGNATURE REQUIRED. If you wish to remove SIGNATURE REQUIRED from your shipment please contact Customer Service immediately to have it removed. Please Note: By opting out of SIGNATURE REQUIRED you release Eccotemp Systems, LLC from all liability of lost or stolen packages. Call 1-866-356-1992 or chat with us here to speak with a customer service agent.

energy-guide-125x90.jpg 

Dimensions 15.25" x 24.75" x 6.00"
GTIN: 00891876002096
SKU: FVI12-NG
5 (1 Review) Write a review
5 Stars
A Super Value and Very Well Made!!!

As a Responsible Master Plumber in the State of Texas, I have installed tank type for years and recently now tank-less. I installed two electric tank-less that I liked and my customers liked. For a small household they were great and one of the customers insisted on electric. 50 amp double pole breaker was required. I purchased some of the Eccotemp LP models and one has gone to Taos, New Mexico to an Earthship project there and I kept one here for emergency hot water. (we had two hurricanes and hot water is a very nice thing to have. cold showers are not fun, but doable) Ok I am rambling. I installed the Eccotemp FVI12-NG tankless on Monday of this week. I was really amazed at the high quality and high workmanship. My customer waited an entire week for me to return from out of town and was extremely pleased when her new unit arrived. It is very nice and worth more money than Eccotemp ask for them. The install took just a little longer but the next will take me less time than a tank type. I am giving her a week to try it but I believe she is very pleased. She gained lots of room in her garage and it works great. I had her test every hot-water outlet in her home and she was getting about 108 to 113. I showed the controls and explained she may need to turn it up some in the winter. Everything was in the kit. (except pressure relief valve)but you must install on exterior wall or corner near exterior to use the stainless steel vent pipe that is included. Make sure the vent pipe slopes down slightly. (the hot gas condenses on it and the liquid is acidic and needs to drain away from the unit. I will buy more and I will install more. I will work on modifying vent system but you must use stainless, no substitutes allowed. Great Job EccoTemp.

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