Save up to $150 by shipping to a business with a forklift or loading dock. Contact us for more info.


Eccotemp FVI12 Indoor 4.0 GPM Liquid Propane Tankless Water Heater

The Eccotemp FVI12 Indoor Liquid Propane Tankless Water Heater is one of the most advanced indoor models of the Eccotemp tankless line. Rated at 4.0 GPM with a temperature rise of 38 degrees and 74,500 BTU per hour, the Eccotemp FVI12-LP can meet your hot-water needs! Eccotemp’s advanced 0.7 GPM low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots. Manual temperature controls allow the temperature to be set and regulated at the front control panel, and not your sink or shower.

We recommend the Eccotemp FVI12-LP for smaller single-family homes, apartments, condos, or cabins. Using 1-2 hot water applications simultaneously is a breeze with the Eccotemp FVI12-LP. With our upgraded PCB (Product Control Board) performance and an all-new gas modulating valve, consumers can experience best-in-class temperature performance with a price anyone can afford.

The compact, wall-mounted Eccotemp FVI12-LP has a 110/120-volt UL listed power cord that powers the internal Exhaust Fan, Digital Display and PCB.

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.


  • Rated for 1-2 applications used simultaneously means that taking a shower and running a sink at the same time is effortless. The Eccotemp FVI12 is ideal for hot water heating applications in smaller residential single-family homes, condo, cabin, or apartments
  • Rated at 4.0 GPM at 74,500 BTUs with a temperature rise of 38 degrees, this ultra-efficient tankless water heater is ideal for just about every single-family home
  • Limited Manufacturer Warranty (Heat Exchanger: 5 Years, Parts: 2 Years), live chat, appointments for product support, self-help guides will give you peace of mind that the Eccotemp FVI12 will keep you in hot water for years
  • To ensure the longevity of the Eccotemp FVI12, we recommend cleaning every six months with Eccotemp's patented, one of a kind EZ-FLUSH Descaling Kit to remove all water scale build-up

What's Included:

  • FVi12 Tankless Water Heater
  • 2.5" Wall Thimble
  • 2.5"x18" Termination Pipe
  • 2.5"x90-degree Elbow
  • Gas Appliance Shut Off Valve
  • Mounting Hardware
  • Installation Manual


  • Energy Efficient
  • Easy Install
  • Metal Panel
  • LED Screen
  • Compact Size


  • Rated Flow Rate: 4.0GPM
  • Gas: Liquid Propane
  • Amps: 0.5 Amps
  • Installation: Indoor
  • Color: White
  • Model: FVi12-LP
  • BTU: 2500-74500
  • Power Type: AC
  • Temperature Range: 90°-140°F
  • Water Connection: 1/2" NPT
  • Gas Connection: 1/2" NPT
  • Warranty: 2 Years
  • Weight: 25.6 lbs
  • Product DIms: 25"x14.5x"4"
  • Packaging Dims: 27.75x17.25"x10.75"

To ensure the secure and confirmed delivery of your purchase, Eccotemp requires a signature for all deliveries.

Search our shop