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White rectangular wall-mounted unit with glass front panel and digital display

Eccotemp

Eccotemp SH12-A-NG 4.0 GPM Natural Gas Tankless Water Heater

SKU CH-F1Q4-DKQAP MPN SH12-A-NG

Provides 4.0 GPM continuous hot water with 80,000 BTU output and Wi-Fi app control for voice commands and energy monitoring

  • Inlet1/2 in NPT
  • Outlet1/2 in NPT
  • Temperature range95°-140 °F
  • Sold asEach
  • Product typeWater heater
  • Key featuresVoice Commands, Easy Install, SmartHome, Glass Panel, Smart
  • Continuous hot water with 4.0 GPM flow rate
  • Smart app tracks energy use and sets schedules
  • Voice control via Alexa and Google Home
  • Eco mode cuts energy use by up to 25%
  • Compact design fits small homes and condos

Smart Home Tankless Heater

The Eccotemp SH12-A-NG is a natural gas tankless water heater rated at 4.0 GPM and 80,000 BTUs. It delivers continuous hot water for small single-family homes, townhomes, condos, cabins, apartments, or light commercial use. Wi-Fi connectivity enables remote control via a smartphone app and voice commands through Amazon Alexa or Google Home. A glass panel with a smart button provides local on/off, Wi-Fi pairing, and sleep mode.

Ideal for Connected Homes

This unit suits homeowners who want app-based scheduling, energy tracking, and voice control over their hot water supply. Eco Mode can reduce energy use by up to 25% when inlet temperatures are high. Buyers without Wi-Fi or who prefer a basic mechanical thermostat will not use the smart features. Installations requiring a flow rate above 4.0 GPM should consider a higher-capacity model.

4.0 GPM at 35° Rise

The heater provides 4.0 gallons per minute at a 35°F temperature rise, which determines how many fixtures run simultaneously. It operates within a 95°-140°F range and connects via 1/2" NPT inlet and outlet. Verify that your peak demand and groundwater temperature match this output before purchasing.

How it compares

Measured against everything we stock in Water Heater Parts & Add-Ons, at today’s prices. Recalculated every night.

Price $358.99
Pricier than about 90% of the 85 comparable items (median $163.99).

Specifications

Product
Brand nameEccotemp
Model nameSH12-A-NG
Product typeWater heater
Environment & compliance
Temperature range95°-140 °F
More details
Inlet1/2 in NPT
Outlet1/2 in NPT

Questions about this item

What comes in the box with the Eccotemp SH12-A-NG and what must be purchased separately?

The unit includes the tankless water heater with integrated glass panel, smart button, and wireless remote. Gas line, venting, water connections, and the EZ-Flush descaling kit are sold separately.

Which version or capacity of the SH12-A-NG should I choose for my home?

This single model delivers 4.0 GPM at an 80,000 BTU input with a 35° temperature rise, rated for up to 12 applications, making it suitable for small single-family homes, townhomes, condos, cabins, apartments, or light commercial use.

What does the 4.0 GPM rating mean when the heater is installed and running?

At a 35°F temperature rise the heater can supply 4.0 gallons per minute continuously; colder inlet water reduces the flow rate, while warmer inlet water allows higher flow or activates Eco Mode to cut energy use by up to 25%.

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