Stiebel Eltron 220816 3.0 kW, 120V Mini 3-1 Mini Tankless Electric Water Heater

Product Overview

The Stiebel Eltron MINI3-1, item number 220816, is a compact electric tankless water heater for point-of-use service at a low-flow fixture. It runs on 120 V power and delivers 3.0 kW of on-demand heating without a storage tank. Its small cabinet is designed to mount close to the sink, helping reduce hot-water wait time while saving wall or cabinet space.

Key Features:

• Compact point-of-use design: Installs close to the fixture to save space and help reduce the wait for hot water at a single low-flow sink.
• Tankless electric operation: Heats water on demand, so there is no storage tank to keep hot between uses.
• 120 V dedicated-circuit model: Designed for 120 V, 1-phase power where a properly sized dedicated circuit is available.
• 3.0 kW heating output: Provides localized hot water for small fixtures such as hand-washing sinks when matched to the proper flow rate and inlet water temperature.
• Low activation flow: Activates at 0.40 GPM, making it suitable for controlled low-flow point-of-use applications.
• Small cabinet dimensions: The 6.5 in x 7.5 in x 3.25 in body fits in tight mechanical spaces, cabinets, or near remote sinks.

Technical Specifications:

• Model / SKU: MINI3-1
• Source model reference: Mini 3-1
• Item number: 220816
• Brand: Stiebel Eltron
• Product type: Point-of-use tankless electric water heater
• Voltage: 120 V
• Phase: 1-phase
• Rated power: 3.0 kW
• Rated current: 25 A
• Recommended circuit breaker: 30 A
• Recommended wire size: 10 AWG copper
• Minimum activation flow: 0.40 GPM / 1.5 l/min
• Water connections: 3/8 in O.D.
• Maximum allowable pressure: 150 PSI / 10 bar
• Dimensions: 6.5 in H x 7.5 in W x 3.25 in D

Installation & Versatility:

• Electrical requirements: Install on a dedicated 120 V, 1-phase circuit sized for 25 A operation, with the recommended 30 A breaker and 10 AWG copper wiring.
• Plumbing connections: Connect using the specified 3/8 in O.D. water connections and follow the flow direction and local plumbing code requirements.
• Fixture placement: Mount close to the point of use to reduce distribution distance and support the low-flow fixture application this model is designed for.
• Flow requirement: Ensure the fixture provides at least the listed 0.40 GPM activation flow for the heater to turn on.
• Qualified installation: Use a qualified installer and follow the manufacturer’s installation instructions and all local electrical and plumbing codes.

Common Applications:

• Bathroom hand sinks: Good fit for a single low-flow lavatory or hand-washing sink where hot water is needed at the point of use.
• Remote sinks: Useful for a sink located far from a central water heater, helping reduce piping distance and wait time.
• Office or commercial lavatories: Can serve small low-flow hand-washing fixtures when electrical service and flow conditions match the model specifications.
• Cabinet or tight-space installations: The compact dimensions make it practical for under-sink or nearby wall mounting where space is limited.

Frequently Asked Questions:

Q: What is the item number for this MINI3-1 model?

A: The source document identifies the Mini 3-1 version as item number 220816.

Q: What are the dimensions of the Stiebel Eltron MINI3-1?

A: The listed dimensions are 6.5 in high x 7.5 in wide x 3.25 in deep.

Q: Is the MINI3-1 a plug-in water heater?

A: The source specifications list 120 V, 25 A operation with a recommended 30 A breaker and 10 AWG copper wire. It should be installed on a properly sized dedicated circuit according to the manufacturer’s instructions and local code.

Q: What type of fixtures is this model best for?

A: This model is best suited for a single low-flow point-of-use fixture, such as a bathroom or hand-washing sink.

Q: Does the MINI3-1 provide a fixed outlet temperature?

A: A fixed outlet temperature is not listed in the extracted specifications. Actual outlet temperature depends on incoming water temperature and flow rate.

The Stiebel Eltron MINI3-1 is a compact 120 V point-of-use tankless solution for small sinks and low-flow hot-water needs. Big Frog Supply recommends confirming electrical capacity, fixture flow rate, and code requirements before installation.