Homeowner needs an under-sink tankless water heater that works on standard 120V to get hot water to a distant kitchen sink without expensive electrical work.

No 120V under-sink tankless water heater exists on the market; all require 240V or dedicated circuits, forcing homeowners to wait several minutes for hot water or undertake costly electrical upgrades.

Severity

3Medium

Willingness to Pay

implied

Added

May 13, 2026

Workarounds Described

waits 4 minutes for hot water to reach kitchen sink
considers tankless but can't due to 120V limitation

App Concept

WarmFlow 120

WarmFlow 120 is the first under-sink tankless water heater designed to operate on standard 120V household outlets, providing on-demand hot water without electrical upgrades. It uses advanced heating technology to deliver a sufficient flow rate for a kitchen sink, cutting wait time from minutes to seconds. No plumber or electrician needed for installation.

Key Features

Plugs into standard 120V outlet
Compact under-sink design
Delivers hot water within seconds
Easy DIY installation with quick-connect fittings
Adjustable temperature settings up to 120°F

Target Users: Homeowners with distant sinks (e.g., kitchens, bathrooms) in existing homes where running new 240V wiring is difficult or expensive

Revenue Model: $199 one-time purchase plus optional $29/year extended warranty

Want to go deeper?

Sign up to save ideas, run AI analysis, and track opportunities in your personal workspace. Founding members get full access.

Join Beta

Solutions (0)

Discussion (0)

No comments yet