Unable to find a low-power under sink water heater that can share a 15-amp circuit with a garbage disposal.

Existing under sink water heaters draw too much power (typically 10+ amps) to safely share a 15-amp circuit with an existing 4.5-amp garbage disposal, and the user is unaware of a low-power model that would work.

Opp. Score

Severity

3Medium

Willingness to Pay

implied

Added

May 19, 2026

App Concept

LowDraw Tankless Mini Heater

A 120V under-sink tankless water heater designed to draw under 8 amps, allowing safe operation on a shared 15A circuit with a garbage disposal. Installs easily under the sink, provides instant hot water at the kitchen tap, and includes a built-in energy-saving mode to limit power usage during disposal operation.

Key Features

Max 7.5 amp draw on 120V circuit
Smart load sharing: pauses heating when disposal runs
Compact under-sink design (fits in standard cabinet)
Digital temperature control (90-120°F)

Target Users: Homeowners with kitchens on 15-amp circuits who want instant hot water without rewiring

Revenue Model: $199 one-time purchase plus $9.99 shipping; optional $49 install kit

Existing Solutions Mentioned

under sink water heaterrecirculation device

Part of App Idea

Unable to find a low-power under sink water heater that can share a 15-amp circuit with a garbage disposal.

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