Mini Tank Water Heaters: Perfect for Kitchens, Garages & RVs
When you need hot water instantly—without waiting or wasting—mini tank water heaters offer a powerful, compact solution. Whether you're outfitting a kitchen sink, a garage workspace, or a mobile home on the open road, ThermoMate’s mini tank electric water heaters deliver dependable hot water exactly where and when you need it.
At ThermoMate, we’ve designed our mini tank models to meet the needs of American homeowners, DIYers, and RV adventurers with options ranging from 1.3 to 8.0 gallons. They're compact, efficient, and easy to install—ideal for spaces where a full-size water heater isn’t practical.
What Is a Mini Tank Water Heater?
A mini tank water heater is a small electric water heater that stores hot water in a compact tank located close to the point of use. Unlike tankless systems that heat water on demand, mini tanks store a small amount of heated water, providing instant access with minimal delay.
ThermoMate’s mini tanks are perfect for under-sink installations, cabinets, garages, or RV compartments, and they connect easily to standard plumbing and power supplies.
Key Benefits of ThermoMate Mini Tank Water Heaters
✅ Instant Hot Water at the Source
Because they're installed near the faucet, there's no need to wait for water to travel from a distant water heater. Perfect for handwashing stations, kitchen prep sinks, or remote locations like garages.
✅ Energy & Water Savings
Reduce standby heat loss and wasted water by heating only what you need, where you need it. ThermoMate mini tanks are insulated and thermostatically controlled for maximum efficiency.
✅ Compact & Versatile
Even our largest 8.0-gallon unit is designed with space-saving convenience in mind. The smallest model (1.3 gal) measures just 11.42" H x 11.42" W x 9.65" D, making it easy to tuck under a sink or inside a cabinet.
✅ Simple Installation
Most models operate on standard 120V outlets and come with all necessary mounting hardware, allowing for a quick DIY or professional install.
Best Use Scenarios
🏡 Kitchens
Eliminate the long wait for hot water with a mini tank heater installed under your kitchen sink—perfect for dishwashing, cooking prep, and more.
🔧 Garages & Utility Sinks
Need warm water in your workshop? A ThermoMate mini tank provides reliable hot water for cleaning up after DIY projects, painting, or repairs.
🚐 RVs & Campers
On-the-go comfort made easy. Our compact models fit into most RV cabinets and deliver steady hot water for handwashing or even quick rinses on the road.
🏠 Tiny Homes & ADUs
Maximize limited space without compromising on comfort. Mini tanks provide hot water access in bathrooms, kitchenettes, and laundry corners in small dwellings.
Why Choose ThermoMate?
ThermoMate mini tank water heaters are built for durability, safety, and performance. All models include:
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Glass-lined inner tanks for long life and corrosion resistance
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Adjustable thermostat (up to 149°F)
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CSA-certified with built-in overheat protection
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Pressure relief valve included
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Wall or floor mounting options
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Comprehensive warranty & free U.S. shipping
We ship directly from our U.S. warehouse, ensuring fast delivery and responsive customer support.
ThermoMate Mini Tank Models Overview
| Model | Capacity | Ideal Use | |
|---|---|---|---|
| ES150 | 1.3 Gal | RVs, small sinks, handwashing | |
| ES250 | 2.5 Gal | Kitchens, garages | |
| ES400 | 4.0 Gal | Bathrooms, laundry sinks | |
| ES700 | 6.5 Gal | Large sinks, light shower use | |
| ES800 | 8.0 Gal | Utility sinks, small tubs, ADUs |
Installation Tips
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Power Supply: Most models run on a 120V outlet; no hardwiring needed.
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Mounting: Wall or floor mounting available—hardware included.
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Plumbing: Standard 1/2" or 3/4" NPT connections make installation easy.
💡 Pro tip: Place the unit as close as possible to the water outlet for best results.
Final Thoughts
If you're looking for a reliable, compact, and energy-efficient hot water solution for your kitchen, garage, RV, or tiny home, a ThermoMate mini tank water heater is the answer.
Designed for American lifestyles and built to last, these small but mighty heaters are changing the way people access hot water—one sink at a time.
👉 Browse our full collection of Mini Tank Water Heaters
Enjoy free U.S. shipping, a Comprehensive warranty, and the support of a U.S.-based team you can trust.
