Quality Products - Fast Shipping from Miami, Florida
240V On-Demand Instant Hot Water - Self-Modulating - Whole House and Residential Showers
Endless hot water on demand. 90 percent smaller than traditional tank heaters, the Upromax 13kW delivers instant hot water for showers, sinks, and small whole-house applications, with self-modulating technology that adjusts power use to flow and temperature, lowering your electric bill.
| Power | 13,000 W (13 kW) |
| Voltage | 240 V AC, single phase |
| Amperage | About 54 A (60 A breaker recommended) |
| Wire Gauge Required | 6 AWG copper (consult licensed electrician) |
| Heating System | Instantaneous (Tankless) |
| Modulation | Self-modulating based on flow and temperature |
| Water Connection | 1/2 inch NPT inlet and outlet |
| Display | Digital LED, temperature adjustable |
| Mounting | Indoor wall mount |
| Color | Black |
| Brand | Upromax |
| Condition | Brand New in original packaging |
Tankless flow rate depends on incoming water temperature and how hot you need the output. Estimates for the 13kW unit (assuming 110 F target output):
| Climate / Incoming Water | Temperature Rise | Approx. Flow Rate |
|---|---|---|
| Warm climate (FL, TX, AZ, 75 F inlet) | 35 F rise | About 2.5 GPM (1 shower plus sink) |
| Mild climate (CA, GA, 65 F inlet) | 45 F rise | About 2.0 GPM (1 full shower) |
| Cool climate (50 F inlet) | 60 F rise | About 1.5 GPM (low-flow shower) |
| Cold climate winter (35 F inlet) | 75 F rise | About 1.2 GPM (sink or single low-flow fixture) |
If you need higher flow in cold climates or want to run two showers simultaneously, consider our 18kW model.
|
Great fit for: - 1-2 bathroom homes in warm or mild climates - Apartments, cabins, ADUs, RVs (with 240V) - Replacing point-of-use water heaters - Single-shower households - Sinks, kitchen, laundry use |
Not ideal for: - Cold-climate whole-house heating in winter - Running two showers at the same time - Large family homes (3+ bathrooms) - Homes without 240V or 60A capacity - Outdoor installation (indoor only) |
Wiring, breaker, and water connectors are not included. Please consult a licensed electrician and plumber for installation.
Q: Can I install this myself?
A: We strongly recommend a licensed electrician for the 240V/60A wiring and a plumber for the water connections. Improper installation will void the warranty and may be dangerous.
Q: Will this run two showers at once?
A: In warm climates with low-flow showerheads, possibly. In most cases the 13kW handles one full shower comfortably. For two simultaneous showers, choose the 18kW or larger.
Q: What breaker size do I need?
A: A 60-amp double-pole breaker on a dedicated circuit, with 6 AWG copper wire. Verify with your electrician based on your local code.
Q: Is the unit waterproof for outdoor use?
A: No. This unit is rated for indoor wall mount only. Do not install outdoors or in exposed areas.
Q: How long is the warranty?
A: 1-year limited manufacturer warranty against defects. Contact us through messaging and we will handle replacements promptly.
Q: Where do you ship from?
A: We ship from Miami, Florida via USPS Ground Advantage within 24 business hours of payment.
1-year limited warranty against manufacturing defects. Warranty covers replacement of defective units when installed per the included manual by a qualified professional. Damage from improper installation, voltage surges, or water with sediment or scale is not covered.
Orders are processed and shipped within 1 business day from our Miami, FL warehouse via USPS Ground Advantage. You will receive a tracking number as soon as the label is generated. Most US deliveries arrive within 3-7 business days.
30-day returns accepted. Item must be unused, in original packaging, with all parts and documentation included.
Return shipping is the buyer's responsibility for change-of-mind returns. If the item arrives damaged or not as described, we cover return shipping and provide a full refund.
To start a return, please send us a message with your order number and reason. We will respond within 24 business hours.
Upromax has been an established seller since 2015, with thousands of items sold and high positive feedback. We ship from Miami, Florida and stand behind every product we sell. Questions? Send us a message. We typically respond within a few hours during business days.
Buy with confidence. Fast shipping from Florida and trusted seller since 2015.