Energy Saving Tankless Water Heater

SZH's smart toilet control board PCBA is designed for premium electronic bidets, integrating seat heating, energy-saving algorithms, and multi-layer safety protection for enhanced user experience. With over 10 years of expertise, we provide ODM/OEM solutions for global brands, leveraging advanced R&D in precision molds and vertically integrated supply chains for fast delivery and cost efficiency. Annual production capacity exceeds 2 million units, SZH provide flexible customization, empowering clients to lead the smart bathroom market.

  • SZH
  • China
  • Information

1. Product Overview

    This instant water heater is designed for smart toilets, utilizing advanced rapid-heating technology to deliver hot water within 1-3 seconds, eliminating the drawbacks of traditional tank-based heaters, such as long wait times, high energy consumption, and bacterial growth.

1.1 Key Advantages

Instant Heating – No water storage, immediate hot water supply.
Precise Temperature Control – ±0.5°C PID algorithm, adjustable (30°C~45°C).
Energy Efficient – ≥98% thermal efficiency, standby power ≤0.5W (meets China Grade 1 Energy Standard).
Safety Assurance – Water-electricity isolation, with dry-burn, overheat, and leakage protection.

1.2 Applications

  • Residential smart toilets (enhanced comfort and hygiene)

  • Commercial high-end bathrooms (hotels, hospitals, offices)

  • Retrofit for traditional toilets (compatible with low water pressure)


2. Technical Specifications

CategorySpecificationRemarks
Heating TypeTankless (Instant)Ceramic heating tube
Rated VoltageAC 220V±10% / 50HzCustomization
Rated Power1600W / 2000W / 2500W (Optional)Peak 2800W
Temp. Range30°C~45°C (Adjustable)3 presets: Cold/Warm/Hot
Flow Rate2~6L/minPressure: 0.05~0.75MPa
Waterproof RatingIPX4Splash-proof
Thermal Efficiency≥98%GB 21519-2008

3. Product Structure

3.1 Core Components

  • Heating Unit: Nickel-chromium alloy tube with nano-ceramic coating (anti-scaling)

  • Control Module: STM32 MCU + High-precision NTC sensor

  • Waterway System: 316L stainless steel channel + Food-grade silicone seals

  • Housing Material: Flame-retardant PP (UL94 V0)

3.2 Connection Interfaces

  • Water Inlet: G1/2" external thread (standard angle valve compatible)

  • Water Outlet: φ8mm quick-connect fitting

  • Power Input: 3-pin waterproof plug (1.5m cable)



Custom Smart Toilet Mainboard PCBA

Tankless water heater

Modular Function Design

Core Functions (Rapid Integration)

Heating

Cleaning

Control

 Hygiene  

Seat heat

Bidet wash

Power-off flush

Nozzle clean

Dry heat

Feminine wash

Foot-sense flush

Foam shield

Temp adjust

Massage spray

Auto flush  

 

Advanced Customization

- Electronic Extensions:  

  IoT Control: APP/Wireless remote  

  HMI: Smart display + Voice feedback  

  Health: urinalysis (interface reserved)  

- Mechanical Synergy:  

  Auto-lid motor drive optimization  

  Precision foam generator control  

 

End-to-End Development

 Vertical Manufacturing Advantage:  

  Mold R&D: fast structural development (solves deformation/leaks)  

  Electro-mechanical integration: Unified PCBA & heating module design  

  Pilot to mass production: in-house SMT+assembly to ensure fast production


Competitive Benchmarking


Traditional Development Pain Points

Our Solutions

Technical Support

slow development due to excessive feature integration

Modular design + pre-reserved interfaces

patent portfolio

Electro-mechanical design misalignment

Parallel electro-mechanical co-development

In-house mold center + SMT production lines

Lengthy certification cycles

Pre-validated architecture (50% test time reduction)

10-year ODM empirical database 


Transform your smart toilet concept into a market-ready product. Welcome to contact with us today for a personalized proposal with functional prototypes, BOM optimization analysis, and turnkey delivery schedule.


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