Sufficient Heat Exchange Water Heater Waterproof Powerful Digital Gas Water Heater

Sufficient Heat Exchange Powerful Digital Control Forced Exhaust Gas Water Heater

Product Specification

Product Overview

Features:

1. Tankless Water Heater: This natural gas tankless water heater features steady temperature control and multiple safety protections, including a flame failure device, anti-freeze protection, and overheating protection. It operates with just 3.6 PSI of water pressure, delivering up to 4.21 gallons of hot water per minute. With a maximum temperature rise of 65°C(149°F), this unit is designed exclusively for use with Natural Gas(LNG).

2. Efficient & Energy-Saving: With a high-performance output of 81,888 BTU per hour, this 4.21 GPM instant natural gas water heater provides on-demand hot water for 2–3 points of use simultaneously, making it ideal for bathrooms and kitchens. The advanced combustion technology minimizes gas consumption and reduces operational noise for a more efficient and quieter experience.

3. Premium Quality & Durability: Crafted with a stainless steel body for superior temperature and corrosion resistance, this natural gas water heater is built to last. The oxygen-free copper water tank ensures minimal heat loss and an extended service life. The LED smart digital display allows for easy temperature adjustments between 35°C(95°F) and 65°C(149°F), giving you precise control over your hot water needs.

4. Easy Installation & Use: This tankless natural gas water heater is designed for quick and hassle-free setup. It comes equipped with standard 1/2" NPT water fittings,gas pipe, inlet and outlet water pipe, and a 2.5" horizontal vent pipe for easy installation. For safe operation, ensure proper ventilation and install a smoke exhaust pipe as required.

5. Versatile & Space-Saving: This compact tankless water heater saves over 50% of space compared to traditional tank models, making it a perfect choice for homes, small cabins, and remote apartments. It efficiently meets both bathroom and kitchen hot water demands without the need for an expansion tank. Note: In cold weather, drain residual water by opening the pressure relief valve if the unit will not be used for an extended period.

Customizable Services

1. Smart Variable - Speed Draft Fan
The fan is the core power source for exhausting flue gases in forced – draft water heaters. We adopt a DC variable – speed fan with wide – range speed regulation, paired with an intelligent adaptive air – pressure system that monitors external pressure changes in real time and adjusts the fan speed steplessly via smart pressure – compensation technology. The negative – pressure combustion system directs flue gases toward the fan inlet, and the top – suction structure stabilises the gas flow to ensure efficient combustion. It can withstand winds up to Force 10, remains stable even in typhoon conditions, and operates with low noise – giving you a quiet, comfortable bathing experience.

2. Forced Exhaust System
The forced – draft design actively expels combustion exhaust outdoors using a fan, unlike traditional natural – draft methods, completely eliminating the risk of carbon monoxide accumulation indoors. The fully sealed combustion chamber works with the forced – exhaust technology to ensure 100% sealed flue – gas discharge. The system also includes a blocked – flue protection feature – if the exhaust pipe becomes clogged, the gas supply is automatically cut off within 5 seconds, safeguarding your family’s respiratory health from the source.

3. Air Pressure Switch – The Smart Flue‑Safety Sentinel
The air pressure switch is the core safety sensor for forced‑draft systems, continuously monitoring exhaust pressure to ensure smooth flue gas discharge. When the fan operates normally, the negative pressure actuates the switch to open the gas circuit; if the flue becomes blocked or strong winds cause backdraft, the switch instantly cuts off the gas supply – all within milliseconds. Each unit is precisely calibrated to GB 6932 national standards, with activation and shutdown thresholds accurately set to avoid false alarms while ensuring reliable shutoff at 110Pa. Built with high‑quality micro‑switches rated for over 200,000 electrical cycles, it delivers long‑term durability and consistent protection, reducing CO leakage risks to zero throughout the heater‘s lifespan.

4. Overheat Protection Device
When a sudden fault occurs or during prolonged use, if the temperature inside the heat exchanger exceeds 150°C, the overheat protection device automatically shuts off the gas passage, preventing the unit from continuing to heat up and risking vaporisation – induced explosion or damage to the heat exchanger and other core components. This additional “safety net” effectively extends the service life of the unit, giving you peace of mind and long – term reliability.

5. Digital Control Board
The control board is the “smart brain” of the entire water heater. Using a dedicated microcomputer chip with digital control, combined with a bottom – mounted forced – air combustion and exhaust system, it delivers automatic outlet – temperature stabilisation with high precision. The board integrates functions such as water – temperature display, flame – failure safety protection, and fault alarms, monitoring and coordinating all components in real time. It remains stable and reliable even under thousands of start – stop industrial – grade cycles, ensuring every shower is a consistently comfortable, precisely temperature – controlled experience.

6. High-Voltage Pulse Igniter
Our ignition device uses high – voltage pulse ignition technology with stable spark frequency, long spark length, and reliable performance. The total discharge time is typically between 6 – 15 seconds, with ample power. Unlike traditional water – controlled ignition, the pulse igniter starts as soon as the sensor detects water flow; even if ignition fails, the control board automatically closes the gas valve – eliminating any risk of gas leakage. The high – quality igniter has a service life exceeding 10 million cycles – equivalent to decades of normal household use – providing instant, long – lasting ignition.

7. Smart Segmented Burner
The burner is the “power heart” of the water heater. We use a mechanical wide – temperature – band segmented combustion design that supports free switching between high –  and low – fire states to meet seasonal water – temperature demands. Paired with an electronic winter – summer segmented combustion and temperature – control regulation system, it can adjust to different temperature rises for all seasons simply through a micro – electronic switch, saving energy. Complete combustion, high thermal efficiency, and gas savings ensure every cubic metre of gas delivers maximum value. The burner fire rows are made of 430 stainless steel for robust quality and long life.

8. Water Flow Sensor
The water flow sensor is the “first perceiver” of constant – temperature control. Designed with Hall – effect technology, it offers millisecond – level response and can detect water flows as low as 0.5 L/min. As water passes through the rotor assembly, the magnetic rotor rotates and the Hall element outputs corresponding pulse signals to the controller. It features sensitive response, long life, quick action, high safety, and ultra – low activation flow – fundamentally overcoming the high starting – pressure drawback of traditional differential – pressure water – gas linkage valves, ensuring the water heater starts reliably even under low water pressure.

9. Gas Proportional Valve
The proportional valve is the “gold – standard manager” of constant – temperature hot water and the key to eliminating temperature fluctuations. Our precision gas proportional valve automatically and intelligently adjusts gas output based on inlet temperature, flow rate, and other parameters, with a response time reduced to within 0.8 seconds and gas regulation accuracy of up to 128 fine – tuning steps. Excellent flow linearity, high pressure – regulation accuracy, and superior stabilisation performance ensure that even when multiple points are used simultaneously or inlet temperatures fluctuate, the unit maintains precise constant temperature with temperature deviations controlled to within ±1°C.

10. Outlet Water Temperature Sensor
The outlet water temperature sensor monitors the hot – water output temperature in real time and feeds data back to the control board. Together with the inlet temperature sensor, it forms a dual – sensor, dual – regulation system. Through high – speed and accurate calculations by the intelligent CPU, the gas proportional valve and water – regulating valve operate in two – way coordination, achieving electronically precise outlet – temperature control. The sensors are highly responsive and accurate, ensuring constant temperature and constant flow for the most comfortable bathing experience.

11. Water Inlet Control Valve
The water inlet control valve is the “master switch” of the water circuit. It integrates pressure – stabilising and pressure – relief functions – the stabiliser ensures stable inlet water pressure, preventing pressure fluctuations from affecting constant – temperature performance; the relief function automatically opens when internal pressure rises abnormally (e.g., due to vapourisation from excessive heating) to protect the water heater from hydraulic impact. Selected models also include a strainer and magnetic filter to effectively remove impurities from the water, protecting internal core components and extending the unit’s overall service life.

12. Hot Water Outlet
The hot – water outlet is made of high – quality copper for excellent corrosion resistance and long service life. Its precision – engineered internal diameter and smooth flow surface effectively reduce resistance and heat loss during hot – water delivery. Working with the intelligent temperature – control system, it ensures smooth and stable hot – water output, meeting simultaneous demand from multiple points such as kitchens and bathrooms.

13. Cold Water Inlet
The cold – water inlet is also crafted from high – quality copper, offering corrosion resistance and aging resistance. The precision – designed connection ensures a tight, leak – proof seal with the water supply line. Selected models include an inlet water filter to prevent sand, rust, and other debris from entering the water heater, protecting the pump, heat exchanger, and other core components from damage – safeguarding the unit’s healthy operation from the very first drop.

14. Gas Inlet
The gas inlet features high – standard sealing design to ensure zero leakage throughout the gas delivery process. The connection is compatible with multiple gas types, such as natural gas and LPG, and is easy to install with a firm, secure fit. It works in conjunction with a gas – leakage alarm protection device – when a leak occurs in the supply line, the gas sensor detects the concentration and emits an audible/visual alarm while automatically closing the solenoid valve to cut off the gas supply. From the inlet to the burner, every section of the gas path is safe and reliable.

15. Heat Exchanger – The Core of Thermal Conversion
The heat exchanger directly determines the energy efficiency of the unit. We adopt a specially thickened heat exchanger assembly (approximately 0.2 mm thicker than standard models), which not only extends service life but also effectively improves thermal conductivity. The efficient heat‑exchange design reduces surface temperature rise, enhancing user comfort. Made of high‑quality copper, it offers fast heat transfer, excellent corrosion resistance, and higher thermal efficiency. Depending on your specific requirements, we can equip your selected models with heat exchangers made of oxygen-free copper, tin-plated copper, or stainless steel.

Every component engineered for precision. Every unit built for reliability.
From the smart variable – speed fan to the leakage protection plug, we control quality at every step.
Want to know more about our OEM/ODM capabilities and sample policy? Click “Contact Us” or leave your email. Our sales engineer will respond within 2 hours with customized solutions for your market!

Production Process

Welcome you to contact us and customize your own gas water heater. Support OEM / ODM. We support custom mold design and tailor-made production to match your preferred appearance. Before mass production, we will confirm the first sample with you, allowing you to inspect our quality. After signing the contract and finalizing the Proforma Invoice (PI),  begin batch production for you. During the manufacturing process, every gas water heater undergoes strict testing – ensuring that each unit leaving our factory delivers excellent and stable functionality.In addition, we offer ISTA 1A, ISTA 3A, and ISTA 6A international packaging to significantly reduce the risk of product damage during transit.

About us

About Taiming – Innovation Without Borders

Founded in 2017, Zhongshan Taiming Appliance&Technology Co., Ltd. has always placed product innovation and honest operation at the core of its strategy. Starting with kitchen appliances and household gas water heaters, Taiming steadily built a strong reputation as a professional OEM manufacturer.

Global Expansion & New Categories
In 2019, Taiming pioneered a new product line – RV water heaters – in response to growing international demand. This strategic move successfully transformed the company into an export-oriented business. Through cross-border trade partners, Taiming’s RV water heaters are now widely sold in North America and Australia.

A New Chapter – Shuangmei Electric Appliance Co.,Ltd.
To further strengthen our independent overseas operations, Taiming established Shuangmei Electric Appliance Co.,Ltd. in 2025.  Independently manages Taiming’s international business, and responsible for exporting products, serve overseas customers. Ensure faster response, better service, and deeper market penetration.

Market Recognition
Thanks to outstanding product quality and a professional service team, Taiming has received more than 6,000 visits from overseas merchants. Our products are now sold in 120+ countries and regions across five continents, establishing a strong OEM manufacturer image in the global market.

Core Values & Future Vision

Since 2017years,Zhongshan Taiming Appliance / ShuangMei Electric Appliance Co.,Ltd. has been specialized in research and development of home-used water heater appliance, gas stove, boiler for more than 10years,mainly produce gas water heater(indoor,outdoor and camping series and customized items). Our factory covers more than 20,000 square meters and there are more than 100 employees. We provide one-step ODM&OEM for global market. We have depended R&D department,Produce department,EQ and Testing departments. All our products with CSA,CE,EAC,AGA,CCC,Rosh international certifications to meed the whole world customized demands. Because of focusing on the quality,so we can make the guarantee of 2 - 5 years warranty of our products.

We based on a complete quality management system,driven by institutional innovation and management innovation,relies on the Internet as a platform,and provides online and offline service models to provide high-quality products and considerate services. In the future competition,the company will continue to serve customers around the world with excellent quality,reasonable and competitive prices,on time delivery and perfect after-sales service.
Our corporate mission is: To provide first-class services and continuously innovative products,and to spread the concept of energy conservation and environmental protection. Our aim is: First-class response speed,considerate after-sales service,and win-win development. TaiMing Appliance&Technology is grateful to all our customers for their continued companionship. Thank you for your strong support. We will grow with you,create value together,and embrace the future together.

1. Four automated production lines - The production capacity of a single production line can reach up to 10,000 units per month. During the peak season of orders in autumn and winter, the monthly output of gas water heaters can reach as high as 40,000 units. If you plan to make a purchase, we suggest that you contact us as early as possible to avoid the long delivery period during the autumn and winter seasons.

2. Fully Automatic Shrink-Wrap Packaging – Moisture-Proof & Rust-Proof for Worry-Free Ocean Shipping

Before cartoning, every unit is processed through a fully automatic heat-shrink film wrapper. This tight, transparent layer acts as armor, effectively isolating each machine from high-salinity sea fog corrosion, warehouse dust, and minor handling scratches. No matter how long the sea voyage, every unit arrives at your warehouse looking factory-fresh, significantly reducing end-user return and exchange rates.

3. Fully Automatic Strapping – Eliminating “Collapsed Cartons” & Reducing Damage to Near Zero

We employ fully automatic cross/H‑type strapping machines to reinforce every carton with high-tension bundling. The powerful compression integrates each carton securely with the pallet, thoroughly eliminating carton deformation, bursting, and collapsing caused by rough seas and stacking pressure during transit. Our commitment: any shipping damage caused by insufficient packaging is fully covered by us.

4. Experimental And Testing Equipment

① Fan Life Test Bench, Air Pressure Switch Life Test Bench, Gas Proportional Valve Life Test Bench, Display Screen Life Test Bench. 

When customizing samples for customers and producing large quantities of products, we will conduct lifespan tests on the core components of the gas water heaters to ensure the safety and stability of these components. For components such as fans, pressure switches, gas proportion valves, and display screens, we will perform performance and safety tests for each gas water heater for customers according to strict testing standards.

② Gas Water Heater Comprehensive Performance Test Bench

Installed at the end of every production line, this test bench performs 100% full inspection on every single finished unit before shipment. It automatically conducts airtightness testing (ensuring zero gas or water leakage) and verifies all safety protection functions – including dry‑burn prevention, flame‑failure shutdown, and tip‑over protection – to confirm they respond correctly. Any unit failing any criterion is instantly rejected and never reaches the market. This final quality gate guarantees that every water heater you receive is fully functional and defect‑free.

③ Gas Water Heater Comprehensive Performance Sub-Test Bench
After the main test bench completes 100% full inspection, this sub-test bench performs a secondary auxiliary check on production units, focusing specifically on water pressure stability – simulating household water pressure fluctuations to verify consistent temperature performance and component sealing under varying pressures. This " re-verification gate " effectively filters out potential issues caused by sudden pressure changes, ensuring every shipped unit has a stable and reliable water circuit. Double inspection, double peace of mind.

④ Electrical Safety Comprehensive Test Bench

After passing performance and sealing inspections, every water heater must undergo 100% electrical safety testing on this bench. The system automatically checks grounding continuity to ensure a reliable connection between the metal casing and the earth wire, eliminating shock hazards; it also conducts high-voltage dielectric strength testing (hipot test) to verify that insulation between live parts and the casing meets standards. Any failure triggers an immediate alarm and lockout, preventing defective units from leaving the factory. This final “ electrical safety insurance ” gives your end users peace of mind and you total confidence in every shipment.

⑤ Precision Salt Spray Test Chamber
During the new sample development phase, we place complete water heaters into our precision salt spray chamber to simulate extreme marine environments with high salinity, high temperature, and high humidity through continuous atomized spray testing. Every metal component – including the back shell, burner, heat exchanger, and pipe fittings – must withstand over 72 hours of exposure without red rust, corrosion, or coating peeling. This “ accelerated aging test ” guarantees that your custom samples remain corrosion-resistant and perform like new, whether destined for coastal cities or island nations.

⑥ Programmable Temperature & Humidity Test Chamber
During the new sample validation phase, we place complete units into our programmable temperature and humidity chamber to simulate extreme climate combinations – including high‑temperature/high‑humidity, low‑temperature/low‑humidity, and rapid thermal cycling – to comprehensively evaluate ignition stability, combustion efficiency, electrical insulation performance, and sealing material weather resistance. Through multiple programmable temperature‑humidity cycling tests, we ensure that your custom samples maintain stable performance no matter whether destined for tropical rainforests, frigid regions, or desert areas with extreme day‑night temperature swings.
⑦ Finished Gas Water Heater Comprehensive Performance Testing Equipment

During new sample validation and batch random inspection of mass production, we use our finished product comprehensive performance testing equipment to conduct energy efficiency coefficient testing (thermal efficiency, flue gas temperature, etc.) and a full scan of all safety indicators – comparing every parameter against national standards (GB 6932) and destination-specific certification requirements (such as CE, CSA, AGA, etc.). The system automatically determines whether each unit meets every criterion, ensuring your products not only deliver excellent performance but also clear customs smoothly and enter the market in full compliance, eliminating risks of returns or penalties due to non-compliance.

⑧ Gas Water Heater Service Life Test Bench

During new sample validation and batch random inspection of mass production, we place complete units onto our service life test bench to conduct 10,000 complete start-stop durability cycles, strictly in accordance with national standards (GB 6932) – simulating daily user on/off operations to verify performance degradation and reliability of ignition, combustion, heat exchange, flame-failure protection, and all other systems after long-term repeated use. Every new sample unit must pass this test, and mass production batches are regularly spot-tested. 10,000 start-stop cycles equate to over 10 years of normal household usage – proving your products can stand the test of time.

⑨ Gas Dedicated Analyzer
Gas is the " fuel " for water heaters, and composition fluctuations directly affect combustion efficiency and safety. We are equipped with a gas dedicated analyzer to conduct precise composition testing on every incoming gas batch – including calorific value, Wobbe index, combustion potential, methane content, and other critical parameters. This ensures that the test gas used on our production line perfectly matches the gas supply in your target market, preventing issues such as incomplete combustion, yellow flame, and deflagration caused by gas incompatibility. Every test report is fully traceable, providing reliable data support for your product compliance certification.

⑩ Single-Arm Drop Tester

Packaging is the " last armor " before products go global. Our single-arm drop tester simulates accidental drops during handling, loading, and transit by subjecting fully packed water heater cartons to free-fall impact tests. Testing is strictly conducted according to the packaging standards you specify – whether it's Amazon A1~A6 certification standards or international protocols such as ISTA, ASTM, and ISO – all can be precisely accommodated. Every custom packaging solution must pass rigorous drop tests before mass production, ensuring your containers arrive at overseas warehouses with zero damage upon unboxing.

⑪ Simulated Transport Vibration Test Table

Sustained vibration during long-distance transport is the " invisible killer " that can loosen internal components and compromise product integrity. Our simulated transport vibration test table conducts fixed-frequency and sweep-frequency vibration tests on fully packed water heater cartons, replicating 3D vibration environments encountered in trucks, container ships, and aircraft cargo holds. Every custom packaging solution and internal cushioning structure must pass vibration testing before approval, ensuring that after thousands of kilometers of cross-border shipping, every unit arrives at your warehouse with all components firmly secured, electrical connections intact, and performance " as good as new ".