High-Efficiency 20kw Wall-Mounted Gas Combi Boiler for Homes

Product Description

Product Introduction

The WSA1-type gas heating hot water stove features an elegant, modern rectangular design with a sleek metallic gold finish, giving it a premium and sophisticated look that elevates residential interior aesthetics. Its wall-mounted structure is compact, making it suitable for small kitchens, utility rooms, or even living spaces without occupying floor space. The front panel displays the brand logo in the upper section, while a sleek, oval-shaped control zone (with a matte silver frame) is positioned below—this zone houses intuitive touch or physical buttons for operation. The smooth, curved edges of the unit add to its refined appearance, balancing functionality with a high-end, decorative appeal that integrates seamlessly with contemporary home decor styles.

Function

As a dual-purpose appliance, the WSA1 gas heating hot water stove is designed to provide both central home heating and on-demand hot water. Powered by gas (natural gas or LPG), it uses efficient combustion to heat water: the heated water is circulated through radiators or underfloor heating systems to warm living spaces, or delivered directly to taps, showers, and household appliances (eliminating the need for a separate hot water storage tank). The integrated control zone allows users to adjust heating temperatures, toggle between heating and hot water modes, set operational schedules, and monitor system status. Built-in safety features (consistent with standard gas appliance regulations) likely include flame failure protection, overheat shut-off, and pressure regulation, ensuring safe and reliable performance in domestic environments.

Advantages

The WSA1 gas heating hot water stove offers several key advantages for homeowners. Its dual-function design combines heating and hot water systems into one compact unit, reducing installation costs and saving valuable floor space—especially beneficial for small homes or apartments. The premium gold finish adds a decorative element, allowing the appliance to blend into (or enhance) interior design rather than appearing as a purely functional fixture. Gas-powered operation is cost-effective, typically more affordable than electric alternatives, and its on-demand hot water delivery minimizes energy waste (unlike storage tanks that continuously reheat water). The intuitive control system ensures easy operation, while built-in safety features provide peace of mind. Overall, this appliance balances style, space efficiency, cost-effectiveness, and functionality, making it a versatile and aesthetically pleasing choice for residential heating and hot water needs.

Product features:	Heating   domestic hot water   zero cold water (optional)
	Wireless indoor thermostats (optional)
	Mobile phone wireless connection (optional)
Product characteristics	Fashionable appearance: LED display, touch buttons, simple and fashionable.
	Safe and stable: carefully designed, reasonable structure, stable, safe and reliable.
	High thermal efficiency: power, wind speed synchronous dynamic adjustment, full combustion, higher efficiency.
	Silent and energy saving: low power consumption of DCverter fan, low noise of sound insulation and heat insulation, low-frequency operation.
	Bathroom performance: high bathroom power regulation ratio, plate heat exchanger segmented combustion quick response, quick constant temperature.
	Adaptive system: automatically adapt to the length of the flue, automatically increase and decrease the speed, automatically replenish the air volume
	Functional advantages: system self-inspection, automatic adaptation, automatic matching, stable performance, safe and reliable
	Quality assurance: accessories are selected from international, domestic first-line, performance, quality assurance.
	3C certification: National mandatory 3C certified products.

Main Product

Company Profile

Dezhou Watson Electric Co., Ltd. is located in the national Tianqu industrial Park ofDezhou City, known as "Jiuda Tianqu, Shenjing Gateway," with convenient transporta.tion and elegant environment. lt is a high-tech joint-stock enterprise integrating R & Dproduction,sales and service of thermal energy equipment.

Since its establishment in 2011, the company has always pursued the development con-cept of technological innovation and perfect quality, providing users with safe, ener-gy-saving and environmentally friendly heating products. Product series: domestic gasheating furnace, commercial gas premixed condensing water heater, Commercial fullpre-mixed steam generator, air source heat pump air heater, air source heat pump airenergy and other high-end products, can provide family and commercial heating, hotwater and heating system solutions, widely used in residential quarters, offce buildings.shopping malls and other places.

The company has a professional scientifc research team, advanced production linesand testing equipment, strong technical strength, complete product models, qualifca-tion certifcate authority, products obtained national quality testing certifcation, Na.tional Energy Conservation Certifcation, National Environmental Protection Certifca.tion, National Compulsory Product 3c Certifcation, Star After-sales Service Certifca.tion, Provincial Quality Inspection Bureau Inspection Certifcation, Gas Burning Appli-ance Installation and Maintenance Qualifcation, National Testing Five-Star ProductCertifcation, Multiple Product Patents and Other Certifcates. The company hasmodern management, practicing lS0001 quality management system, IS045001 occu-pational heath management system, 1S014001environmental management system; Bythe General Administration of Quality Supervision, inspection and Quarantine as thenational hundred best quality and integrity benchmarking enterprise, AAA Quality In-tegrity Demonstration Company, AAA Quality Service Integrity Demonstration Compa.ny, AAA Quality Service Integrity Demonstration Company, AAA Quality Service IntegrityCompany,AAA Credit Rating Certifcate,etc.

Our Factory

Our Certifcate

Exhibition

Packaging & Shipping

FAQ

1. Q: How to choose the power of the wall-mounted boiler to match my home layout?

A: For ordinary residential buildings of 80-150 square meters, choose 24KW, which can meet the heating and hot water needs of one kitchen and two bathrooms; Choose 28KW or above models for 150m2 or larger floor-to-ceiling units or villas; For homes in the south without insulation or those with multiple bathrooms, it is recommended to increase the power by 20% to 30% to avoid insufficient hot water or heating.

2. Q: Does the online purchase of a wall-mounted boiler include installation services? How much is the charge for auxiliary materials?

A: Most online shopping models of brands include free basic installation, but do not include special fees such as high-altitude work and wall drilling. Auxiliary materials such as pipes, corrugated pipes, and filters need to be purchased separately. The total cost of auxiliary materials and special installation fees is usually around 1,000 yuan, and you can consult customer service to confirm the details of the package.

3. Q: Can a dual-purpose wall-mounted boiler provide both heating and hot water at the same time?

A: It can't run at the same time, the hot water function will start first. The machine will automatically switch between heating and hot water mode according to the opening of the hot water faucet, and the heating will be temporarily suspended when taking a bath, and the heating will resume after the hot water is turned off.

4. Q: Is there a big difference between first-class energy efficiency and ordinary wall-mounted boilers? Is it worth spending more money to buy it?

A: The main difference lies in energy efficiency. Most of the first-class energy efficiency is condensing wall-mounted boilers, and the thermal efficiency can reach more than 107%. It can save 15% to 20% of the gas fee compared with ordinary non-condensing boilers. It is very cost-effective to use it for a long time, especially for large houses or families who use hot water for a long time, and the saved gas fee can quickly cover the difference.

5. Q: The old house doesn't have pre-installed heating pipes, can I install this wall-mounted boiler?
A: Sure. For old houses or houses that have already been renovated, you can choose the open-air radiator system, which does not need to damage the walls and decoration during construction, has a short construction period, and has a good appearance after installation. After placing the order, you can book a master to measure and design the installation plan at home.

6. Q: Is there any after-sales guarantee for the product? How long is the warranty period?
A: The product strictly adheres to the national "three guarantees" policy. The main model is guaranteed for 3-5 years, and the core components such as heat exchanger and water pump are guaranteed for 8-10 years. There are official authorized after-sales outlets nationwide, and after reporting a problem, a technician will be arranged to come to the door for inspection. You can contact customer service to inquire about the location of local outlets.
7. Q: Can the wall-mounted boiler still heat normally after the water supply is cut off?
A: It can heat normally. The heating system is a closed water circulation system, which does not need to be filled with water in real time, and water stop does not affect its operation; However, hot water depends on the supply of tap water, and it cannot be used after the water supply is cut off.
8. Q: How to prevent the wall-mounted boiler from freezing when no one is at home for a long time in winter?
A: When you go out for a short time, you can turn on the machine's anti-freezing mode, keep the power and gas on, and the equipment will automatically maintain a low temperature to prevent freezing. If you are away from home for a long time, it is recommended to turn off the water, electricity and gas, drain the water in the machine and pipes, and avoid water freezing and damaging the parts.

9. Q: Does the wall-mounted boiler consume a lot of electricity? Will it consume a lot of electricity during operation?
A: It doesn't consume much power. The main power-consuming components are the fan and the water pump, with a rated power of only 100-200W, and they do not run continuously; they are synchronized with the start-up and shutdown of the heating system, and the monthly power consumption is roughly the same as that of a household refrigerator.
10. Q: Can I return or exchange the product if I find that the model is not suitable after receiving the product?
A: We support a 7-day no-reason return and exchange if the product has not been opened and does not affect resale. If it has been opened or scheduled for installation, it may need to bear the cost of installation and auxiliary material loss if it is not a quality issue, and it is recommended to confirm the compatible model before placing an order.

Model WS/A1		unit	20 kilowatts	24 kilowatts	28 kilowatts
Heating rated heat load		kilowatt	20.0	24.0	28.0
Minimum heating load		kilowatt	7	8.4	9.8
Rated heat output for heating		kilowatt	17.8	21.4	25
Minimize heat output for heating		kilowatt	6	7.1	8.3
Rated heat load of domestic hot water		kilowatt	20.0	24.0	28.0
Thermal efficiency		%	>90
Rated gas consumption (natural gas)		cubic meters per hour	2.22	2.64	3.08
Effective heating area		rice	<100	<150	<200
Antifreeze system start-up temperature		℃	<8	<8	<8
Minimum starting flow rate for domestic hot water		liters per minute	2.7	2.7	2.7
Maximum pressure of domestic hot water system		Megapascal	0.7	0.7	0.7
Minimum pressure of domestic hot water system		Megapascal	0.03	0.03	0.03
Expansion tank capacity		L	6	6	6
Expansion tank pressure		Megapascal	0.1	0.1	0.1
Maximum operating pressure of the heating system		Megapascal	0.3	0.3	0.3
Rated gas pressure (natural gas)		kPa	2.0
Gas pressure range (natural gas)		kPa	1.5-3.0
Maximum set temperature for hot water		°℃	80	80	80
The lowest set temperature of the hot water heater is		Celsius	30	30	30
Maximum set temperature for domestic hot water		℃	60	60	60
Minimum set temperature for domestic hot water		ohC	30	30	30
Hot water production rate (Δt=25K)		kg/min	10.0	12.0	14.0
Hot water production rate (Δt=30K)		kg/min	8.5	10.2	11.8
Rated power		W	120	120	120
Minimum power -		W	100	100	100
Power supply completed		W	2	2	2
Rated voltage/frequency J		one	220V~/50Hz	220V~/50Hz	220V~/50Hz
Types of electric shock protection##		one	My class
Enclosure protection rating		one	IPX4