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Inverter Low Nox Eco 20kw Gas Combi Boiler for Home Heating
US$200.00
100 Pieces
Sample price:US$220.00/piece.Request sample

Product profile

Customization

Available

Capacity

8L

Gas Type

Natural Gas

Model NO.

L1PB20-WS/A1

Type

Balanced

Interior Material

Copper

Installation

Indoor Standard Installation

Housing Material

Stainless Steel

Control Mode

PC Edition

Usage

Bathroom, Kitchen

Certification

ISO9001, CCC

Brand

50-100m2

Function

Heating and Domestic Hot Water

Fuel

Natural Gas

Rated Heat Input

20kw

Thermal Efficiency

Over 90 Percent

Heating Temperature

30-80 Degree C

Hot Water Temperature

30-60 Degree C

Power Supply

220V 50Hz

Protection Class

Ipx4

Expansion Tank

6L

Flue Size

60/100mm

Transport Package

Carton Packing

Specification

740x410x305mm

Trademark

DISIDUN

Origin

Shandong, Dezhou, China

HS Code

8403101000

Key features

High Thermal Efficiency: Level 2 energy efficiency with up to 93.4% thermal efficiency, reducing gas consumption.
Dual Working Modes: Supports independent central heating and instant domestic hot water supply simultaneously.
Comprehensive Safety: Built-in anti-freezing, anti-overheating, flameout, overpressure, and flue blockage protection.
Compact Wall-Mounted Design: Space-saving vertical installation suitable for apartments, villas, and various home styles.
Durable Construction: Features a copper heat exchanger and galvanized steel shell for anti-rust and corrosion resistance.
Intelligent Control: Digital display with precise temperature adjustment and automatic mode switching.
Certified Quality: Passed CCC, ISO9001, CE, and RoHS certifications ensuring national industry standards.
Low Noise Operation: Closed chamber combustion and forced exhaust design ensure stable and quiet performance.

Company profile

Dezhou Watson Electric Co., Ltd.
R&D CapabilitiesHigh Repeat Buyers ChoiceManagement CertificationProduct Certification
Business Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableAverage Response Time: ≤1.69h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier for gas and household appliances, with 3D software design, OEM, ODM, and broad customization capabilities. It reports multiple product, quality, environmental, safety, and service certifications, supported by testing and production equipment. Production-related evidence includes an assembly line, automated machinery, and specialized boiler testers, while the stated off-season lead time is within 15 workdays. Quality controls include assurance and raw-material traceability, but several procedures lack documented records. Financial credibility cannot be confirmed because the provided financial figures are zero. Innovation evidence is mixed: the supplier has patents and one R&D engineer but reported no new products in the past year and no available SDK. Customer evidence includes OEM service for well-known brands and an 80%–100% repeat-buyer preference, but no Fortune 500 cooperation.
Supplier typeThe supplier explicitly identifies as a professional technical supplier and operates in gas appliances, household appliances, and related installation, spare-parts, and non-electric appliance businesses. It also provides OEM and ODM services, indicating a manufacturer with technical and production functions.
CertificationsThe supplier reports National Energy Conservation, National Environmental Protection, CCC, five-star product, after-sales service, gas appliance installation and repair, and multiple patent-related credentials. It also lists ISO9001:2015, ISO45001:2018, and ISO14001 management certifications, providing explicit evidence of broad compliance and management-system coverage.
After-Sales capabilityEvidence includes Star-Rated After-Sales Service Certification, gas appliance installation and repair qualification, and the ability to participate in offline exhibitions. However, complaint-handling procedures have no written records, and the service corrective-action mechanism and supplier-service procedures also lack records, limiting evidence of consistently documented execution.
Production capacityThe supplier reports an assembly line, automatic laminating and palletizing machines, laser marking equipment, online and safety testers, and dedicated household and commercial heating hot-water boiler testers. Its stated off-season lead time is within 15 workdays, while its business scope includes production of gas and household appliances, directly supporting manufacturing capability.
Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. Its 3D design service, ODM capability, and OEM service further support the ability to develop or adapt products for customer requirements.
Client casesThe supplier states that it provides OEM services for well-known brands and reports an 80%–100% repeat-buyer preference. It has no reported cooperation with Fortune 500 companies, and the only specifically named external activity is participation in the Uzbekistan Industrial Products Exhibition 2025; therefore, customer references are positive but limited in detail.

Product Q&A

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. For 150m2 or larger units or villas, choose 28KW or above. For homes in the south without insulation or with multiple bathrooms, increase power by 20% to 30%.
Q:Does the online purchase of a wall-mounted boiler include installation services?
A:
Most online shopping models include free basic installation but exclude special fees like high-altitude work and wall drilling. Auxiliary materials such as pipes and filters need to be purchased separately, with total costs usually around 1,000 yuan.
Q:Can a dual-purpose wall-mounted boiler provide both heating and hot water at the same time?
A:
It cannot run at the same time. The hot water function starts first. The machine automatically switches between heating and hot water modes based on faucet usage, suspending heating temporarily when taking a bath.
Q:Is there a big difference between first-class energy efficiency and ordinary wall-mounted boilers?
A:
First-class energy efficiency boilers, often condensing types, have thermal efficiency over 107%, saving 15% to 20% on gas fees compared to ordinary non-condensing boilers. This is cost-effective for long-term use, especially in large houses.
Q:The old house doesn't have pre-installed heating pipes, can I install this wall-mounted boiler?
A:
Yes. For old or renovated houses, you can choose an open-air radiator system that does not damage walls or decoration. After ordering, you can book a master to measure and design the installation plan.

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