R32 EVI DC Inverter
Air to Water Heat Pump

High-efficiency, eco-friendly heating & cooling solutions from General Energy Co., Ltd. — trusted by professionals across 29 countries.

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A+++ Certified

Energy efficiency that meets European standards

29 Countries

Exported to Asia, Europe, South America, Africa

15,000 Units/Year

Annual production capacity for heat pumps

About General Energy Co., Ltd.

Manufacturer of Heat Pumps & Water Tanks since 2017

Founded in 2017 in Foshan City, Guangdong Province, China, General Energy Co., Ltd. has grown steadily in both domestic and international markets. Our co-founders have been active in the heat pump industry since 2007, bringing over 15 years of experience.

We specialize in R&D, manufacturing, and after-sales services for a wide range of heat pump systems, including air source, air to water, ground source, and swimming pool heat pumps, along with hot water storage tanks and maintenance accessories.

Located in Southern China’s heat pump manufacturing hub, we partner with key domestic and international suppliers to ensure component quality and fast delivery. Our annual production capacity reaches 15,000 heat pump units and 10,000 water tanks.

OEM & ODM Services

Custom branding and design for global partners

ZYUN NANG Brand

Trusted trademark for overseas markets

Global Reach

Products exported to 29 countries

Our Product Range

High-performance heat pumps and accessories built for reliability and efficiency

SDBW-45

EVI DC Inverter Air to Water Heat Pump

• R32 Refrigerant
• A+++ Efficiency
• For heating & cooling

SDBW-60

High-Capacity Air to Water System

• EVI Technology
• DC Inverter Compressor
• Cold Climate Ready

SDBW-90

Commercial-Grade Heat Pump

• Large Output Capacity
• Smart Controller
• OEM Available

SDAW-EVI

Advanced Control System

• Parameter Settings Support
• Troubleshooting Guide
• R32 Compatible

Hot Water Tank

Water Storage Tank

Stainless Steel | 10000 Units/Year

• 100L to 1000L Options
• Insulated Design
• OEM/ODM Support

Ground Source Heat Pump

Ground Source HP

For House Heating & Cooling

• High COP Efficiency
• Stable Year-Round
• Low Noise Operation

Swimming Pool Heat Pump

Pool Heat Pump

Efficient Pool Water Heating

• Corrosion Resistant
• All-Weather Performance
• Energy Saving

Sanitary Hot Water HP

Air Source HP

For Domestic Hot Water

• Compact Design
• Fast Heating
• Smart Control

Controller System

Replacement Controller

For SDDC & SDBW Models

• Full System Support
• Firmware Updates
• Troubleshooting Help

Compressor Unit

DC Inverter Compressor

Core Component for Heat Pumps

• High Reliability
• Low Energy Consumption
• Long Lifespan

Heat Exchanger

Efficient Thermal Transfer

• Corrosion Resistant
• Optimized Flow Design
• OEM Replacement

Expansion Valve

Thermal Expansion Valve

Precision Refrigerant Control

• Accurate Regulation
• Stable Operation
• Compatible with R32

Why Choose Sundez?

High Efficiency

A+++ rated systems with EVI and DC inverter technology

Reliable Quality

Built with premium components from trusted suppliers

Global Support

Serving customers in 29 countries with technical help

OEM/ODM Services

Custom solutions for professional clients worldwide

Support & Technical Resources

Helping customers keep their systems running smoothly

SDBW Heat Pump Support

We still produce SDBW-45, SDBW-60, and SDBW-90 models. Contact us for parts or replacements.

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Available Replacement Parts

• Compressor Units
• Controller Systems
• Heat Exchangers
• Thermal Expansion Valves
• Temperature Sensors
• Circuit Boards

Recent Technical Updates

Parameter Settings of SDAW-EVI Heat Pump

2024/12/10 – Missing codes now available for user manuals.

Temperature Sensor Specs (SDDC)

2024/6/4 – Sensor failure often causes defrost issues.

SDDC Defrost Troubleshooting

2023/3/15 – Guide for resolving defrost failures.

EVI Controller System

2022/12/04 – Replacement options for maintenance.

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R32 EVI DC Inverter Air to Water Heat Pump