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SX Direct Expansion Cooling Technology

SongXin DX Split System — High-Capacity Direct Expansion Cooling for Modern Commercial Buildings

12–480 kW Cooling Output
Air Volume 2,300–76,000 m³/h
Fast Installation
30% Energy Savings

Ideal for Offices, Restaurants, Hotels, Labs, Industrial Workshops & Large Retail Spaces

Commercial HVAC split system cooling unit
30%
Energy Savings
480 kW
Max Cooling Output
Complete Guide

DX Split System: The Complete Guide to Efficient Business Cooling Solutions

Energy Savings
Up to 30% lower electricity bills
Installation Time
50% faster than traditional systems
Coverage Area
Perfect for 500–50,000 sq ft
Best For
Offices, shops, restaurants, factories
Are you tired of high cooling bills? Moreover, does your current system break down too often? If so, then a DX Split System might be exactly what your business needs. Furthermore, these smart cooling systems can cut your energy costs while keeping everyone comfortable.
Learn

What is a DX Split System?

A DX Split System is like a super-smart air conditioner for businesses. Additionally, it has two main parts that work together perfectly:

Outside Unit
This box sits outside your building. It contains the compressor that does the heavy work.
Inside Unit
This part goes inside your building. It blows cool or warm air where you need it.
Fun Fact: The "DX" stands for "Direct Expansion." This means the system cools air directly without using water pipes like old systems do.

Unlike traditional systems, a DX Split System connects these parts with simple refrigerant pipes. As a result, installation becomes much easier and faster.

Commercial HVAC outdoor compressor unit on building rooftop
HVAC indoor air conditioning unit
Technical Specifications at a Glance
Air Volume
2,300 – 76,000 m³/h
Cooling Capacity
12 kW – 480 kW
Optional Sections
Filtration, Heating, Humidification, Sterilization
Application
Metallurgy, Chemical, Electronics, Hospitals, Hotels, Offices
Advantages

Top 7 Benefits of DX Split Systems for Your Business

Choosing a SongXin DX Split System brings many advantages. Moreover, each benefit can help your business save money and run better.

1
Lower Energy Bills
Save 20–30% on electricity costs each month with high-efficiency compressors and smart energy management.
2
Faster Installation
Get your system running in days, not weeks — minimizing business downtime during setup.
3
Quiet Operation
Workers stay focused without noise distractions thanks to advanced vibration-dampened engineering.
4
Easy Maintenance
Fewer repair calls and lower service costs with modular components designed for quick access.
5
Smart Controls
Control temperature from your phone or computer — schedule, monitor, and adjust remotely.
6
Clean Air
Built-in filters remove dust and allergens, creating a healthier environment for everyone inside.
7
Flexible Design
Works in small offices or large warehouses — scalable configurations for any space requirement.
Specifications

DX Split System — Parameter Range

Complete technical overview of typical operating values across the SongXin DX product line.

HVAC system technical equipment
Parameter Range (Typical Values)
Cooling Capacity (kW)12 – 480
Heating Capacity (kW)13 – 500
Air Flow (m³/h)2,300 – 76,000
Power Input (kW)3.5 – 157
Compressor TypeScroll / Screw (depending on size)
RefrigerantR22 / R407C (others optional)
Indoor Unit Dimensions (mm)720 × 820 × variable → 3320 × 3100
Outdoor Unit Dimensions (mm)750 × 1250 × 750 → 3380 × 2350 × 6000
Piping ConnectionLiquid: 9.52–34.9 mm  |  Gas: 19.05–92 mm
Power Supply380V / 3Ph / 50Hz
Note: Units can be customized according to project requirements (cooling capacity, air flow, functional sections such as filtration, heating, humidification, sterilization, etc.).
Applications

Typical Uses for SongXin DX Split System

Modern open office space with comfortable working environment
30 – 70 kW
Medium Offices, Shops, Banks
Compact installation and quiet indoor operation — perfect for focused work environments and customer-facing spaces.
Modern restaurant interior dining area
50 – 120 kW
Hotels & Restaurants
Reliable comfort cooling with zoning control ensures every guest experiences optimal temperature throughout their stay or meal.
Modern classroom and training center
70 – 150 kW
Schools & Training Centers
Stable performance and easy ducted distribution keep classrooms comfortable for students and staff year-round.
Laboratory with scientific equipment and clean environment
50 – 120 kW
Laboratories & Healthcare
Optional filters and humidifiers ensure clean and controlled air — critical for sensitive research and patient care.
Modern industrial workshop factory interior
100 – 200 kW
Light Industrial Workshops
Handles higher internal loads with flexible ducting for large areas — maintaining worker comfort and product quality.
Indoor Unit Overview

DX Split System — Indoor Unit Functional Sections

7
Functional Modules
100%
Customizable
24h
Quote Turnaround
01
Mixing Section
Section 01

Mixing Section

  • Ensures fresh air and return air are fully mixed and evenly distributed.
  • Proportion of fresh air, return air, and exhaust air can be adjusted as required.
  • Flexible design to achieve optimal ventilation performance.
02
Air Volume Regulation Section
Section 02

Air Volume Regulation Section

  • Controls the ratio of fresh air, return air, and exhaust air via dampers.
  • Streamlined aluminum airfoil blades reduce resistance and noise.
  • Minimizes energy loss while ensuring balanced air distribution.
03
Filtration Section
Section 03

Filtration Section

  • Configured with different grades of filters to ensure air quality:
Primary filters (panel or bag type)
Medium efficiency filters (optional)
High efficiency filters (HEPA, optional)
  • Effectively removes dust, particles, and harmful substances.
04
Electric Heating Section
Section 04

Electric Heating Section

  • Equipped with stainless steel electric heating elements or PTC heaters.
  • Available in multiple connection levels to suit various heating capacities.
  • Provides stable, efficient supplementary heating.
05
Heating Section
Section 05

Heating Section (Optional)

  • Offers various heating solutions:
Electric heating
Hot water coil heating
Steam heating
High-pressure or low-pressure hot water
  • Flexible selection based on climate and project requirements.
06
Fan Section
Section 06

Fan Section

  • Equipped with high-efficiency centrifugal fans.
  • Designed with vibration-damping structure, ensuring smooth, low-noise operation.
  • Available in multiple sizes to handle different airflow rates.
  • Provides stable and adjustable air delivery.
07
Silencer Section
Section 07

Silencer Section

  • Reduces noise at supply and return air outlets.
  • Two types available:
Resistive silencer: Thick sound-absorbing lining, effective for wide frequency noise.
Micro-perforated silencer: Metal material, absorbs specific frequency bands with low airflow resistance.
  • Helps create a quiet and comfortable indoor environment.
Get Started

Ready to Upgrade to a DX Split System?

Don't let an outdated cooling system hurt your business profits. Instead, contact our experts today to learn how a DX Split System can transform your workspace. Additionally, SongXin offers free consultations to help you choose the perfect system for your needs.

Ready to Save Money?
Get your free DX Split System consultation today! Our experts will visit your location and provide a custom quote within 24 hours.
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