HVAC solutions save 15-30% energy for modern buildings

NGÀY ĐĂNG 10/04/2026

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Are you facing these problems?

Your HVAC system is still running, but you’re not sure if energy is being wasted?
No data available to evaluate operational efficiency?
Want to upgrade to a smart system but don’t know where to start?

If you are looking for:

HVAC energy-saving solutions
Ways to reduce central air conditioning electricity costs
BMS deployment for buildings / factories

Then this article will guide you from understanding → choosing → implementing the right solution.

How much energy does HVAC consume?

In modern facilities in Vietnam such as office buildings, shopping malls, hospitals, or 24/7 manufacturing plants, HVAC systems account for 40-60% of total energy consumption.

The core issue is not the equipment - but how it is operated:

Air conditioning runs on fixed schedules, not based on real demand
Lack of centralized monitoring and control systems
No data for operational optimization
Equipment operates under overload or overcapacity

As a result:

Energy costs increase year by year
Low operational efficiency
Equipment degrades faster
Difficult to meet green building standards (LEED, LOTUS)

Learn more about how buildings waste energy and comprehensive optimization solutions in the article: Energy-saving solutions to reduce building operating costs.

HVAC Trends 2026: From manual operation to “smart optimization”

Modern HVAC no longer operates independently, but becomes part of the Smart Building ecosystem.

BMS - The central control system for HVAC in modern buildings

In the context of HVAC energy optimization, instead of operating separately, BMS (Building Management System) helps businesses connect - monitor - optimize the entire HVAC system on a single platform.

BMS collects data from HVAC equipment (Chiller, AHU, FCU, VRV/VRF...), analyzes real-time operating status, and automatically controls the system based on programmed scenarios.

Modern platforms from Legrand, ABB also allow:

Remote control via web or mobile interface
Multi-system integration: electrical, lighting, security
Advanced energy data analytics

Simply put, BMS transforms HVAC from “schedule-based operation” → “demand-based operation.”

How does BMS help save HVAC energy?

Load-based control: Reduce capacity at low load and increase when demand rises, avoiding continuous 100% operation
Smart Scheduling: HVAC operates only during usage hours and automatically turns on/off based on schedules
Zoning control: Each area has independent cooling levels, avoiding unnecessary full-building cooling
Data-driven optimization: Analyze historical energy data to detect anomalies and suggest improvements
Alerts & predictive maintenance: Early fault detection reduces downtime and energy waste

HVAC integrated with AI & IoT

In modern buildings, HVAC systems no longer just “react” to settings, but can learn - adapt - predict.

How do AI & IoT help save energy?

Adjust based on user behavior: Learn usage patterns and optimize peak/off-peak hours
Occupancy-based control: Adjust capacity based on the number of people in each space
Optimize based on environmental conditions: Adjust according to outdoor temperature and utilize natural ventilation
Predictive maintenance: Detect anomalies early to avoid inefficiencies and costly repairs
Continuous optimization: AI continuously optimizes based on new data

Demand-based HVAC

Demand-based HVAC means system capacity is adjusted based on real-time demand in each area.

How does it save energy?

Reduce load in low-occupancy areas and shut down when not in use
Optimize ventilation based on CO₂ levels (ensure IAQ while saving energy)
Zoning control to avoid uniform cooling across the entire building
With AI integration, demand can be predicted in advance

Variable Speed Drive (VSD) & Load Optimization

Among HVAC energy-saving solutions, if you need one that is easy to implement - cost-effective - delivers immediate results, it is:

Variable Speed Drive (VSD/Inverter) combined with load optimization

VSD adjusts motor speed based on actual demand.

Without VSD, traditional systems operate as: ON = 100% capacity / OFF = 0%

This leads to energy waste, equipment wear, and unstable temperature control.

How does VSD save energy?

In reality, VSD is just a “tool” - load optimization is the “strategy.”

Load optimization means:

Proper capacity allocation among equipment
Adjusting operation based on actual demand
Avoiding overloading or underloading

Common optimization strategies:

Chiller optimization: Operate multiple chillers at optimal load
Chilled water pump optimization: Adjust flow and reduce speed during low load
Fan optimization: Adjust speed based on temperature/CO₂
BMS integration: Coordinate all equipment and optimize performance in real time

Where should businesses start? (Practical approach)

A common question: Do we need to replace the entire HVAC system?

The answer: No.

Effective implementation roadmap:

Phase 1 - Measurement: Install sensors and collect data
Phase 2 - Control: Deploy BMS for centralized control
Phase 3 - Optimization: Apply AI and automation

This approach ensures cost efficiency and measurable results at each stage.

KPS - Integrated HVAC solution provider

In today’s context of increasing operational cost pressure and sustainability standards, choosing an HVAC provider is not just about equipment, but about a partner who can:

Understand the system - Optimize holistically - Support long-term

KPS approaches HVAC through Integrated Solutions.

KPS HVAC Solution: From standalone systems → Integrated ecosystem

Electrical & Smart Building systems

Solutions from Legrand, ABB form the backbone: