Energy conservation is a topic of widespread concern, as it is not only crucial for addressing global energy challenges but also directly impacts everyone's daily expenses. Therefore, today we will explore how much daily electricity can be saved by using heating devices driven by brushless motors compared to those with traditional brushed motors. The reason for focusing on this topic is that we are now in the midst of winter, the peak season for heating device usage.
Well, providing a single percentage of power savings is not rigorous and accurate, as the degree of power reduction is highly depended on the specific application, motor design, and operating mode. However, we can analyze it at several levels and provide typical data ranges. In short, under typical operating conditions for heating equipment (like fan heaters or electric heaters), a system using a BLDC motor can typically achieve a total power consumption reduction of 20% to 35% compared to one using a traditional brushed motor, with some well-optimized systems seeing even greater savings.
Let’s see the reasons below:
1. Core Principles of Efficiency Improvement
Energy losses in traditional brushed motors come primarily from: Brush Friction, Electrical-Contact, Iron & Copper losses, But BLDC motors eliminate the first two major losses and further reduce iron and copper losses through optimized electromagnetic design. Their efficiency is typically 15%-30% higher than that of brushed motors of similar power.
2. Specific Energy Savings in Heating Equipment
For heaters, energy saving is not just about motor efficiency but more importantly, the improvement in "System Energy Efficiency."
Higher Airflow-to-Power Ratio: BLDC motors convert more electrical energy into useful mechanical energy (airflow) instead of waste heat and noise.
Example: To generate the same airflow (e.g., 300 CFM), a quality BLDC motor might consume only 25W, while a brushed motor might need 35W. This directly saves 10W (approx. 28.5%) in drive power.
Intelligent Speed Control Reduces Wasteful Operation: This is often the largest source of energy savings. Heating equipment doesn't need to run at full power constantly. Traditional Brushed Motor Usually has only "High" and "Low" speeds (low speed achieved via inefficient voltage reduction via resistors). When room temperature nears the set point, the fan either runs at full speed (overheating, wasteful) or turns off completely (causing temperature fluctuations). but BLDC Motor enables seamless infinitely variable speed control. It can perfectly synchronize with the thermostat which results to a significant reduces of total energy consumption and heat waste due to the device operates a steady power maintenance most of the time in a medium-to-low power, avoiding frequent "peak power" draws and on/off cycling, contributing more to savings than the motor's base efficiency gain.
Conclusion: heaters utilizing brushless motors are indeed more energy-efficient, environmentally friendly, and provide a more comfortable user experience, all while helping users save on electricity costs.
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Post time: Jan-02-2026