A run-around coil heat recovery system uses two finned coils connected by a closed glycol loop. A pump circulates the fluid between the exhaust coil, where it picks up heat, and the supply coil, where it releases heat into the incoming air. When to Use a Run-around Coil This design is ideal when the supply […]
Heat Recovery in Data Centers: Cooling with Air-to-Air Exchangers
Data centers consume enormous amounts of electricity for cooling. Much of that energy leaves the facility as low-grade waste heat. By using air-to-air heat exchangers, facilities can pre-cool incoming ventilation air with exhaust air, reducing the load on mechanical cooling and improving Power Usage Effectiveness (PUE). Why Data Center Heat Recovery Makes Sense Server racks […]
Heat Recovery for Industrial Drying and Agriculture
Industrial drying accounts for a large share of energy consumption in food processing, wood, textiles, ceramics, and agriculture. Most of that energy leaves the dryer as hot, humid exhaust air. A well-designed heat recovery system can recapture much of that energy and pre-heat the incoming drying air. Why Drying Exhaust Is Ideal for Heat Recovery […]
Plate vs Rotary vs Heat Pipe: How to Choose a Heat Exchanger
Choosing the right air-to-air heat exchanger depends on airflow, temperature, humidity, installation space, and contamination risk. This guide compares the three most common technologies. Quick Comparison Feature Plate Exchanger Rotary Wheel Heat Pipe Efficiency High (70–85 %) High (75–85 %) Moderate (50–70 %) Moving parts None Motor/bearings None Cross-contamination Very low Low with purge Zero […]
Heat Recovery Efficiency Metrics Explained
When comparing heat recovery products, efficiency numbers can be confusing. Manufacturers may quote temperature effectiveness, sensible recovery efficiency, or total energy recovery. Understanding these metrics helps you make fair comparisons and avoid under- or over-sizing equipment. Temperature Effectiveness (Sensible) Sensible effectiveness is the most common metric for air-to-air heat exchangers. It compares the actual temperature […]
Heat Pipe Heat Exchanger: Passive Thermal Transfer
A heat pipe heat exchanger uses sealed tubes filled with a working fluid to move heat from one air stream to another. It has no moving parts, requires no external power, and keeps the two streams physically separated. Working Principle Each heat pipe is a sealed tube with an internal wick structure. At the hot […]
Plate Heat Exchanger: Working Principle, Types and Applications
A plate heat exchanger is one of the most efficient ways to recover thermal energy from exhaust air, process gas, or ventilation streams. It consists of multiple thin metal plates separated by gaskets or formed air gaps, creating alternating channels for the hot and cold streams. Heat moves through the plate material without the two […]
Rotary Heat Recovery Wheel: Sensible and Enthalpy Types
A rotary heat recovery wheel is a rotating honeycomb disc that slowly turns between the supply and exhaust air streams. As it rotates, the wheel absorbs heat from the exhaust air and releases it into the incoming fresh air. In enthalpy wheels, moisture is also transferred, making them ideal for humidity control. How It Works […]
WELL Building Standard Ventilation
The WELL Building Standard v2 (IWBI) is a performance standard for occupant health, and ventilation is one of its strongest levers. Where energy codes set a floor for “acceptable” air, WELL rewards going well beyond it. This article covers the Air Concept features most relevant to recovery and ventilation design. Feature A06 — Enhanced Ventilation […]
RESET Air Standard
RESET Air is the world’s first sensor-based, performance-driven indoor-air-quality certification. Its Commercial Interiors v2.0 standard is about continuous monitoring and transparent reporting, not a one-time design check. This article summarizes the monitored parameters and the targets a space must hold. What Gets Monitored RESET requires continuous monitors covering at least 80% of occupants across all […]