HVAC Energy Recovery

High-Efficiency HVAC Solutions for Commercial Buildings

Smarter Energy Recovery for Sustainable HVAC Systems

Looking to cut HVAC energy costs, enhance energy recovery, reduce carbon emissions, and elminate maintenance headaches? ACT has the solution. Our passive Heat Pipe Heat Exchangers offer a smarter, more efficient alternative to mechanical energy wheels, delivering up to 70% energy savings with a typical payback period of just two years. With no moving parts, our passive heat pipe technology maximizes HVAC energy recovery and efficiency—eliminating the need for motors, belts, and bearings, while reducing maintenance requirements.

Why Traditional Energy Wheels Fall Short

Energy Recovery wheels have inherent limitations that can impact air quality, system design, and maintenance costs:

  • Air Leakage & Cross-Contamination: Imperfect seals allow unintended airflow,. This makes wheels unsuitable for applications requiring zero transfer.
  • Design Limitations: Wheels require side-by-side, equal-sized ducts. This restricts layout flexibility and increasing installation costs.
  • High Maintenance Needs: Motors, belts, and bearings demand frequent upkeep. This leads to higher operational expenses and potential downtime.

But there’s a better way. ACT’s Passive Air-to-Air Heat Pipe Heat Exchangers solve these issues. They eliminate cross-contamination. They offer flexible system design. And they require zero maintenance. The result? Significant cost savings and improved reliability.

HVACE Energy Wheel Comparison thumbnail image
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Choose ACT for HVAC Energy Recovery

  • Reduced Energy Costs: Save up to 70% on HVAC energy consumption
  • Fast Payback: Energy savings payback 2 years
  • Minimal Maintenance: No moving parts significantly reduce maintenance requirements
  • Improved Indoor Air Quality: Eliminates cross-contamination for healthier environments
  • Design Flexibility: Custom engineering allows flexible system integration
  • Increased Reliability: Passive design ensures consistent and dependable performance
  • Reduced Carbon Footprint: Contribute to sustainability goals by lowering energy consumption
  • Flexible Installation Options: Choose what works best for you—ship ACT the AHR, ship to your factory, or opt for on-site installation for seamless integration

Beyond these key benefits, ACT brings extensive expertise across a broad range of HVAC systems, from retrofitting existing setups to new construction and long-distance applications (up to 300′). Our solutions include both passive and pump-assisted HVAC systems, enhanced dehumidification projects, and designs that support LEED and green building certifications. We also provide advanced thermal management for hyperscale and co-located data centers, as well as mobile edge computing.

Read the full case study!

3M Korea partners with ACT to install WAHX systems, projected to save $440,000 for all of 2024

ACT’s Heat Pipe Heat Exchangers: The Solution

We offer two distinct heat pipe heat exchanger designs, each available in a variety of configurations to meet diverse application needs.

AAHX Pump Assisted Split Loop Thermosyphon

Wrap-Around Heat Pipe Exchangers

Dedicated Outdoor Air System

The Wrap-Around (WAHX) system includes a pre-cool and reheat coil connected by heat pipes around an existing air handler’s cooling coil. It enhances dehumidification and reheat efficiency, improving indoor air quality while reducing energy costs. By minimizing the need for gas or resistive heating, it supports precise temperature and humidity control, making it ideal for applications requiring optimal climate management.

WAHX
WAHX Half E-Coated®
WAHX Split Loop Thermosyphon with 100% reheat control

Partner with ACT for Sustainable HVAC Solutions

Whether for new contsruction or retrofits, ACT partners with you from design to manufacturing and installation to deliver a high-performance, energy-savings HVAC system.

Ready to upgrade your HVAC system? Contact us today!

AAHX Pipe to Pipe Connection
Adapt our Air-to-Air Heat Exchangers to your exact needs. Mount them vertically, horizontally, or flat within your AHU or ductwork. Benefit from efficient, flexible designs featuring pipe-to-pipe connections for every row and pipe, customizable coil dimensions, and stackable, controllable configurations.
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AAHX Passive Split Loop Thermosyphon
Get the performance of pumped glycol loops without the pumps. Experience high-performance heat transfer with flexible configuration options for coil separation over 100 feet and adaptation to complex ducting. Reliable and low-maintenance, these systems support large-scale, stackable, and controllable coil designs, plus Summer/Winter energy recovery.



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AAHX Pump-Assisted Split Loop Thermosyphon
Ideal for split airstreams (even without side-by-side ducting), it offers flexible design for large systems, optional temperature control, and potential part-year passive operation. Compact, reliable, and low-maintenance, it ensures efficient, controllable performance year-round.
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WAHX Pipe to Pipe Connection
With a direct connection at every row and pipe, the WAHX Pipe-to-Pipe maximizes dehumidification and minimizes reheat energy costs. This system features pre-cool and re-heat coils connected by heat pipes, offering a highly efficient wrap-around design. The pipe-to-pipe connection (every row, every pipe) ensures optimal heat transfer and allows for any coil dimension and stackable, controllable configurations.
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WAHX Split-Loop Thermosyphon
The WAHX Split-Loop offers flexible configurations for challenging ducting layouts. This system features pre-cool and re-heat coils connected by heat pipes, offering a highly efficient wrap-around design. The two pipes per row configuration allows for any length coil and supports stackable, controllable designs.
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WAHX with Control Valves
Maximize WAHX energy savings with ACT Thermal Control Valves. Operate over a wider temperature range, even at lower entering air temperatures. Controllable heat pipe rows maintain precise discharge temperature for optimal performance.
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HVAC Energy Recovery Resources

Explore our comprehensive collection of resources dedicated to advancing HVAC energy recovery. Here, you’ll find insightful blogs, informative videos, detailed articles, and more—all focused on innovative thermal management solutions for energy-efficient HVAC systems. Whether you’re looking for technical papers, industry trends, or expert insights, our resources are designed to keep you informed and help you optimize indoor air quality, improve dehumidification, and reduce energy costs.

HVAC Learning Center

Discover a wealth of HVAC knowledge, featuring resources like articles, videos, industry news, and training opportunities.

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Video | Engineers with Markers

HVAC Reheat Demonstration Unit

Watch

Blog

Air-to-Air vs Wrap-Around Heat Exchanger: Key Differences for HVAC Systems

Read

Blog

Reach your Carbon Emission Reduction Goals with Energy-Efficient HVAC Solutions

Read

Case Study 

Lehigh University saves $200K+ annually after replacing faulty energy wheels with ACT’s Pump-Assisted Heat Pipe Heat Exchangers.

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Case Study

Learn about the installation of ACT’s pumped Air-to-Air Heat Exchangers in a multi-story building, optimizing HVAC performance and reducing energy consumption.

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Optimize your HVAC system today. Contact us for expert guidance on efficiency, energy recovery, and indoor air quality.
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