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Ventilation & HVAC Pre-Conditioning using PCM

STORE cool overnight or low peak cool temperatures, and ABSORB high temperatures later when needed.

Active Thermal Energy Storage [A-TES]™

The Phase Change Material [PCM] inside the Templok™ AIR Duct is designed to actively and passively store thermal energy helping reduce energy demand and consumption. It is perfect for climates with cool nights and hot days, such as desert climates, cold climates with milder summers and in MANY applications for interior thermal storage or process heat absorption.


NIGHT – When temperatures are cool, power is cheap and HVAC is at it’s most efficient, The Templok™ PCM freezes at it’s design temperature (eg 25ºC/78ºF). Sometimes this happens naturally with no fans or energy use. The PCM literally just re-freezes and releases heat to atmosphere.

DAY – As temperatures rise throughout the day, the fresh air for your building comes in via the PCM Air Duct. As the daytime temperatures exceed the PCM melt point (eg. 78ºF/25ºF), the PCM begins to melt and absorb heat from the incoming air stream. As the hot afternoon arrives, the PCM draws heat out of the ventilation air naturally, reducing compressor load and consumption.

At NIGHT - Charging

Ambient Air outside overnight drops below PCM freezing temperature (eg. Below 25ºC/78ºF)

Dampers are open on roof, allowing cross flow of cool air to help freeze PCM. Addition of fan helps boost cooling.

For interior recirculation systems – Lower temperatures at off-peak or low sun conditions helps charge/store thermal absorption for later.

During DAY - Discharging

The Templok PCM inside the duct chamber is solidified during the cooler overnight.

As temperatures increase throughout the morning, the incoming air temperature approaches the PCM melt temp. As it achieves the melt temp (eg 25ºC/78ºF), the PCM begins to melt and absorb heat from the incoming air. Thereby reducing incoming air temperature, reducing cooling energy.

The addition of dampers helps bypass/isolate the PCM Air Duct and allow for maximum thermal absorption/demand reductions at peak of day (eg. 2pm).

For interior recirculation systems, the PCM absorbs rising heat from inside the building in the return air system, and helps reduce and regulate return air temps. Ideal for cold storage & warehouse conditioning.

Temperature Rise vs Air Flow Data