Consider factors outlined in this section to design with Templok® ceilings in IESVE. Climate-specific operating guidance is detailed in Section 3. New output variables available in VistaPro to interrogate the behaviour of the PCM are introduced in Section 4, and guidance on Parametric simulation of Templok is provided in Section 5.

 

Templok performs best in dry, cooling-dominant climates characterized by large 15–25°F diurnal swings and dry conditions suitable for night ventilation. Templok can also be effective in climates with mild heating seasons that tend to demand space cooling later in the day after the morning warmup sequence.

 

Within buildings, Templok is particularly effective in zones experiencing high internal or solar heat gains during the day, causing the PCM to melt. Typical applications include perimeter zones that naturally become warm during peak hours, or interior zones with substantial occupant or equipment heat loads that diminish overnight, enabling the PCM to recharge.

 

Templok tiles are installed in full grid openings, typically covering 50–70% of the ceiling area, with matching standard tiles used where cuts are necessary. The performance benefits of Templok tend to scale proportionately with its area coverage, so aim to maximize Templok coverage in zones experiencing high internal heat gains and pronounced natural temperature swings.

 

Consider the interaction between Templok tiles and the void or plenum space above. Zones with return-air plenums provide enhanced control over PCM charging and discharging by enabling HVAC management of air temperatures surrounding the ceiling. Templok can also be effective beneath unconditioned void spaces that experience natural temperature fluctuations, such as ceilings located below roof decks.

 

Templok works best with wide heating and cooling setpoints that allow temperature variation and cycling of the PCM. In cooling season, night purge controls to cool the plenum and refreeze the PCM overnight in climates with sufficient outdoor temperature drop and low humidity. During heating season, elevated cooling setpoints allow the PCM to recover more heat from the warmest hours of the day to save heating energy overnight.

 

In humid climates or in buildings without sufficient passive cooling opportunity at night, supplemental mechanical cooling may be needed to facilitate PCM discharge. In these applications, Templok can effectively shift thermal loads away from peak demand periods, though achieving net energy savings requires careful HVAC control to freeze the PCM efficiently. See Table 1 in the Section 3 for further details.