Whitepaper ‘keeps TABS’ on building sustainability and overheating issues

A new whitepaper from polymer specialists REHAU is highlighting the importance of sustainable HVAC systems to construction professionals, including ‘thermally activated building structures (TABS)’.

Following CCC warnings that not adapting the built environment to changing climates could pose major risks to occupant health from overheating, the whitepaper looks into TABS technology’s role in resolving this.

A means of space heating and cooling, TABS uses pipework embedded within a building’s concrete structure, running either an elevated chilled water temperature for cooling requirements, or low-temperature hot water for the premises’ heating needs.

“TABS is growing in popularity because they are economical and efficient, yielding up to a 47% reduction in annual energy costs when compared to traditional HVAC systems,” said Franz Huelle, head of technical at REHAU Building Solutions. “This is because whether for heating or cooling requirements, water flows of different temperatures influence the temperature of the building’s concrete structure.

“By opting for such a system, specifiers eliminate the need to regulate temperatures in individual rooms with their own specific load requirements. Instead, the pipework allows the building’s mass and thermal dynamic behaviour to be used to maintain comfortable conditions, almost like a living organism.”

Commonly used for larger buildings, TABS processes activate the large thermal mass of concrete structures, acting as a buffer for varying cooling or heating loads throughout the day.

Franz added: “When it comes to selecting an appropriate HVAC system, everything always comes down to one fundamental question – does this technology offer a compelling business case? As our new whitepaper identifies, given the pressures to deliver buildings that meet future sustainability needs, TABS should definitely be considered under these parameters.

“For example, because these systems can continuously expel heat throughout the day, they are well-placed to tackle the urgent threat of buildings overheating in the warmer months. This is of particular importance as weather patterns become more extreme and high-performance insulation becomes the standard in new-build properties.”