top of page


The SPLIT BUFFER TANK [SBT] and the ZERO - MIXING concept it embraces is an HVAC design and operational approach with a different systemic perspective. Its application looks into the heart of existing HVAC systems and provides technical solutions to an unchecked number of deficiencies which greatly impair thermal operation of heat plants, chiller systems, building hydronic and terminal equipment.

Key technological changes favoring higher HVAC-system efficient operation include:

  • Water Mixing Elimination [impairing system efficient operation] from building heating primary and secondary system loops (or primary-only system), Domestic Hot Water (DHW) or chilled water production.

  • ​​Improved Continuous Boiler Max Output Operation at the highest Steady State Efficiency Test (SSET) conditions, with Entering Water Temperature = 26.7°C/80°F and Leaving Water Temperature = 82°C/180°F, independent of outdoor or domestic hot water imposing conditions.

  • Continuous Boiler Maximum Efficiency Operation independent of weather conditions or any additional system-loads demand. System is designed to consistently provide cold returns so necessary for boiler flue gases CO2 condensation to happened.

  • System Thermal-mass Addition for improved temperature control with more stable boiler runs and longer standby periods, completely eliminating inefficient short-cycling operation [suitable also for primary-only HVAC systems retrofits].

  • Primary and secondary System Loop Seamless Hydraulic Coupling/Decoupling, allowing independent boiler heat-loading from building heat-distribution with no mixing or low/high water adverse loop diversion (also applicable to chilled water production).

  • Reduced Operational Flow Rates [about 50%], allowing downsizing on overall equipment [pumps, VFDs, piping, valves/control-valves  and instrumentation] of new facilities.


bottom of page