Client service and being a trusted advisor is at the heart of the close collaboration with Cobb Marietta Coliseum and Exhibit Hall Authority that Andy Waits, LEED AP BD+C, has cultivated over the last 15 years. We are privileged that Andy is one of the first calls the facility engineer makes when planning an HVAC project.
We brought AHA’s technical, detailed engineering expertise, along with Andy’s familiarity with The Authority to design the replacement of Atlanta’s Cobb Galleria Centre air conditioning systems that affect four major ballrooms, main lobby, and pre-function areas.
For Phase I, we tailored 12 new custom 33,000 CFM 4-pipe single zone VAV air handling units. They have modulating face/bypass dampers, water side economizer, modulating outside air controlled by space CO2 sensor, modulating 100% exhaust fan, pre/re-heat coils, building pressurization sensor and variable speed plenum supply fan (totaling 630 tons installed).
Customized solutions were used during Phase II, with 13 new VTS 4-pipe single zone VAV air handling units with modulating face/bypass dampers, water side economizer, modulating outside air controlled by space CO2 sensor, modulating 100% exhaust fan, pre/re-heat coils, building pressurization sensor and variable speed direct drive supply fan. Phase II is ongoing with 7 units replaced and the last 6 will be installed later this year (totaling 480 tons installed).
Both phases have compressed construction schedules during which AHA, Cobb Galleria, and the construction team precisely coordinate the cranes and helicopters required for the equipment installation and removal.
The Authority is planning a new 375 key hotel and replacing their chiller plant’s two water-cooled chillers (total 1,100 tons) with new variable flow primary chillers, and also plan to replace two atmospheric gas fired boilers (7,000 MBH input) with four (4) high efficiency variable flow condensing boilers.