This old-world style pub in the narrow streets of Haymarket required water source energy recovery units to ventilate the entire building. With tight foot-print constraints and high-efficiency requirements, 50,000 CFM of Innovent E-Series units were installed. This equipment recaptures air, minimizing operating costs by reducing equipment cooling and heating load requirements. It is an efficient solutions for heating and cooling seasons, and will keep the pub comfortable through all its happy hours.