Thermal Energy’s proprietary FLU-ACE™ condensing heat recovery system can help hospitals and other facilities recover waste heat from existing energy systems. In one teaching hospital application, a FLU-ACE system was installed on the exhausts from two existing hot water boilers and one CHP system. The recovered heat was used to generate hot water for hydronic heating and domestic hot water, helping the facility make greater use of energy that would otherwise be lost through exhaust.
Based on the site analysis, the FLU-ACE system was projected to deliver approximately $220,000 in annual energy savings while reducing greenhouse gas emissions by an estimated 1,007 tonnes per year.

Hospital Energy Consumption: Why Healthcare Facilities Use So Much Energy
In terms of Btu per square foot, inpatient health care facilities are the second most energy-intensive facility type across the United States, according to the Energy Information Administration.
Just what makes them so energy-intensive? Well for starters, hospitals are open 24 hours a day and are occupied by hundreds or thousands of employees, patients, and visitors. They tend to have sophisticated heating, ventilation, and air conditioning systems to control temperatures and air flow. Moreover, many energy-intensive activities occur in hospitals: laundry, medical and lab equipment use, sterilization, food service, refrigeration, and computer and server use.
Improving Hospital Energy Efficiency with FLU-ACE
About 15% to 20% of the energy used in a boiler plant is lost up the boiler stack. FLU-ACE is a direct contact condensing heat recovery system that recycles the heat normally lost through the boiler flue gas exhaust. It effectively recovers this waste energy and uses it to preheat a heat sink – this could be water for your space heating, domestic hot water, boiler feed water, or outside air heating. By replacing the existing load with our recovered energy, many hospitals have been able to prove savings of 20% on their fuel bills.
Be sure to check out our case studies showing the proven benefits of our energy efficiency solutions for hospitals.
Case studies