Ookuramaya Memorial Hospital

Optimization of the thermal system

Ookuramaya Memorial Hospital

They are well known in the local community as a community-based hospital since 1963. In 2010, they joined the Yokohama Medical Group and are actively developing follow-up services for patients through cooperation among hospitals.

Hospital image

Reason for Selection

Understand where heat is going and use it effectively

We used to use NTEC’s competitor steam boilers for hot water supply, heating and cooling, and autoclaves. However, with the introduction of individual air conditioning and the electrification of the autoclaves, steam was used only for hot water supply. NTEC proposed a change to a hot water system that did not use steam, and after considering the possibility of cutting our gas costs by about half, we decided to go with the hot water system. The reduction in fuel costs was not only just as estimated, but it also gave us more space to expand our rehabilitation room, which in turn allowed us to provide more comprehensive rehabilitation services to our patients.

Head of Administration

NTEC’s Proposal

System conversion from
steam to hot water
Zero Steam®

Zero Steam®

Energy and cost savings by converting steam system to hot water system

The conventional steam system was used only for hot water supply, and there was a waste in discarding excess heat from the steam. Therefore, we proposed them a hot water system that directly supplies hot water. The system can save energy and cost without changing the use of the hot water. The EOL-100 is compact, highly efficient, and easy to operate.

Zero Steam®
Zero Steam®
Electric autoclave
Electric autoclave
Before and after of the system


When heat (steam) is used only for hot water supply, it is optimal to convert the steam system to a hot water system. By converting to a hot water system, they have eliminated heat loss due to sensible heat from steam condensate and blowdown and cut their fuel costs nearly in half. They have also eliminated the need for boiler chemicals and Class-1 pressure vessel inspections required with the steam system, which also saves them money.

Gas consumption down by  approx. 50%
Boiler maintenance costs is 0 yen

Related Products


● Specification
Output: 116kW
Efficiency : 90%

Healthcare introductions and case studies


  • Steam Boiler
  • Vacuum Type Water Heater
  • Thermal Oil Boiler

Reliable Service System

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