Longwood Central School District

Riello Boiler, Taco Pumps & DHT Semi-Instantaneous DHW Upgrade


For this new construction project the engineers intent was to maximize energy efficiency with improved occupant comfort and control and provide the district with equipment offering redundancy and ease of maintenance.


The original project design scope included two separate Array boilers and a radiant floor heating system throughout the facility, however through the VE process, both the radiant system as well as one of the boilers were omitted. The Riello AR1000’s modular boiler concept still offered the client the redundancy and simplicity of maintenance desired and the use of the DHT SP indirect unit with an A.O. Smith storage tank for domestic hot water functions ensure that the boiler remains in a condensing mode of operation even while in DHW production. A small chemical pot feeder was included for future service and chemical treatment to ensure the system maintains its high level of operation.

Products on the Job

Riello Array AR1000 Boiler
DHT SP Indirect Hot Water Heater
A.O. Smith TJV Domestic Hot Water Storage Tank
Taco FI Base Mounted Pump(s) w/ Taco SmartDrive VFD(s)
Taco 4900 Air-Separator
Taco CA Expansion Tank
Wessels Chemical Pot Fill Unit