Spencer RC RTU Replacement

Iowa DPD is soliciting professional services to replace seven rooftop units at the Spencer Readiness Center, with bids due July 8, 2026 and a mandatory site visit on June 30 at 10:00 a.m. at 11 East 23rd Street, Spencer, Iowa.

The scope requires replacement of seven existing Lennox Rooftop Units with Lennox Enlight RTUs equipped with factory-installed options including a High Performance Economizer with single enthalpy, multi-speed ECM direct drive supply fan, built-in BACnet IP and MS/TP protocols, R-454B refrigerant, barometric relief damper, low NOx system, combination coil/hail guards, hinged access doors, environ evaporator and condenser coil system, and 2-inch MERV8 PLE filter with condensate switch. The scope specifies that RTUs should be equipped without an additional fused disconnect if possible; if necessary, RTUs must be ordered without the non-fused disconnect to accommodate installation requirements. Thermostats must be replaced with Honeywell TH8321WF VisionPRO 8000 Smart Thermostats, with modifications to low and high voltage wiring as needed. The project includes comprehensive gas line work with all materials necessary to connect gas to replacement RTUs, including replacement of existing unions and ball valves. Roofing work encompasses roof curb adapters, high wind hold-down brackets, and sealing or repairs to penetrations resulting from installation, with all materials compatible with DuroLast Inc. roofing systems.

Bids will be submitted as a lump sum total via the IMPACS system, and there will not be a public bid opening. All questions regarding scope must be addressed during the mandatory site visit; an RSVP is required to philip.payton@dpd.iowa.gov and koby.w.higgins.nfg@army.mil. The issuing officer is Philip Payton (515-975-6211, philip.payton@dpd.iowa.gov).