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Armstrong blends revolutionary digital water temperature control technology with instantaneous heat exchanger design to deliver Digital-Flo®, an industry changing series Plate & Frame Steam/Water Heaters.  
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Flo-Rite-Temp Model FRT535P Instantaneous Steam/Water Heater pre-piped parallel/redundant single temperature packaged assembly designed for a Non-Recirculating Hot Water System.
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Flo-Rite-Temp Model FRT665P Instantaneous Steam/Water Heater pre-piped parallel/redundant single temperature packaged assembly designed for a Non-Recirculating Hot Water System. Flo-Rite-Temp FRT665 Pre-Piped Parallel (P) Single Temperature Systems are fully assembled and include the following installation components:
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Flo-Rite-Temp Model FRT8120P Instantaneous Steam/Water Heater pre-piped parallel/redundant single temperature packaged assembly designed for a Non-Recirculating Hot Water System.
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Flo-Rite-Temp Model FRT535DWP Instantaneous Steam/Water Heater pre-piped parallel/redundant single temperature packaged assembly designed for a Non-Recirculating Hot Water System.
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Flo-Rite-Temp Model FRT665DWP Instantaneous Steam/Water Heater pre-piped parallel/redundant single temperature packaged assembly designed for a Non-Recirculating Hot Water System.
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Flo-Rite-Temp Model FRT8120DWP Instantaneous Steam/Water Heater pre-piped parallel/redundant single temperature packaged assembly designed for a Non-Recirculating Hot Water System.
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FRT53540 is a complete pre-piped single wall instantaneous steam/water shell and tube heater. The assembly includes a 535 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV40).
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FRT66550 is a complete pre-piped single wall instantaneous steam/water shell and tube heater. The assembly includes a 665 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV50).
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FRT812080 is a complete pre-piped single wall instantaneous steam/water shell and tube heater. The assembly includes a 8120 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV80).
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FRT535DW40 is a complete pre-piped double wall instantaneous steam/water shell and tube heater. The assembly includes a 535 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV40).
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FRT665DW50 is a complete pre-piped double wall instantaneous steam/water shell and tube heater. The assembly includes a 665 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV50).
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FRT8120DW80 is a complete pre-piped double wall instantaneous steam/water shell and tube heater. The assembly includes a 8120 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV80).
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FRT535P50 is a complete pre-piped parallel (redundant) single wall instantaneous steam/water shell and tube heater. The assembly includes two 535 instantaneous Flo-Rite-Temp water heaters with a Digital Recirculating Valve (DRV50).
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FRT665P80 is a complete pre-piped parallel (redundant) single wall instantaneous steam/water shell and tube heater. The assembly includes two 665 instantaneous Flo-Rite-Temp water heaters with a Digital Recirculating Valve (DRV80).
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FRT8120P80 is a complete pre-piped parallel (redundant) single wall instantaneous steam/water shell and tube heater. The assembly includes two 8120 instantaneous Flo-Rite-Temp water heaters with a Digital Recirculating Valve (DRV80).
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FRT535DWP50 is a complete pre-piped parallel (redundant) double wall instantaneous steam/water shell and tube heater. The assembly includes two 535 instantaneous Flo-Rite-Temp water heaters with a Digital Recirculating Valve (DRV50).
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FRT665DWP80 is a complete pre-piped parallel (redundant) double wall instantaneous steam/water shell and tube heater. The assembly includes two 665 instantaneous Flo-Rite-Temp water heaters with a Digital Recirculating Valve (DRV80).
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FRT8120DWP80 is a complete pre-piped parallel (redundant) double wall instantaneous steam/water shell and tube heater. The assembly includes two 8120 instantaneous Flo-Rite-Temp water heaters with a Digital Recirculating Valve (DRV80).
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FRT53540BS is a complete pre-piped single wall instantaneous steam/water shell and tube heater. The assembly includes a535 instantaneous Flo-Rite-Temp water heater with a Digital Recirculating Valve (DRV40) and BS - Connectivity Module.

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