The Grundfos CRE 45 Variable-Speed E-Pump (CRE 45) is part of the Grundfos CRE range, engineered in Cast iron / 304 stainless with E-motor. Drive: Integrated MLE IE5 permanent-magnet motor with onboard variable frequency drive (VFD). Used in Constant pressure water supply and similar applications.
Specifications
| Construction | Cast iron / 304 stainless with E-motor |
| Motor | Integrated MLE IE5 permanent-magnet motor with onboard variable frequency drive (VFD) |
| Brand | Grundfos |
| Model | CRE 45 |
| Country of Origin | Denmark / USA (varies by model) |
Materials of Construction
Cast iron head & base; 304 stainless internals
Typical Applications
- Constant pressure water supply
- variable-flow process water
- HVAC chilled/condenser water
- boiler feed with modulating control
- irrigation
Datasheets & Manuals
Industries & Applications
The Grundfos CRE 45 is widely deployed across these industries and use cases:
- Constant-pressure water supply to commercial buildings
- Closed-loop chilled water circulation in hvac
- Variable-flow chilled water pumping
- Irrigation with variable demand
- Reverse osmosis with variable recovery rate
- Modulating boiler feed control
- Process water with variable demand
Related & Compare
Frequently Asked Questions
- What materials of construction are available for the CRE 45?
- Cast iron head & base; 304 stainless internals
- What applications is the Grundfos CRE 45 suitable for?
- Constant pressure water supply, variable-flow process water, HVAC chilled/condenser water, boiler feed with modulating control, irrigation
- Is dry-run protection available?
- Yes - the Grundfos LiqTec sensor mounts inside the pump head and shuts down the pump if it detects dry running. Standard on most CRE configurations.
- Is the Grundfos CRE 45 available with stock or quick-ship lead times?
- Many configurations ship from stock through Grundfos USA. Contact ForeverPure Place for current lead time on your specific configuration.
- How do I get a quote for the Grundfos CRE 45?
- Use the Request Quote button on this page, call our sales team, or email sales@foreverpureplace.com with model, voltage, materials, seal type and quantity.
Need help selecting the right CRE 45 configuration, NEMA motor, materials or seal type? Contact our pump engineering team for sizing assistance, pricing and lead times.
Accessories for This Pump
Commonly specified alongside Grundfos E-pumps. Send us your pump nameplate and we will confirm the correct part for your exact build and voltage before you order.
- RPI Inlet Pressure Sensor
Inlet pressure protection with low-suction shutdown. 
VFS Flow & Temperature Sensor
Flow and temperature feedback to the pump’s onboard controller.- RPS Pressure Sensor
Discharge pressure feedback for constant-pressure booster control.
Building-automation connectivity
This pump accepts a Grundfos CIM interface card (or an external CIU box) to report to a BMS or PLC. All eight are the same card with a different protocol — choose the one your building system speaks:
CIM/CIU 100 GENIbus · CIM/CIU 150 PROFIBUS DP · CIM/CIU 200 Modbus RTU · CIM/CIU 250 Modbus TCP · CIM/CIU 300 BACnet MS/TP · CIM/CIU 500 EtherNet/IP · CIM/CIU GRM · CIM/CIU LonWorks