HRSF
SMC HRSF Series — R-454C Low GWP Thermo-Chiller
The HRSF is SMC's R-454C (GWP 146) standard thermo-chiller — the drop-in successor to the legacy HRS series. Seven cooling capacities from 1.3 to 20.5 kW. Air- or water-cooled. ±0.1°C temperature stability. Identical 377 mm width across every model for consistent panel layout. Shop all 144 configurations below.
What Is the HRSF Series?
The SMC HRSF series is a circulating fluid temperature controller (thermo-chiller) that uses R-454C refrigerant with a global warming potential of 146 — well below the EPA 700 GWP cap, CARB 750 GWP cap, and EU F-Gas 150 GWP thresholds for new industrial process chillers. It's engineered as a direct drop-in replacement for SMC's long-established HRS series, matching the legacy footprint, port sizes, cooling capacities, and performance characteristics so existing installations can transition without mechanical rework.
The lineup spans seven cooling capacity bands: 1.3, 1.9, 2.4, 3.2, and 5.9 kW (single-phase medium capacity) plus 15.7 and 20.5 kW (three-phase large capacity). Every model shares the same 377 mm width, simplifying panel and equipment cabinet design across mixed-capacity installations. Both air-cooled and water-cooled configurations are available at each capacity, with extensive option suffixes covering auto water supply, high-pressure pump, DI water piping, anti-vibration mounts, and conversion fittings for NPT or G thread systems.
Typical applications include machine tool and CNC spindle cooling, laser oscillator cooling, welding and induction heating equipment, semiconductor and electronics manufacturing support, and general industrial process cooling where tight temperature control and low-GWP compliance are required.
How to Read an HRSF Model Number
Every HRSF part number follows the same structure. Decoding it tells you the cooling capacity, cooling method, power supply class, and accessory configuration without opening a catalog.
Capacity Code (positions 5-7)
| 012 | 1.3 kW | Single-phase, compact frame (W377×H615×D500) |
| 018 | 1.9 kW | Single-phase, compact frame |
| 024 | 2.4 kW | Single-phase, compact frame |
| 030 | 3.2 kW | Single-phase, compact frame |
| 060 | 5.9 kW | Single-phase, medium frame (W377×H660×D500) |
| 150 | 15.7 kW | Three-phase, large frame (W377×H976×D592) |
| 200 | 20.5 kW | Three-phase, large frame |
Cooling Method (position 8)
W = Water-cooled refrigeration
Pipe Thread (position 9)
N = NPT with Rc-NPT conversion fitting
F = G with Rc-G conversion fitting
Power Supply (positions 10-11)
40 = 3-ph 380-415 VAC (50/60 Hz)
Option Suffix (after final hyphen)
Suffixes combine — for example -AKM = Auto-fill + Caster kit + Anti-vibration, and -MT = Anti-vibration + High-pressure pump.
| Code | Option | When to Specify |
|---|---|---|
| A | Auto fluid fill | Unattended operation with facility water supply |
| K | Caster kit | Mobile deployment, frequent relocation |
| M | Anti-vibration mount | Noise- or vibration-sensitive environments |
| T | High-pressure pump (high head) | Long run-lines, high-flow cooling loops |
| D | DI water piping | Deionized water service, laser and precision loops |
| B | Bypass valve | Flow-variable downstream loops, pressure protection |
| Y | Flow sensor | Process monitoring, flow alarm integration |
HRSF Specifications by Capacity
| Model | Cooling | Power | Dimensions (W×H×D) | Temp Range | Stability |
|---|---|---|---|---|---|
| HRSF012 | 1.3 kW | 1-ph 200-230V | 377 × 615 × 500 mm | 5-35°C | ±0.1°C |
| HRSF018 | 1.9 kW | 1-ph 200-230V | 377 × 615 × 500 mm | 5-35°C | ±0.1°C |
| HRSF024 | 2.4 kW | 1-ph 200-230V | 377 × 615 × 500 mm | 5-35°C | ±0.1°C |
| HRSF030 | 3.2 kW | 1-ph 200-230V | 377 × 615 × 500 mm | 5-35°C | ±0.1°C |
| HRSF060 | 5.9 kW | 1-ph 200-230V | 377 × 660 × 500 mm | 5-35°C | ±0.1°C |
| HRSF150 | 15.7 kW | 3-ph 380-415V | 377 × 976 × 592 mm | 5-40°C | ±0.1°C |
| HRSF200 | 20.5 kW | 3-ph 380-415V | 377 × 976 × 592 mm | 5-40°C | ±0.1°C |
Cooling capacity values at 20°C circulating fluid temperature, 25°C ambient. Temp range and capacity vary with coolant type (tap water vs ethylene glycol). Full datasheet: SMC Catalog CAT.EUS40-77A.
Compliance, Compatibility, and Continuity
Legacy HRS Drop-In, Zero Redesign
- Matching dimensions, port sizes, and capacities to legacy HRS models
- Same 377 mm width across all capacities for consistent panel planning
- Heating function included — one unit handles chill and warm
- RS-232C / RS-485 serial communication and 2-in / 3-out contact I/O standard
- 24 VDC output available for flow switch integration (e.g., SMC PF2W)
Below Every Major 2026+ Threshold
- GWP 146 — below EU F-Gas 150 cap, EPA AIM Act 700 cap, CARB 750 cap
- R-454C is an A2L (lower flammability) refrigerant with slow burn rate
- Certified UL (C-ETL-US), CE, UKCA, and RoHS compliant
- Eligible for ESG / CDP refrigerant-impact reporting (Scope 1)
- Reduces equipment-replacement risk as regulations continue tightening
Applications Across the HRSF Range
Machine Tool / CNC
Spindle, coolant, hydraulic, and lubricant cooling on machining centers and grinders. HRSF018 – HRSF060 cover most platforms.
Laser & Welding
Oscillator, power supply, and optical head cooling for fiber and CO₂ lasers. DI water piping option (-D) for precision loops.
Induction Heating
Work coil and power supply cooling for RF and induction heating systems. HRSF024 – HRSF200 depending on load.
Electronics Mfg
Wave solder, reflow, and SMT line auxiliary cooling. HRSF012 – HRSF030 for most station-level needs.
Plastics / Extrusion
Mold, platen, and feed-zone cooling for injection and blow molding. HRSF060 – HRSF200 for large tools.
Medical Device Mfg
Catheter, implant, and device assembly process cooling. Anti-vibration (-M) for noise-sensitive clean environments.
Analytical Instruments
Chromatography, spectrometer, and analytical lab equipment. HRSF012 – HRSF024 most common.
General Process
Any closed-loop industrial cooling where ±0.1°C stability and R-454C compliance both matter.
HRSF vs. Other SMC Low GWP Series
HRSF Wins
Ideal for: drop-in replacement of legacy HRS units, general-purpose process cooling 1.3 – 20.5 kW, facilities comfortable with A2L.
You're on the right page.
Try HRSC (CO₂) Instead
If you need: absolute lowest GWP (1 vs 146), A1 non-flammable classification, air-freight eligibility, or strict no-flammable facility policy.
Browse HRSC →Try HRSHF (R-32) Instead
If you need: larger capacity (up to 30.5 kW), inverter-driven energy savings, outdoor IPX4 rating, seal-less immersion pump, or global voltage compatibility.
Browse HRSHF →Try HRRF or HRZC Instead
If you need: 19″ rack-mount form factor (HRRF, 1.2 – 1.8 kW) or SEMI-certified semiconductor fab use with fluorinated fluids (HRZC).
Browse Low GWP →HRSF Series: Common Questions
Is the HRSF a direct replacement for a legacy HRS chiller?
Yes. SMC engineered the HRSF as a drop-in successor to the HRS series, matching dimensions, port sizes, cooling capacities, and performance so existing installations can transition without piping, panel, or electrical rework. Confirm your exact HRS part number against the HRSF replacement chart before ordering, or contact our team for mapping assistance.
What refrigerant does the HRSF use and is it safe?
HRSF uses R-454C, a hydrofluoroolefin (HFO) blend with a GWP of 146 — below EU F-Gas (GWP 150), EPA AIM Act (GWP 700), and CARB (GWP 750) thresholds. R-454C is classified A2L (lower flammability) under ASHRAE Standard 34, with a high ignition energy and slow burn velocity that make it substantially safer than A2 or A3 refrigerants. It's widely adopted across global HVAC and process cooling. Facilities with a no-flammable-refrigerant policy should specify the HRSC (CO₂, GWP 1, A1 non-flammable) instead.
Can the HRSF be shipped by air freight?
No. R-454C is classified as flammable under IATA dangerous-goods rules and is not eligible for air transport. If air freight is required for your deployment, the HRSC series (CO₂ refrigerant) is air-freight eligible and covers the same 1.3 – 5.9 kW capacity range.
What's the difference between HRSF012 and HRSF060?
The numeric code indicates cooling capacity in approximate hundreds of watts at 20°C fluid / 25°C ambient. HRSF012 is a 1.3 kW unit suitable for small machine tool and analytical lab loads. HRSF060 is a 5.9 kW unit for larger machining centers, laser systems, and process loops. All share the 377 mm width; only the height changes by frame size. Between them are 018 (1.9 kW), 024 (2.4 kW), and 030 (3.2 kW).
What's the difference between air-cooled and water-cooled HRSF models?
Air-cooled models (suffix A) dissipate condenser heat directly into ambient air through integrated fans — simpler installation, no facility water required. Water-cooled models (suffix W) reject heat to a facility water loop or cooling tower — higher efficiency at high loads, quieter operation, and more stable performance in hot ambient environments. Choose water-cooled when facility water is available and ambient temperature exceeds 32°C, or when fan noise is a concern.
What coolants can I run through the HRSF?
Standard configuration supports tap water meeting the Japan Refrigeration & Air Conditioning Industrial Association (JRAIA) GL-02-1994 circulating water quality standard, plus ethylene glycol solutions. For deionized water service, specify the DI water piping option (-D), which uses copper-free wetted materials to prevent copper leaching. Glycol concentration affects minimum fluid temperature: maintain an appropriate concentration to prevent freezing below 10°C, and keep concentration from climbing too high to avoid pump overload.
Does the HRSF include communication for factory integration?
Yes. Every HRSF ships with RS-232C and RS-485 serial communication plus 2 contact inputs and 3 contact outputs as standard. A 24 VDC output is also provided for direct integration with flow switches (e.g., SMC's PF2W series) and other auxiliary sensors. This lets the chiller report status, alarm conditions, and operating parameters to a PLC or HMI without additional gateway hardware.
Are HRSF models IPX4 rated for outdoor installation?
The HRSF150 and HRSF200 large-capacity models carry IPX4 outdoor rating. The smaller single-phase capacities (HRSF012 through HRSF060) are rated for indoor installation only — these are not designed for exposure to rain or snow. For outdoor-rated smaller capacities, consider the HRSHF smart inverter series, which offers IPX4 outdoor rating across its range.
How do I choose the right HRSF configuration for my application?
Use the faceted filters on the left to narrow by cooling capacity, cooling method, power supply, pipe thread, and option combinations — this resolves most selection decisions in a few clicks. If you're replacing a legacy HRS unit, share your current model number and we'll map it to the correct HRSF successor. For new installations, share heat load (kW), set-point temperature, process fluid type, and facility constraints (indoor/outdoor, power, noise) and we'll recommend the exact SKU. You can also use the SMC Thermo-Chiller Model Selection Software to configure online.
All 144 HRSF SKUs Are Below
Use the left-side filters to narrow by cooling capacity, cooling method, pipe thread, power supply, and option suffix. The most common starting points:
Replacing a Legacy HRS Unit?
Share your current HRS part number and we'll map it to the exact HRSF successor — including matching option suffixes for auto-fill, high-pressure pump, DI water, or anti-vibration configurations.
Request a HRS → HRSF Mapping → Browse All Low GWP Chillers →Verify all specifications against current SMC HRSF documentation (catalog CAT.EUS40-77A, operation manual DOC1055019) prior to installation. Specifications subject to change without notice. R-454C classification per ASHRAE Standard 34. GWP value per IPCC AR6. Automation Distribution is an authorized SMC distributor.