Overwinter warm-water species
Holds water in the optimal window (typically around 26–30 °C) so tilapia, catfish and shrimp keep feeding and growing through winter.
Fish Tank Heating Equipment
An aquaculture water heater holds pond, tank or RAS water at the temperature tilapia, catfish and shrimp need to keep feeding through winter. The heat-pump type runs at COP 4–6, and a titanium-tube heat exchanger handles seawater directly with precision temperature control to ±1 °C.
- Heating output~10–250+ kW
- EfficiencyCOP 4–6 (heat-pump type)
- ExchangerTitanium tube — seawater direct
- Control±1 °C
ISO 9001 CE OEM / ODM
15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container
Product Description
Protective Devices: missing phase and Undervoltage, phase dislocation, compressor overload, water pump overload protection, etc. It can alarm and display faults at any time.
2.Microcomputer temperature control system: temperature controllable range + 5° C to + 35 ° C, accuracy 0.1°C.
Advantage:
- Protective Devices: missing phase and Undervoltage, phase dislocation, compressor overload, water
- pump overload protection, etc. It can alarm and display faults at any time.
- Microcomputer temperature control system: temperature controllable range + 5° C to + 35 ° C, accuracy 0.1°C.
- Air-Cooled condenser: dense structure, small size exchange large heat and save water.
- The machines can both cool and heat.
Application
Specifications
Models & configuration
Output and COP ranges integrated from industry practice — final specifications and heating method are confirmed by SIGMA's production line per project.
| Model | Capacity | Typical use | Core configuration |
|---|---|---|---|
| SIGMA-HP-10 | ~10 kW | Small tanks / holding | Heat pump / electric · COP 4–5 |
| SIGMA-HP-30 | ~30 kW | Small–mid farms | Heat pump / electric · COP 4–5.5 |
| SIGMA-HP-60 | ~60 kW | Mid-size farms | Heat pump · COP 4.5–6 |
| SIGMA-HP-120 | ~120 kW | Large farms | Heat pump · COP 4.5–6 |
| SIGMA-HP-250 | ~250 kW | Industrial-scale culture | Heat pump · COP 4.5–6 |
| Heating method | Heat-pump heating (air/water source), electric heating or heat-exchanger heating — temperature raising and holding |
|---|---|
| Heat exchanger | Pure titanium tube — corrosion-resistant, seawater can pass directly through the unit (up to ~35,000 ppm salinity) |
| Temperature control | ±1 °C via electronic controller with set-point holding |
| Energy saving (heat-pump type) | 50–70% lower running cost than electric resistance heating; 40–60% lower than oil/gas boilers |
| Water type | Freshwater / saltwater |
| Safety protection | High/low pressure, overload, phase-loss, low-water and exhaust-temperature cut-outs |
| Options | PLC integration, remote monitoring, multi-unit parallel, insulated buffer tank, economy electric-only version |
System composition
Heat-pump efficiency, COP 4–6
Several units of heat per unit of electricity — 50–70% cheaper to run than resistance heating; an economy electric version is also available.
Titanium exchanger, seawater direct
Pure titanium tubing resists corrosion so full-strength seawater passes straight through the unit.
±1 °C precision
Electronic control holds the species' optimal growth temperature steadily.
Multi-layer safety protection
High/low pressure, overload, phase-loss, low-water and exhaust-temperature cut-outs allow unattended operation.
Wide capacity band
From a few kW for small indoor modules to several hundred kW for commercial farms.
Pairs with RAS for cold regions
Steady warm temperature plus low water exchange is what makes intensive all-season production profitable in cold climates. The same titanium exchanger also runs in reverse as a water chiller for fish farm cooling, or a fish pond heat pump for warming — SIGMA sizes either duty from the same platform.
Application
- Winter heating for warm-water species (tilapia, catfish, shrimp) in cold climates and off-season production
- Year-round temperature holding for tilapia RAS and biofloc farms in cold regions
- Stable warm water for hatcheries and nurseries, paired with egg incubators
- Seawater recirculating-system heating
- Winter heating for indoor industrial farms across climate zones, with the same platform available as an aquaculture chiller or aquaculture heat pump for warm-climate cooling duty
FAQ
Frequently asked questions
Why do warm-water fish farms need a heater?
Warm-water species like tilapia, catfish and shrimp feed and grow best around 26–30 °C. When water drops below that in winter they stop eating and growth stalls, so a heater holds the water in that warm window for all-season production.
How energy-efficient is a heat-pump fish heater?
A heat-pump heater delivers a COP of roughly 4–6 — several units of heat per unit of electricity — for about 50–70% lower running cost than plain electric resistance heating.
Can the heater be used with seawater?
Yes — at its core is a titanium-tube heat exchanger that resists corrosion, so fresh water and full-strength sea water can pass directly through the unit.
How precisely does it hold temperature?
An electronic controller holds water temperature tightly, typically within ±1 °C, with multi-layer safety protection for unattended running.
Can the same unit cool the water instead of heating it?
Yes — beyond winter heating, the identical titanium-tube platform runs as an aquaculture chiller or fish pond heat pump, so warm-climate farms use it to pull heat out in summer instead of adding it in winter.
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View details →Request a tailored quote
Tell us your species, target density and site — our engineers size the system and reply within one business day.
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