Active Aqua Chiller 1 HP

The Active Aqua Chiller 1 HP (model AACH100) is a large-capacity water chiller designed for hydroponic reservoirs holding 80 to 250 gallons (300–950 L). Its anti-corrosive pure titanium evaporator makes it suitable for both freshwater and saltwater systems, and the unit handles flow rates of 400–1060 GPH (1500–4000 L/hour) when paired with the appropriate water pump. At 21″L × 15″W × 21″H, it fits alongside most commercial reservoir setups without requiring custom housing.

Active Aqua Chiller 1 HP Specifications

All values below are drawn directly from the manufacturer’s published product data for model AACH100.

Specification	Value
Model	AACH100
Chiller Capacity	1 HP
Recommended Reservoir Volume	80–250 gal / 300–950 L
Rate of Flow	400–1060 GPH / 1500–4000 L/hour
Evaporator Material	Pure titanium (anti-corrosive)
Water Compatibility	Fresh water and salt water
Recommended Pumps	AAPW800 or AAPW1000
Tubing Size	1″ — compatible part: HGTB100
Unit Dimensions	21″L × 15″W × 21″H

Why Choose the Active Aqua Chiller 1 HP

Water temperature is one of the more consequential variables in a hydroponic system. Nutrient uptake, dissolved oxygen levels, and root-zone health all shift meaningfully once reservoir temps climb above recommended ranges. The AACH100 addresses this at scale — it is sized for reservoirs up to 250 gallons, which puts it well beyond the range of small aquarium-style chillers.

• Large refrigeration capacity: Designed for reservoirs of 80–250 gallons (300–950 L), the AACH100 covers multi-table and rack-based recirculating systems that smaller chillers cannot handle.
• Pure titanium evaporator: Titanium resists corrosion in both freshwater nutrient solutions and saltwater applications. This matters for long-term maintenance, as a corroding evaporator introduces contamination and requires early replacement.
• Broad flow compatibility: The unit operates across a wide flow range — 400 to 1060 GPH — giving growers flexibility in pump selection and plumbing layout. Active Aqua recommends pairing it with their AAPW800 or AAPW1000 water pumps for matched performance.
• Known plumbing requirements: The 1″ inlet/outlet (HGTB100 tubing) is a standard size in commercial hydroponic plumbing, simplifying integration into existing irrigation circuits.
• Defined physical footprint: At 21″ × 15″ × 21″, the unit has a published footprint you can plan around before purchasing — useful when floor space in a grow room is allocated in advance.

Best Uses for the Active Aqua Chiller 1 HP

The AACH100 is appropriate when the reservoir volume and ambient environment create cooling demands that smaller-capacity units cannot meet. The following scenarios reflect the product’s rated capacity and design parameters.

• Large recirculating hydroponic systems: NFT, DWC, and ebb-and-flow setups with combined reservoir volumes in the 80–250 gallon range are the primary target application. These systems recirculate the same nutrient solution continuously, so heat accumulation is a persistent concern during warm months.
• Multi-site deep water culture arrays: Growers running several interconnected DWC buckets or totes from a central reservoir benefit from a single high-capacity chiller rather than multiple smaller units.
• Saltwater and marine recirculating systems: The titanium evaporator makes the unit viable for salt-based solutions, which would corrode standard copper or stainless steel components over time.
• Commercial and semi-commercial grow rooms: Operations where reservoir temperature management is part of a climate control strategy — alongside HVAC and dehumidification — rather than an afterthought.
• Warm-climate indoor grows: In facilities where ambient room temperature regularly exceeds comfortable ranges for root-zone health, an inline chiller in the reservoir circuit provides consistent cooling independent of room HVAC capacity.

For reservoir systems that need clean, filtered water before it enters the chilling circuit, a 1-1/2″ inline filter with 200-mesh screen placed upstream of the chiller inlet can help protect the evaporator from particulate debris.

Compatibility & Operating Range

The AACH100 is designed to integrate into a recirculating hydroponic water circuit as an inline chiller. The following compatibility notes are based on the manufacturer’s published product specifications.

Water type: The titanium evaporator supports both fresh water and salt water. This includes standard hydroponic nutrient solutions (which are slightly saline due to dissolved mineral salts) and true saltwater or marine systems.

Flow rate window: The chiller requires a pump delivering 400–1060 GPH (1500–4000 L/hour) through the unit. Active Aqua specifies the AAPW800 and AAPW1000 submersible pumps as compatible pairings. If you are already running an Active Aqua air pump for reservoir oxygenation, the AAPW-series water pump fits within the same product ecosystem and uses the same plumbing conventions.

Tubing: The inlet and outlet ports accept 1″ tubing. Active Aqua designates HGTB100 as the compatible tubing part number. This is a common diameter in commercial hydroponic plumbing and is widely available.

Reservoir volume: The unit is rated for reservoirs of 80–250 gallons. Systems below 80 gallons are better served by a lower-capacity chiller; systems above 250 gallons may require a unit with higher BTU output or multiple chillers in a staged circuit.

Physical clearance: At 21″L × 15″W × 21″H, the unit needs floor space adjacent to the reservoir with enough clearance for airflow around the condenser. The unit should not be enclosed in a tight cabinet without ventilation, as heat rejection from the condenser coil must have somewhere to go. For water quality upstream of the chiller, consider a compact reverse osmosis system to reduce dissolved solids and mineral scaling in the evaporator over time.

Sources & Further Reading