chillersPenguin Chillers
1/2 HP Water Chiller
The standard indoor-use 1/2 HP Penguin chiller, rated at 5,000 BTU/h.
Operating range37–100°F with water
Active AquaAACH50HP 1/2 HP Chiller
chillers
Active Aqua AACH50HP 1/2 HP Chiller
A titanium-evaporator water chiller rated at 4,020 BTU/h, sized by the manufacturer for 90–172 gal reservoirs.
Manufacturer price checked August 14, 2026$1,099
The Amazon link is an affiliate link. We do not quote Amazon prices, so check the current one there. Confirm price, shipping, voltage, and availability with the seller.
Active Aqua chillers are hydroponics equipment repurposed for plunges, which is why they are cheaper per BTU than purpose-built plunge chillers. The tradeoff is real: Hydrofarm rates them for indoor use only and publishes no temperature setting range, so they suit a sheltered 90–172 gal setup rather than an exposed patio.
Product details
Price, size, power, and key specs
| Specification | Published value | Source |
|---|---|---|
| Product type | Water chiller with power boost | Verified factView source · checked 2026-08-14 |
| Cooling capacity | 4,020 BTU/h | Verified factView source · checked 2026-08-14 |
| Recommended volume | 90–172 gal | Verified factView source · checked 2026-08-14 |
| Flow rate | 800–1,600 GPH | Verified factView source · checked 2026-08-14 |
| Electrical | 120V; 60Hz; 5.4A | Verified factView source · checked 2026-08-14 |
| Rated power | 510WSome marketplace listings claim 1000W; the manufacturer states the rated figure shown here. | Verified factView source · checked 2026-08-14 |
| Dimensions | 19 × 14 × 19 in | Verified factView source · checked 2026-08-14 |
| Weight | 48.5 lb | Verified factView source · checked 2026-08-14 |
| Evaporator | Titanium | Verified factView source · checked 2026-08-14 |
| Refrigerant | R134a | Verified factView source · checked 2026-08-14 |
| Connections | ½-in, ¾-in and 1-in fittings | Verified factView source · checked 2026-08-14 |
| Temperature range | Not publishedHydrofarm publishes a performance chart rather than a temperature setting range. | Not publishedView source · checked 2026-08-14 |
| Installation | Indoor use only | Verified factView source · checked 2026-08-14 |
| Heating | No | Verified factView source · checked 2026-08-14 |
| Warranty | 1 year | Verified factView source · checked 2026-08-14 |
| Published price | 1099 | Verified factView source · checked 2026-08-14 |
Who is it best for?
- Reservoirs of 90–172 gal
- Titanium evaporator
- Lower cost per BTU than plunge-specific chillers
What should you know before buying?
- Indoor use only
- No published temperature range
- Pump and filtration sold separately
What should you confirm with the seller?
Check the current price, delivery area, voltage, included equipment, installation requirements, warranty, and return costs. Published temperature and cooling figures remain manufacturer claims unless independently measured.
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