Aquarium Chiller Thermoelectric vs Compressor Glossary Guide
Aquarium chiller types glossary in fifty words: aquarium chillers split into two families — thermoelectric Peltier units (small, low capacity, low cost) and compressor-based refrigeration units (high capacity, expensive, vapour-compression cycle). Thermoelectric chillers handle nano tanks under 100 litres; compressors handle anything from 200 to 2000+ litres. The aquarium chiller types glossary matters most in Singapore’s tropical climate where ambient hits 31°C and most cool-water species need active cooling, which this Gensou Aquascaping guide from 5 Everton Park breaks down.
Thermoelectric Peltier Chillers
Peltier chillers exploit the thermoelectric effect — passing DC current through dissimilar semiconductor junctions creates a temperature differential across the device. One side cools, the other heats; a fan dumps heat into the room while a copper block transfers cold to flowing water. Capacity sits at 10-50 W of cooling, enough to drop a 30-60 litre tank by 4-6°C below ambient. Prices run SGD 80-200.
Compressor-Based Chillers
Compressor chillers use the same vapour-compression cycle as your fridge or air-conditioner. A compressor pumps refrigerant (R134a or R410a) through an evaporator coil where it expands and absorbs heat, then condenses outside the unit dumping heat to ambient. Cooling capacity ranges from 100 W (Hailea HC-130A, suits 200 L) to 1500 W (Teco TR60, suits 2000+ L). Prices run SGD 500-2500+.
Cooling Capacity Comparison
A Peltier 50 W unit produces about 170 BTU/hr; a Hailea HC-150A compressor unit produces 700 BTU/hr at 1/4 HP; a Teco TK1000 at 1/4 HP produces similar capacity but with better efficiency. Compressor COP (coefficient of performance) sits at 2.5-4.0, meaning each watt of electricity removes 2.5-4 watts of heat. Peltier COP is 0.4-0.6 — they consume more power than they cool. Browse the aquarium chiller and equipment range for both types.
When Peltier Makes Sense
Nano shrimp tanks under 50 litres rarely justify a SGD 600 compressor. A SGD 130 Peltier unit dropping ambient by 4°C keeps caridina at 22-24°C in an air-conditioned room. The trade-off: Peltier units run continuously and consume 80-120 W steady — over a year that’s SGD 200-300 in electricity. Compressors cycle on-demand, averaging much less.
Why Compressors Dominate Mid-Sized Tanks
Tanks 100-1000 litres — which covers most reef and discus setups — need 200-800 W cooling capacity. Peltier scaling tops out at 100 W per unit; stacking multiple Peltiers becomes inefficient and noisy. A single Hailea HC-300A or Teco TK500 covers the range cleanly with one compressor cycle averaging 150-300 W draw.
Inverter vs Fixed-Speed Compressors
Recent compressor chillers like the Teco TK Series II and IceProbe IP-1000 use inverter-driven compressors that vary speed to match cooling demand. Inverter units run quieter, last longer and consume 20-30 per cent less power. Fixed-speed compressors cycle harder on-off, generating more vibration noise that transmits through HDB floors to neighbouring units.
Plumbing and Flow Requirements
Both chiller types need a dedicated water loop. Compressor units typically require 1500-3000 L/h flow through 3/4 to 1-inch tubing, run inline between sump and return pump. Peltier chillers run lower flow (300-800 L/h) on 1/2-inch tubing. Insulate hoses with foam pipe wrap to prevent condensation drip in HDB humidity.
Singapore Ambient and Sizing
Singapore HDB ambient runs 28-31°C year-round. Cool-water species needing 22°C therefore demand a 6-9°C drop — at the upper end of chiller capability. Size up by 25 per cent over rated capacity to handle worst-case July-August heat. Cardinal tetra and rummy-nose tanks at 26-27°C need only modest cooling; cherry shrimp and crystal red shrimp tanks at 22-24°C need the larger compressor.
Local Pricing and Sourcing
Hailea, Teco, Resun and Aquazonic chillers stock at Gensou and major aquarium shops. The Hailea HC-130A at SGD 480-560 is the entry compressor for 200 L tanks. Teco TK500 at SGD 850-1100 handles 500 L. Premium Teco TR Series with inverter tech runs SGD 1500-2500. Most units carry 1-year local warranty; extended 3-year coverage costs SGD 80-150 extra.
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