Hydronic Fan Heater, Up to 600 Thermal Watts, About 2,000 BTU/hr

The PiggyPower HeatBank 600 lets you take hot water and blow that stored heat into a room. Hot water goes in, the fan pulls air through the radiator, and warm air comes out. It is a simple way to turn a hot water loop, bucket, tank, or PiggyPower cooling system into usable space heat.

Rated output is up to 600 thermal watts, which is about 2,000 BTU/hr. This is heat output, not electrical output. Actual heat output depends on water temperature, room temperature, water flow, and airflow. Hotter water and colder room air can increase output. Cooler water and warmer room air will reduce output.

The fan is powered separately through USB. The HeatBank 600 includes a 5 V USB to 12 V step-up adapter, so you can plug the fan into a normal USB power bank, USB outlet, or other suitable 5 V USB source. The fan itself only draws about 1.08 watts at 12 volts, so it takes very little power to run. A regular power bank can run the fan for many hours, and in most setups you will run out of stored heat long before you run out of fan power.

This is not an electric space heater. It does not create heat from electricity. It uses heat that is already stored in hot water and releases it into the room through a radiator and fan. In plain English, the water acts like the heat storage, and the HeatBank releases that stored heat when you want it.

WHAT IT DOES

The PiggyPower HeatBank 600 is a compact hydronic fan heater. Hydronic simply means it moves heat using water.

You circulate hot water through the HeatBank. The internal radiator pulls heat out of that water. The fan pushes air through the radiator and blows warm air into the room.

Simple version:

Hot water goes in.
Warm air comes out.
Cooler water returns to the loop.

This makes the HeatBank useful for PiggyPower systems, off-grid heating, blackout setups, cabins, sheds, workshops, emergency thermal storage, and any controlled hot-water loop where you want to turn stored heat into usable room heat.

USB POWERED FAN

The HeatBank 600 does not need a wall outlet to move air. The fan is low-power and can run from a normal USB power bank using the included 5 V to 12 V step-up adapter.

The fan is powered separately on purpose. This gives you steady, dependable airflow while the unit is heating, instead of relying on changing water temperature or unstable power. It also makes the unit easier to use with small batteries, USB power banks, and PiggyPower setups.

Fan draw: about 1.08 W at 12 V
Power input: standard 5 V USB using included step-up adapter
Power source: USB power bank, USB outlet, or other suitable USB source
Power bank: not included unless specifically selected or shown

For context, a small power bank stores far more energy than this fan needs for a normal heating run. Even after normal conversion losses, a power bank can run the fan for many hours. In a full PiggyPower setup, a PiggyPower Cell may also help recharge the USB battery while the HeatBank is being used.

WHY IT IS CALLED THE HEATBANK 600

The 600 in HeatBank 600 refers to the unit’s estimated heat rejection rating under favorable cold-room conditions.

In testing, this 1 fan radiator setup rejected about 350 to 360 watts of heat in a 77°F room with water averaging around 117°F. When the same water temperature is used in a colder room, around 50°F ambient, the larger temperature difference allows the radiator to reject more heat. That scales to about 600 thermal watts, or roughly 2,000 BTU/hr.

That is why this model is called the PiggyPower HeatBank 600.

The exact number is not fixed like a normal electric heater. A normal 600 watt electric heater is always dumping about 600 watts of heat when running. The HeatBank is different because it depends on the hot water feeding it. With hotter water, colder air, better flow, or stronger airflow, output can be higher. With cooler water, warmer air, weak flow, or blocked airflow, output will be lower.

BEST USES

The HeatBank 600 is best used for:

Off-grid heating experiments
Blackout and emergency preparedness
Small room, shed, cabin, or workshop heating support
PiggyPower CHP-style systems
Releasing stored heat from hot water
Pulling heat out of a PiggyPower water loop
Testing thermal storage setups
Turning hot water into forced-air heat

This unit is especially useful when you already have hot water available and want a controlled way to move that heat into the air instead of letting it sit in a bucket, tank, or loop.

PIGGYPOWER SYSTEM USE

In a PiggyPower setup, heat can be used in more than 1 way. A PiggyPower Cell can produce electricity from a heat source while the water loop carries away heat. The HeatBank 600 gives that hot water another job by letting it release heat into the room.

That means 1 heat source can potentially support multiple useful outputs:

Electricity from the PiggyPower Cell
Hot water in the loop
Room heat through the HeatBank
USB fan power that can be supported by a small power bank

The HeatBank 600 is 1 piece of that larger PiggyPower heat recovery system.

WHAT IS INCLUDED

1 fully assembled PiggyPower HeatBank 600 unit
1 radiator-style heat exchanger
1 mounted 12 V fan
Installed housing
Inlet and outlet water connections
1 included 5 V USB to 12 V step-up adapter
Basic setup and operating instructions

Hot water source, PiggyPower Cell, pump, battery, fuel, stove, bucket, tank, external tubing, and full loop hardware are not included unless specifically shown or selected.

THERMAL OUTPUT

Rated class: up to 600 thermal watts
Approximate BTU/hr equivalent: about 2,000 BTU/hr
Heat type: hydronic forced-air heat
Fan count: 1
Fan power draw: about 1.08 W at 12 V
Fan power method: USB powered through included 5 V to 12 V step-up adapter
Function: pulls heat from hot water and blows it into the room

Important note: 600 thermal watts does not mean 600 watts of electrical output. This unit does not generate electricity. It is rated by how much heat it can release into the room under favorable conditions.

PHYSICAL SPECIFICATIONS

Model: PiggyPower HeatBank 600
Fan count: 1
Thermal class: up to 600 Wth
Approximate BTU/hr: about 2,000 BTU/hr
Fan voltage: 12 V
Fan draw: about 1.08 W
Included fan adapter: 5 V USB to 12 V step-up adapter

Approximate body dimensions:
Height: just under 7 in
Width: about 5.75 in
Depth: about 3.25 in

BUILD AND SHIPPING INFORMATION

PiggyPower units are built to order in small batches. Minor cosmetic differences may exist between units, but all performance and function remain the same.

Includes Limited Workmanship Warranty and access to the PiggyPower Lifetime Service Rebuild Program. See the Warranty, Terms, and Service Policy for full details.

Please see the shipping page for current shipping information.