How it works
The fans lie in the bar with their intakes facing down and blow upwards into the radiator fins. A thermal switch on the flow pipe turns them on once the radiator reaches 40 °C and off when it is cold. Power is 5 V USB only: there is no 220 V inside. On a power bank the fans keep working during power cuts while the radiators are still warm.
What it actually gives — honestly
By our estimate, the radiator delivers 15–25 % more heat into the room with water at 60/45 °C, based on a Lund University model. With hotter water the gain is smaller; with low-temperature heating it is larger. We do not promise savings on gas or bills: the fan adds no heat, it only moves the heat already in the radiator into the room faster.
The plastic never touches hot metal
A radiator reaches 60–80 °C, and PETG softens at around 70 °C, so no plastic part touches the metal. The bar sits in the coolest airflow in the room — under the radiator, with an 8–14 mm air gap. By calculation, with the bottom of the radiator at 80 °C the bar reaches 33 °C while the fans run, and 54 °C if they stop. In the magnet version only the steel magnets touch the radiator, and the hook sits in a silicone sleeve.
Which version to choose
- Any radiator — “On feet”: touches nothing, the legs are matched to the height.
- Floor cleaning or a robot vacuum under the radiator — “On magnets” (steel or cast iron) or on S-hooks (bimetal).
- A type 11 radiator or a narrow alcove — “Slim”.
- A long radiator of 1.2–2 m — the “Set”.
- A short bimetal radiator with 4–6 sections — “Compact”.
Limitations
- Neodymium magnets weaken if the bottom of the radiator is hotter than 75–80 °C. For a very hot radiator, choose the version on feet.
- Use a certified charger, and keep the power bank on the floor to the side, not on the radiator.
- Under a type 11 radiator a 120 mm fan is wider than the radiator — use the slim 80 mm bar.
LiFePO4 terminal covers“+” and “−” caps for a 16S pack, busbar covers numbered B1…B15, cell spacers, a BMS shelf and balance wire markers.
18650 battery boxA 16-cell case with a lid, dovetail modules, a pocket case, a honeycomb tray, a wall dispenser and trays for workshops.
Tourniquet holderFor MOLLE, for a belt, a universal one with shock cord, a budget sleeve, a pair for two tourniquets and a wall holder for shelters.
POS terminal standsA swivel counter stand, a wall holster, a universal stand, a stand for a phone terminal, a cashier station and stands with your logo.
Printing from your modelSend your model — priced by weight, free quote.