Handles the air-side heat transfer
This is where the heating-cooling load is transferred to the air in air handling units, fan coils and ductwork lines. The fin surface provides far more heat transfer area within the same volume.
Product group 08
Coils & Batteries
Heating, cooling and steam coil batteries; finned-tube coils and radiators. For air handling units, ductwork, process systems and space heating applications.
CapacityProject-specific
FluidWater, glycol, DX, steam
Fin materialAluminum / copper
Tube materialCopper / stainless
Finned-tube battery · air flows vertically, fluid flows horizontally
Why it's needed
What does this group do in the installation?
Most of the heat exchange between air and water, glycol, DX or steam passes through these products. The right choice depends as much on fin construction and fluid compatibility as it does on capacity.
One body, adaptable to three regimes
Heating, cooling and steam batteries work on the same principle; what differs is the tube-fin material and operating pressure. The right combination is selected for the circuit.
Extends into process and space-heating applications
Finned coils aren't limited to HVAC; they're used in process lines for heating-cooling air, while radiators are used directly for space heating.
Material selected by fluid
Water, glycol, DX and steam each call for a different tube-fin combination. The wrong material choice accelerates corrosion and efficiency loss; the right choice determines lifespan.
Types
Which type, for which job?
All are used for heat transfer, but their roles and construction differ. The right choice is made based on fluid type, capacity, temperature-pressure conditions, air flow rate, fin construction and application environment.
Heating, cooling & steam batteries
Finned-tube heat exchangers used for heating or cooling air in air handling units and ductwork systems. Boru-fin material, row count and circuiting are determined by capacity and operating conditions.
- Common construction: copper tube / aluminum fin
- Row count, fin spacing and circuiting selected by capacity
- Options suited to hot water, chilled water, glycol, DX and steam applications
Finned-tube coils
A heat exchanger type that increases the air-side heat transfer area through fins attached to the tube surface. Widely used for heating and cooling in HVAC and industrial processes.
- Fin spacing selected by operating conditions
- Copper, aluminum, stainless and special tube options
- Single or multi-circuit design
Radiators
Terminal heaters that transfer heat from a hot fluid to the space through natural convection and thermal radiation. Can be used for space heating in technical rooms, workshops, warehouses and industrial areas.
- Natural convection + radiation
- Low maintenance need
- Suited to local and space-heating applications
Selection criteria
What data determines the right product?
Capacity alone isn't enough. Once the six items below are clear, the selection narrows to a single model.
ParameterWhy it mattersWhat we need from you
Heating / cooling capacity
Air flow rate together with inlet-outlet temperatures determine capacity. An undersized battery won't reach the target temperature.
kW and air flow rate (m³/h)
Fluid type and regime
Water, glycol mix, DX (refrigerant) or steam; each requires a different tube diameter, fin spacing and circuit design.
Water / glycol / DX / steam
Temperature and pressure conditions
Steam batteries need high pressure and temperature ratings; in DX, operating pressure changes tube wall thickness and material class.
°C and bar
Air flow rate and face velocity
Fin spacing and row count are optimized around air face velocity. The wrong choice brings either pressure loss or inadequate transfer.
m³/h and m/s
Tube and fin material
Copper, aluminum, stainless or a special alloy; selected based on fluid chemistry and the environment's corrosive effect.
Copper / aluminum / stainless
Connection size and mounting orientation
Entry clearance into the duct or air-handler casing, connection size, and mounting orientation (horizontal/vertical) need to be clear from the start.
DN sizes + mounting orientation
This much is enough for a quote
You don't need all of it. We'll work out anything missing together with you.
Create a quote request- Heating/cooling capacity (kW)
- Air flow rate and inlet-outlet temperatures
- Fluid type (water, glycol, DX, steam)
- Operating pressure and temperature
- Duct/air-handler connection size
- Mechanical project or specification, if available
FAQ
Questions from the field
The four questions we hear most often at the quote stage.
Battery, coil, or radiator?
All three work on the same principle: transferring a fluid's heat to air or to the space. Batteries and coils operate inside ductwork with forced air flow; a radiator heats a space directly through natural convection. The application environment (inside a duct vs. inside a room) determines the choice.
What's the difference between a DX battery and a water battery?
In a water battery, liquid water or a glycol mix circulates in the circuit. In a DX (direct expansion) battery, the refrigerant changes phase directly inside the tubes; it's generally used in split/VRF systems, and tube diameter and circuit count are calculated differently.
What determines fin spacing?
Tighter fin spacing gives more surface area but increases pressure loss and becomes more sensitive to fouling. Wider fin spacing is preferred in high-dust environments and outdoor-air batteries; tighter spacing increases efficiency in clean indoor applications.
How does a steam battery differ from the others?
Steam releases its heat as it condenses, so tube diameter, condensate drainage and material selection are designed differently than for water/glycol batteries. It's usually planned with thicker steel tube and a steam trap.
Next step
Let's work out the capacity together
Share the air flow rate, temperature range and fluid type, and let's work out the right battery or coil together.