Run Around Coils
Matched run around coils engineered and manufactured in the UK for efficient heat recovery and summer free cooling in AHU and HVAC systems.
Technical Specifications
Fluid
Water-Glycol
Tube Material
Copper
Fin Material
Al, AluP, Cu, Cu-ET
Connections
BSP / PN16 Flanged
Matched Pairs
Supply + Extract
Bespoke Run Around Coil Design
HC Coils Run Around Coils are designed to deliver high thermal performance and comply with the requirements of the ErP Directive 2005/32/EC. The system achieves up to 68% heat recovery efficiency, based on equal supply and extract air volumes, with a supply air inlet temperature of +5°C and an extract air temperature of +25°C.
Robust construction, optimised coil geometry, and efficient heat transfer characteristics ensure reliable operation, reduced heating demand, and improved overall building energy efficiency across a wide range of commercial and industrial HVAC applications.
Optimised Performance
Each pair is individually selected using advanced computer software to ensure:
- Maximum heat recovery efficiency
- Balanced supply and extract duties
- Minimal air and water-side pressure drop
- Precise alignment with your airflow and system layout
High-Quality Construction
Every coil is built using premium materials and precision engineering:
- Seamless drawn copper tubes (EN12735-2 standard)
- Aluminium fins with die-formed, self-spacing collars
- Mechanically expanded tube-to-fin bonding for maximum heat transfer
- Silver-brazed copper return bends and tubular headers
- BSP(M) flow and return connections
- Integrated air vents and drain sockets
- Heavy-gauge galvanised steel casing for strength and durability
- Tube end plates designed with collared holes to accommodate thermal expansion and prevent damage
Rigorous Testing
All coils undergo rigorous pressure testing to ensure safety and durability:
- Pressure tested to a minimum of 17 barG
- Tested using dry compressed air under water
- Optimised performance verified before despatch
AHU Heat Recovery
What is a Run Around Coil?
A run around coil is a heat recovery system that transfers energy between the extract and supply air streams of an AHU without allowing the two air streams to mix. Two matched heat exchanger coils are connected by a pumped water or water/glycol circuit. The circulating fluid carries recovered heat or cooling between the coils, reducing the heating and cooling demand on the wider HVAC system.
System Operation
How Does a Run Around Coil Work?
The extract coil captures recoverable energy and transfers it into the circulating fluid. A pump moves the water/glycol around the closed loop to the supply coil, where that energy is transferred to the incoming supply air.
The closed fluid circuit transfers energy while keeping the extract and supply air streams completely separate.
Need a Run-Around Coil designed for your system?
Key Advantages
- Matched pairs — supply and extract coils designed together for optimal heat recovery.
- Dual function — heat recovery in winter, free cooling in summer.
- Custom-engineered — built to your airflow, duty and spatial constraints.
Optional Features
Fin Material — available in plain copper, tinned copper, or polyester coated aluminium for corrosive environments.
Tube & Fin — 1/2" O.D. tube with fin spacing from 4.2 mm to 2.1 mm. 5/8" O.D. tube with fin spacing from 6.0 mm to 2.1 mm.
Sloping Removable Drains — for easy cleaning.
Moisture Eliminators — to reduce condensate carryover.
Typical Applications
HVAC Heat Recovery
AHUs
Duct Mounted
Healthcare
Energy Efficient Projects
Green Building Projects
Downloads
Product Catalogue
Full specifications, dimensions and performance data.
Operation & Maintenance Manuals
Installation, commissioning and maintenance instructions.
Standards & Accreditations
All our products meet exceptional standards, achieved by testing and inspecting our coils and products regularly and adhering to strict procedures.
What Our Clients Say
At Sovereign Air Movement Ltd we have used H&C Coils for over 25 years now. Very efficient in turning projects round. Quality Coils, competitive prices along with very good lead times.
Kevin
Sovereign Air Movement Ltd
When a cooler failed on site, HC Coils delivered a new custom replacement. They understood our requirements and got us back on track without delay.
James T
Facilities Manager — Data Centre
Common Questions — Run Around Coils
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