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HVAC Coils – Repair and Exact Replacement
At Heatxforce, we manufacture, supply and install all types of fin coil air conditioning units, including refurbishment and replacement, re-designs and upgrades, cleaning and on-site assembly.
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What are HVAC coils used for?
The majority of coils are made from a series of copper tubes with aluminium or copper fins to increase the heat transfer surface areas. Either a heating or cooling fluid is circulated through the tubes whilst a cold or hot air stream passes over the tubes and fins.
HVAC Coils Explained
What are HVAC coils used for?
The majority of coils are made from a series of copper tubes with aluminium or copper fins to increase the heat transfer surface areas. Either a heating or cooling fluid is circulated through the tubes whilst a cold or hot air stream passes over the tubes and fins.
How do coils work?
Heating, Ventilation and Air Conditioning Coils (HVAC) are used either in ducted systems or Air Handling Units (AHU). Their function is to either heat or cool an air stream using steam or hot water in the case of heating and chilled water or refrigerant when cooling.
Coil Types
Finned Heating Coils
Finned Heating Coils can be used with steam, LPHW & MPHW and can be manufactured from a range of materials. The most common combination is copper tubes with aluminium fins, but for more arduous environments, copper fins can be used. There are a number of surface finishes which can be used to protect the fins and copper fins can be supplied with an electro-finned finish for harsh environments.
Finned Cooling Coils
Finned Cooling Coils are used with chilled water for cooling air in air conditioning systems. Using a water/glycol mix, they are most commonly used in larger buildings, which have plant room chillers. The material selection is the same as for finned heating coils. Chilled water coils are normally fitted with a drip tray to collect water droplets which condense, as the air passes over the fins.
Unfinned Plain Tube Coils
Unfinned Plain Tube Coils are sometimes used in air handling units as "frost coils" to pre-heat incoming sub-zero temperature air. This is to prevent freezing of water circulating through finned coils elsewhere in the AHU.
Evaporator Coils known as DX Coils
Evaporator Coils use refrigerant to cool air stream. These are usually duct mounted or small packaged units and do the same job as chilled water coils.
Prevent Frost Damage to your Heat Exchanger Coils
Monitoring heating and cooling systems
Frost damage can occur anywhere below 0°C and can cause substantial damage to your Heat Exchanger Coils. When temperatures start to drop, it is important to monitor heating and cooling systems properly. This can be as simple as topping up your Glycol levels or ensuring that coils are properly drained when not in use. If Glycol levels and/or frost protection systems are not maintained there is a danger that the tubes or bends within the coils could freeze and split. A damaged tube will result in further loss of fluid which will cause more significant damage to the system, resulting in a loss of cooling or heating, and therefore a higher price to fix.
Suffering from Frost Damage? Heatxforce can help!
If you are unfortunate enough to suffer frost damage to your Heating Ventilation and Air Conditioning (HVAC) Plant, Heatxforce will be able to carry out the majority of repairs. This will keep your system operational, whilst a replacement coil is manufactured. In most cases of frost damage, the affected coil will need to be replaced, but don't worry our specialist team can help. All we need is the material specification and dimensions for your coil and we can manufacture a replacement.
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Heatxforce build pressure equipment in accordance with PD5500 and ASME VIII Pressure vessel codes whilst conforming to the European Pressure Equipment Directive (PED) and UKCA Pressure Equipment Safety Regulations (PESR), which are mandatory inspection requirements applicable to pressure vessels and systems.
Our welding procedures are in accordance with ISO 15614-1 and ASME IX.
Welder qualifications are in accordance with ISO 9606-1 and ASME IX.
All of our welding related qualifications are certified by TUV Nord.
