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HVAC - Barcelona specialises in high-tech maintenance of engineering systems, offering professional cleaning and chemical stabilisation of heating circuits without the need to dismantle the equipment.

1. Issues relating to the degradation of closed hydraulic systems
During the operation of heating and domestic hot water (DHW) systems, factors inevitably arise that reduce their efficiency. The main destructive processes are:
Corrosion: Oxidation of the system’s metal components (steel, copper, aluminium) leads to the formation of sludge and magnetite.
Calcification (scale): Deposition of hardness salts on the heat exchange surfaces of boilers and the inner walls of pipes.
Biological fouling: In low-temperature systems (such as underfloor heating or aerothermal systems), a favourable environment is created for the growth of bacterial colonies and algae, which form a biofilm.
A deposit layer just 1 mm thick can reduce heat transfer by 10–15%, forcing boiler equipment to operate at maximum capacity, increasing fuel consumption and accelerating wear on circulation pumps.
 

2. HVAC Technical Protocol – Barcelona
The company’s methodology is based on the use of specialised professional equipment and certified chemical agents. The main advantage is the non-disassembly (in-situ) method, which allows the system to be cleaned without damaging the building’s finishes or structural integrity.
Services provided:
Underfloor heating systems: Removal of sludge deposits and biofilms, restoring the pipes to their original flow capacity.
Radiator networks: Cleaning of magnetite and sludge, eliminating ‘cold spots’ in radiators.
Heat generators (boilers): Descaling of primary and secondary heat exchangers.
Aerothermal systems (heat pumps): Gentle flushing of evaporator and condenser circuits to maintain a high COP (Coefficient of Performance).
DHW systems: Removal of limescale deposits to ensure a stable flow and hygienic water purity.
 

3. Chemical stabilisation and creation of a ‘favourable environment’
Cleaning is only the first stage. The HVAC - Barcelona technical regulations require subsequent conditioning of the heat transfer fluid. Specialised corrosion inhibitors and biocides are introduced into the system to address the following issues:
Surface passivation: Creation of a microscopic protective film on the inner walls of pipes and heat exchangers to prevent re-oxidation.
pH stabilisation: Maintaining an optimal pH level to protect multi-metal systems.
Prevention of gas formation: Reducing the risk of air ingress into the system.
Thus, HVAC - Barcelona does not merely remove dirt, but transforms the heat transfer fluid into a technical medium that actively protects the equipment from within.
 

4. Cost-effectiveness and longevity
Regular servicing is an investment, not an expense. A clean system ensures:
Reduced energy costs: Restoring the system’s design thermal conductivity can save up to 20–30% on gas or electricity.
Extended equipment life: The absence of sludge reduces the load on heat exchangers and prevents cavitation wear on pumps.
Hydraulic balance: Even heat distribution throughout all rooms without the need to increase the supply temperature.

 

Maintenance schedule
In accordance with engineering standards and equipment manufacturers’ recommendations, comprehensive flushing and renewal of the heat transfer fluid’s chemical composition must be carried out every 2–3 years. This is a critical interval for preventing irreversible damage to expensive system components.