Hydrun UK Importer/distributor.
The future of pressurisation, degassing and filtration
for water fed heating and cooling systems.

Smart buildings need smart pressurisation and smart degassing: SmartPressure are the UK Importer/distributor of Hydrun, (formerly HL Hydronics) Sweden. Hydrun manufactures a range of innovative and highly efficient pressurisation, degassing and filtration products for HVAC Energy Networks including District Heating and District Cooling.

The next generation of hydronic efficiency

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Manchester Met University

Combined pressurisation and degassing

Manchester Metropolitan University Hydrun case study

Being able to offer all key features in the smallest practicable space met the client’s objectives perfectly, as Space saving and reduced weight were required. Access to and within the plant room was limited.

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Media City Manchester

HY-P Dynamic Pressurisation  

Hydrun case study Media city

SmartPressure came to the rescue by being able to replace a competitor’s failed spill & fill pressurisation unit (major control system fault) with our own SmartPressure H-Line unit within a very short time frame and at a substantially lower cost.

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Broadgate Leeds

Vacuum Degassing

Hydrun case study Broadgate Leeds

Typical energy cost savings of 5-10% are achieved by fitting active vacuum degassing. This applies to all heating and cooling wet systems by improving thermal transfer performance through the removal of dissolved gases.

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Why working with SmartPressure makes sense

Innovative technology

Smart, innovative and reliable technology, that delivers real results.
Hydrun technology saves capital and revenue expenditure by simplifying plant requirements, minimising plant room space, reducing maintenance costs, negating the need for and cost of expensive annual insurance inspections.
Extends the life of all hydronic systems and networks by eliminating scale formation and corrosion.

System architects

SmartPressure, have extensive experience in the residential, commercial and industrial sectors supplying and designing effective systems for energy efficiency, reliability and productivity in thermal energy systems. We specialise in

Dynamic pressurisation
Active Vacuum Degassing
Arrestance and Magnetite Filtration


Technical support

We are here to help and support you at every step of your installation, specification, tender and maintainance. We have over 30 years experience in delivering, successful installations and systems with extended lifecycle. Maximised reliability and longevity.

Service and support is fundamental to SmartPressure's ethos.

We ensure optimised operation and a maximised system lifetime.

Environmentally friendly.Less Energy use
Less chemicals
Less waste

Making your heating and cooling HVAC (VVS) technologies run efficiently not only saves you space and money, it also means using less energy, through efficiency, less chemicals through via vacuum degassing




Dynamic pressurisation. Reduces electricity consumption , noise and wide pressure fluctuations.

The Hydrun HY-D and HY-PD diaphragm-free pressurisation units, reduces electricity consumption , noise and wide pressure fluctuations by offering close-tolerance control to precise pressure point accuracy and extended system lifespan. Negating the need for traditional expansion vessels also significantly reduces plant room size and access issues whilst eradicating troublesome and costly diaphragm vessel maintenance.

Hydrun HYP dynamic pressurisation unit Find out more

Active Vacuum Degassing.Air, micro-bubble and gas removal eliminates scale and corrosion and improves thermal conductivity.

The Hydrun HY-D delivers permanent and mobile air, micro-bubble and gas removal units, not only eliminates scale formation and water borne corrosion (in compliance with VDI2035-2021), but by doing so significantly improves system thermal energy efficiency by improving thermal conductivity between the fluid and metal surfaces which in turn allows system temperatures to be reduced.

Hydrun HY-D active degasser Find out more

Magnetite Filtration. To protect your plant from debris damage, improve energy efficiency, and extend the lifespan of your entire system.

Magnetite Filtration has become crucial in recent years as system water content reduces to help achieve greater energy efficiency. The Hydrun HY-F and is the perfect compliment to our dynamic pressurisation and active vacuum degassing product lines as well as being available to fit independently into existing systems in need of enhancement.

Hydrun HY-F side stream filtration with a pump Find out more

Dynamic pressurisation delivers significant energy and operational cost savings, combined with increased reliability and machinery longevity.

SmartPressure about the company An importer and distributor like no other, we don't just sell products, we are here to help and support you at every step of your installation design, specification, tender and maintenance. We help you get the system architecture right to make sure your installation will work effectively and efficiently, for many decades.

Find out how Vacuum Degassing works

Find out how we can help you, email or call on