Specialist service
Calorex Variheat
Installation, maintenance and responsive technical support across London and Greater London.
About Calorex Variheat
Controlling humidity in indoor swimming pools is essential to prevent condensation damage, mould growth, and structural corrosion while creating a comfortable, safe space for swimmers.
The Calorex Variheat range of ducted air handling units offers a premium solution tailored for domestic, light commercial, and medium-sized indoor pools across Greater London. Featuring advanced heat pump dehumidification technology, the Variheat series—available in models like Variheat 600, 900, 1200, and 1500—operates across a wide relative humidity (RH) spectrum from 35% to 100% and air temperatures between 3°C and 35°C, ensuring reliable performance in varying conditions.
With over 6 configurable options, these units provide ultimate flexibility for compact plant rooms, incorporating dynamic heat recovery to redirect energy from extracted moisture back into heating the pool water and ambient air. As a result, the Variheat maximises energy efficiency, minimises running costs, and maintains optimal air quality, making it the go-to choice for indoor swimming pool dehumidification in the UK.
As authorised Dantherm/Calorex agents, we deliver end-to-end services for Calorex Variheat air handling units, including bespoke installations that integrate seamlessly with your facility's layout, routine maintenance to sustain peak performance, and rapid repair services to minimise disruptions. Our experienced technicians handle everything from custom ducting and filter servicing to advanced diagnostics, ensuring your dehumidifier complies with UK standards and operates flawlessly year-round.
Serving clients in London and the Home Counties with quick response times and local knowledge, we help extend equipment lifespan and optimise efficiency. For expert advice on Calorex Variheat solutions, get in touch today — let's transform your indoor pool environment with reliable humidity control.
Technical insight
Efficiency and performance
The Calorex Variheat range sets the standard for energy-efficient dehumidification in indoor swimming pools, leveraging sophisticated heat pump technology and dynamic heat recovery to achieve superior performance with minimal energy input. By capturing and reusing latent and sensible heat from humid exhaust air, the system reduces the demand for supplemental heating, delivering substantial savings on operational costs—often up to 50% or more compared to traditional ventilation methods.
Models in the Variheat series, such as the Mark 3, incorporate low-energy components like electronically commutated (EC) fans and optimised compressors, enabling precise control over airflow and dehumidification rates for enhanced thermodynamic efficiency. This design not only lowers electricity consumption but also qualifies eligible configurations for UK incentives like the Enhanced Capital Allowance (ECA), supporting sustainable pool management in the UK.
Quantifiable efficiency metrics underscore the Variheat's advantages: the Coefficient of Performance (COP) typically reaches 3.0 or higher, meaning the unit generates three times more usable heat than the electrical energy it consumes, far exceeding standard dehumidifiers. Heat recovery rates can approach 90-95%, with power inputs varying by model—for instance, around 2-5 kW for smaller units like Variheat 600—while delivering dehumidification capacities from 60 to 150 litres per day.
Additional features, such as night setback modes for reduced energy use during off-hours and integration with low-pressure hot water (LPHW) systems or renewables, further boost savings by 30-70% in CO2 emissions versus conventional setups.
As Dantherm/Calorex approved agents, we ensure your Variheat installation maximises these benefits through professional setup, ongoing maintenance, and repairs, helping you achieve cost-effective, eco-friendly humidity control for your swimming pool. Contact us for a personalised efficiency assessment.
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