Industry
Application Guides
From circulating hot water around a heating system to moving chilled water through a cooling circuit, condensate removal, and pressurising the whole system so every floor gets the flow it needs, pumps are the part of an HVAC system that quietly keeps everything else working. Get the pump right and the system runs efficiently and reliably for years; get it wrong and you’re left with cold radiators, noisy pipework, and rising energy bills. This guide covers the types of heating, cooling, and HVAC pumps we offer to help you find the right solution for your system. For further information or specific questions, please contact us on +44 1332 913500.
When selecting a heating, cooling, or HVAC pump, these six factors help to determine the right choice:
The first question is always what the pump is actually doing. Circulating water around a closed heating or chilled water loop is a very different job to boosting mains pressure, removing condensate, or feeding a cooling tower. Closed-loop circulation suits glandless circulators and inline pumps; pressure boosting calls for multistage pumps or packaged booster sets; condensate and drainage need compact diaphragm or submersible pumps. Be clear on the duty before anything else.
Every HVAC system has a design flow rate and a head requirement, and the pump needs to match both. Flow rate determines how much heat the system can move; head accounts for the resistance the pump has to overcome through pipework, valves, heat exchangers, and fittings. An undersized pump leaves parts of the building cold or warm; an oversized one wastes energy, increases noise, and can cause problems like valve erosion. The aim is to hit the duty point, not to over-specify.
HVAC pumps often run continuously for months at a time, so efficiency has a direct and significant impact on running costs. Modern high-efficiency circulators and variable speed pumps adjust their output to match real-time demand rather than running flat out, which can dramatically cut energy use over a heating or cooling season. For any continuous-duty application, an efficient pump pays for itself many times over the life of the system.
HVAC pumps have to cope with the temperature of the fluid they’re handling, which can range from chilled water close to freezing through to hot water in heating circuits. The pump materials, seals, and any electronics need to be rated for the operating temperature of your system. This matters most in heating and solar thermal applications, where high fluid temperatures can quickly damage a pump that wasn’t specified for the job.
The water in a well-maintained closed-loop system is clean and treated, which is gentle on pumps. Open systems, poorly treated systems, and those that have suffered corrosion can carry debris, sludge, and particulate that wears pumps prematurely. Where water quality is a concern, choose pumps with appropriate materials and make sure the system is properly flushed, dosed, and filtered to protect your investment.
HVAC pumps are often installed in plant rooms, airing cupboards, and ceiling voids close to occupied spaces, so noise and vibration matter. Glandless circulators are near-silent and ideal for residential and noise-sensitive settings; larger end-suction and multistage pumps may need vibration isolation and careful siting. Consider where the pump is going and who’s nearby before you specify.
We’ve broken our recommendations down by application. Jump to the one that fits your needs:
Perfect For Heating Circuits, Underfloor Heating, Chilled Water Loops & Solar Thermal Systems
The circulator is the heart of most heating and cooling systems, quietly moving water around a closed loop hour after hour. Because they run for such long periods, this is the application where energy efficiency makes the biggest difference. Modern glandless circulators are near-silent, highly efficient, and increasingly come with variable speed control that adjusts output to match demand, which is exactly what you want in a continuously running circuit.
Circulators are glandless, inline pumps designed specifically for circulating water around closed heating and cooling loops with minimal energy use and almost no noise. They’re the default choice for residential and light commercial heating, underfloor heating, and chilled water circulation.
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Lowara Ecocirc Series High-efficiency electronic circulator for heating and chilled water circulation in residential and commercial systems. Its permanent magnet motor and variable speed control match output to demand, keeping energy use and running costs low across a long heating or cooling season. |
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Flojet D5-38/700B Compact wet rotor circulator with variable speed control, suited to solar thermal circulation and closed-loop heating and cooling duties. Its brass construction and 95°C temperature rating make it a dependable choice for domestic and small commercial solar hot water systems. |
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Ebara Ego Series Energy-efficient electronic circulator for heating and air conditioning circulation. The Ego adjusts its performance automatically to suit the system, offering quiet, economical operation in residential and commercial heating and cooling circuits. |
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Ebara LP Series Inline circulator pump for heating, air conditioning, and water circulation in larger residential and commercial systems. A robust, dependable option where a straightforward, well-built inline circulator is needed for continuous circulation duty. |
Key benefits: Near-silent operation ideal for occupied spaces • Variable speed control matches output to demand • Very low energy consumption over long running periods • Compact, glandless inline design • Simple installation directly into pipework • Models available for heating, cooling, and solar thermal duties
Perfect For Commercial Heating, Larger Circulation Duties, Plant Rooms & Air Conditioning Systems
Once a system gets beyond the scale a circulator can handle, end-suction and inline centrifugal pumps take over. These are the workhorses of commercial and industrial HVAC, moving larger volumes of hot or chilled water around bigger buildings and plant rooms. They offer higher flow rates and the robustness needed for demanding continuous-duty commercial applications.
Centrifugal Pumps cover the broad middle ground of HVAC, from compact close-coupled units for smaller commercial systems through to larger end-suction and inline pumps for plant room duty. Material and configuration options let you match the pump to the specific heating or cooling application.
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Lowara CIE Series Vertical inline centrifugal pump with integrated variable speed drive, well suited to heating, air conditioning, and pressure boosting in commercial buildings. The integrated drive matches output to demand, making it an efficient choice for variable-load HVAC systems. |
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Ebara 3D, 3L, 3M, 3P, and 3S Series A comprehensive range of stainless steel centrifugal pumps covering a wide spread of flow and head requirements for HVAC, heating, air conditioning, and general water circulation. There’s a configuration in this range to suit almost any commercial heating or cooling duty. |
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Lowara LN and NSCS Series End-suction centrifugal pumps built for larger HVAC and building services duties. The LN is a long-coupled back pull-out design for ease of maintenance; the NSCS is a close-coupled standardised pump, both well suited to heating and chilled water circulation in larger commercial and industrial systems. |
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Lowara E-SH and E-NSC Series High-efficiency end-suction centrifugal pumps for heating, chilled water, and building services circulation. Both come with premium-efficiency motors as standard; the E-SH is a stainless steel 316 pump well suited to demanding water conditions, while the E-NSC is a back pull-out cast iron pump built to EN 733 for straightforward maintenance. |
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Calpeda N Series Robust cast iron end-suction centrifugal pump for heating, cooling, and general water circulation in commercial and industrial systems. A dependable, well-proven choice for plant room circulation duties across a broad range of flows and heads. |
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Ebara 2CDX and CD Series Compact twin-impeller centrifugal pumps offering higher head in a small footprint, ideal for smaller commercial heating, cooling, and pressure boosting duties. A neat, efficient solution where space in the plant room is at a premium. |
Key benefits: Higher flow rates for larger buildings and systems • Inline and end-suction options to suit any layout • Variable speed models for efficient part-load running • Stainless steel and cast iron options for different water conditions • Back pull-out designs for straightforward maintenance • Proven, robust construction for continuous commercial duty
Perfect For Multi-Storey Buildings, Pressure Maintenance, Mains Boosting & Plant Room Supply
Tall buildings and large systems need consistent pressure delivered to every floor and every terminal unit, and that’s where multistage pumps and packaged booster sets come in. Multistage pumps build pressure progressively through multiple impeller stages, making them ideal for high-head pressurisation. Packaged booster sets combine pumps, controls, and pressure vessels into a ready-to-run system that maintains constant pressure regardless of how demand fluctuates through the day.
Multistage Pumps generate the high pressures needed to supply tall buildings and large HVAC systems, maintaining consistent flow against significant head. They’re a mainstay of building services pressurisation and plant room supply.
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Lowara E-SV Series Vertical stainless steel multistage pump widely used for HVAC pressurisation, pressure boosting, and water supply in commercial buildings. Efficient, compact, and quiet, it’s a go-to choice for building services pressurisation across a wide range of duties. |
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Ebara EVM and Matrix Series High-efficiency multistage pumps for HVAC pressurisation, heating and air conditioning, and water treatment duties. The EVM is a reliable vertical multistage workhorse; the Matrix offers integrated variable speed control for efficient operation under varying demand. |
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Lowara SVI Series Vertical multistage immersible pump for higher-head HVAC pressurisation and building services duties. A robust option for the higher-flow and higher-head applications found in larger commercial and industrial plant rooms. |
Packaged Booster Sets bring pumps, pressure vessels, and intelligent controls together into a single ready-to-run package that maintains constant pressure automatically, ramping up and down as demand changes through the building.
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Calpeda MXV and MXH Series Packaged booster sets built around Calpeda’s reliable multistage pumps, providing automated constant-pressure supply for HVAC systems, pressure maintenance, and building water supply. Configurable as single or multi-pump sets to suit the building’s demand profile. |
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Calpeda MXP Series Compact packaged booster solution for smaller HVAC and building services pressurisation duties. A neat, self-contained option where constant pressure is needed but plant room space is limited. |
Recommended for: Multi-storey and high-rise building pressurisation, pressure maintenance across large systems, mains pressure boosting, plant room and riser supply, variable-demand commercial buildings, and constant-pressure HVAC water supply.
Perfect For Air Conditioning, Chiller Circuits, Cooling Towers & Process Cooling
Cooling systems put their own demands on a pump. Chilled water circuits run at low temperatures and need pumps and seals rated to suit; condenser and cooling tower circuits often handle water that’s harder on equipment, sometimes with some particulate or treatment chemicals present. These pumps keep the cool side of an HVAC system moving reliably, from precise air conditioning circulation through to heavy-duty cooling tower duty.
Cooling Circuit Pumps are centrifugal and magnetic drive pumps selected specifically for the demands of chilled water, condenser, and cooling tower circuits, where low temperatures, water treatment chemicals, or continuous duty call for the right materials and design.
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Ebara DWC and MD Series Centrifugal pumps suited to chilled water and condenser circuit circulation in air conditioning and process cooling systems. Built for continuous-duty cooling applications where reliable, efficient circulation is essential to keep the system performing. |
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Jabsco Cyclone High-flow centrifugal pump for cooling water circulation and condenser duties. The Cyclone’s robust design suits continuous cooling circuit operation, including circuits where the water carries some particulate or treatment additives. |
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Flojet DC and GP Series Seal-less magnetic drive pumps for chilled water recirculation and closed-loop cooling duties. With no shaft seal to wear or leak, they’re well suited to compact cooling circuits, equipment cooling, and applications where reliability and leak-free operation matter. |
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Pentax Ultra Stainless steel centrifugal pump for cooling water circulation, air conditioning, and general HVAC duties. A cost-effective, corrosion-resistant option for chilled and cooling water circuits in commercial systems. |
Key benefits: Suited to low-temperature chilled water duty • Seal-less magnetic drive options for leak-free cooling circuits • Corrosion-resistant materials for treated and condenser water • Continuous-duty construction for year-round cooling • High-flow options for cooling tower and condenser circuits • Reliable circulation for air conditioning and process cooling
Perfect For Condensate Removal, Air Conditioning Drainage, Boiler Feed & Small Transfer Duties
Not every HVAC pump is moving heating or chilled water around the building. Air conditioning units and condensing boilers produce condensate that has to be removed, often pumped up to a drain where gravity won’t do the job. These smaller ancillary duties call for compact, reliable pumps that quietly get on with the task in the background, and they’re easy to overlook until they stop working.
Condensate & Ancillary Pumps are compact diaphragm and peripheral pumps that handle condensate removal, drainage, boiler feed, and the various small transfer and circulation duties found throughout HVAC systems.
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Flojet Triplex and Versijet Series Compact air and electrically operated diaphragm pumps for condensate removal, drainage, and small fluid transfer duties around HVAC systems. Reliable, self-priming, and easy to install where a small, dependable pump is needed for ancillary tasks. |
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Lowara P Series Compact peripheral pump delivering higher pressure at lower flows, useful for boiler feed, small circulation duties, and pressure boosting of small HVAC and hot water circuits. A simple, economical choice for low-flow, higher-head ancillary applications. |
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Calpeda T Series Compact peripheral pump for boiler feed, small circulation, and pressure boosting in domestic and light commercial hot water and HVAC systems. A reliable, economical option where a low-flow, higher-head pump is needed. |
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Pedrollo PQA and PV Range Compact peripheral pumps for small circulation, boiler feed, and pressure boosting duties in domestic and light commercial HVAC and hot water systems. Quiet, reliable, and easy to install for low-flow ancillary tasks. |
Key benefits: Compact and easy to install in tight spaces • Self-priming designs for condensate and drainage duties • Reliable background operation for ancillary tasks • Higher-pressure peripheral options for boiler feed • Economical solutions for small transfer and circulation duties
Beyond the pump itself, a few key components make all the difference to how well an HVAC system runs and how long the pump lasts:
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