ISO Certified & Verified

Commercial Desiccant Dehumidifier

Q: What is the difference between a rotary and a liquid desiccant dehumidifier?

A rotary dehumidifier - a continuously-regenerating silica gel unit - circulates air through a continuously rotating, solid desiccant wheel (silica gel or molecular sieve) powered by regeneration heat. It's compact and built for colder climates and the lowest achievable dew points. A liquid desiccant system involves spraying a solution, like lithium chloride or salt, which absorbs water and can achieve the lowest RH levels, handle salty/corrosive air, and retain dehumidification capacity within the solution. Koven produces both designs: the rotary in its KSD series and the liquid in a separate product line.

Q: Is a desiccant dehumidifier better than a refrigerant dehumidifier?

This isn't a universal answer, and it really depends on temperature and target dew point. At or below approximately 40°F dew point, or for air below around 10°C, refrigerant systems will either fail to meet performance or experience frost, leaving desiccant as the only practical option. For a warm space and a more modest humidity target, a refrigerant unit is typically more cost-effective to operate. The two systems are complementary, not competitors.

Q: What are the disadvantages of a desiccant dehumidifier?

There are two drawbacks to this, both of which are manageable: heat for regeneration is consumed (which is the biggest cost component, but it can be reduced by heat recovery), and it will heat up the process air by around 13°C (13°C / ~23°F) as it passes through the rotor. While this can be a problem in a warm space, it's beneficial in a cool room or rink. Koven's combination units include cooling coils that deliver the supply air at a useful temperature.

Q: What dew point can a commercial desiccant dehumidifier reach?

Desiccant systems produce dew points as low as 40 C, far lower than a refrigerant unit’s +4 to +7 C minimum. Commercial standard KSD combined units can handle 15-45% outlet RH, while sub-zero dry rooms are made with custom or liquid-desiccant equipment.

Q: What is the lowest temperature a dehumidifier will work at?

Refrigerant units lose capacity at around 10 C, risk coil frost near freezing. Desiccants work in sub-zero conditions, since they don’t require chilling a surface to the dew point for water condensation, which is why cold storage and ice rinks rely on them.

Q: How do I size one for my facility?

Size by dew point (not RH), and include the infiltration load-especially from doors and dock areas, which often dominate. Use our online tool for initial design, then verify with your load calculations.

Commercial Desiccant Dehumidifiers, Rotary Wheel & Liquid Desiccant Systems

A commercial desiccant dehumidifier works by using a rotating desiccant wheel – or a liquid desiccant contactor – to draw moisture from process air, rather than cooling it below its dew point. That allows a desiccant unit to achieve very low humidity at low temperatures, where refrigerant units ice up and shut down. It can even pull air down to dew points a compressor can’t physically reach. Koven Air offers both rotary-wheel (KSD-D/Q) and liquid-desiccant systems for 1,500-30,000m³/h air flows – the complete commercial and industrial desiccant dehumidifier line for ice rinks, cold storage facilities, dry rooms, and all types of industrial process air humidity control.

Koven Desiccant Line, At a Glance

1,500–30,000 process airflow, m³/h (KSD-10 → KSD-200)

2 desiccant technologies: rotary wheel + liquid

27→18–25 °C inlet 60% RH → outlet 15–45% RH

−40 °C dp reachable regime for desiccant vs refrigerant floor

B / Z · D / Q chilled-water or DX · electric or steam regen

Lifetime free after-sales technical service

When refrigerant falls short KSD models Rotary vs liquid vs refrigerant Ice rink & pool Cold storage & dry rooms Sizing Certifications & quality Procurement FAQ

Request a Sizing & Quote →

2007 founded · exporting since 2010
35 countries served

20,000 m² manufacturing floor
In-house chiller / heat-pump test lab

400-point process traceability

36 factory inspections
24 h aging test

When Refrigerant Dehumidifiers Fall Short, Low Temperature and Low Dew Point

There isn’t one “best” type of dehumidifier, the selection really depend on the dew point and temperature you need to hold. Refrigerant- (compressor) dehumidifiers use cold surfaces to condense and remove moisture. They cool air below its dew point and drain the resulting water. But a compressor can’t go too cold – once the refrigerant coils dip below about 4-7°C (39-45°F) they begin to freeze over, which reduces performance and capacity dramatically, particularly if the incoming air is also cold (below 10°C or 50°F). Trying to use a compressor to reach a very low dew point in a cold environment means ice, short-cycling, or failure to achieve the required dry conditions.

Desiccant dehumidifiers operate on a completely different principle: no cold surface is involved. They expose air to a highly hygroscopic material, like silica gel or a lithium chloride solution, which adsorbs the moisture. Heat then regenerates the material by driving the absorbed water vapor off. Because no freezing can occur, a desiccant system can operate reliably at air temperatures below zero and achieve much lower dew points (down to -40°C) than a compressor could ever approach. This is precisely why ice rinks, cold storage, pharmaceutical dry rooms, and lines manufacturing lithium-based batteries specify desiccant equipment, instead of adding more refrigeration.

Front-line reality (contradiction worth knowing): a facility can meet a 40% RH set-point on paper and still get condensation and corrosion. A U.S. military ammunition-storage study found stock corroding even while the space held its RH spec — because the real target is preventing surface condensation and dew-point excursions, not hitting an RH number. Desiccant control manages the dew point, which is what actually protects the product.

In simple terms: keep refrigerant for when air is warm and low-dew point performance is “good enough.” Move to desiccant for when the air is cold, the dew-point target is extremely low, or a condensation risk, rather than simply comfort, dictates performance requirements. This page explains the latter and details Koven’s commercial and industrial rotary and liquid desiccant dehumidifier line-up. For ASHRAE recommendations regarding the boundaries between these two types, see the ASHRAE Handbook (Refrigeration, Ch. 44 and Fundamentals).

That’s why Koven Air designs and manufactures an entire line of industrial desiccant dehumidifiers for humidity control – we don’t just resell underperforming refrigerant units on the edge of their capability. Every desiccant dehumidifier we produce is built on the same 400-point-traceability line and runs a 24-hour aging test before shipment, and each unit is selection-matched with our software to the dew-point target stated in your proposal — so the specification you approve is the specification the unit is built and quoted to, something a stock refrigerant unit on the edge of its range cannot promise.

KSD-SERIES

Koven KSD-D/Q Rotary Desiccant Dehumidifiers, Models & Selection

Koven’s rotary series is the KSD-D/Q-B/Z Combined Desiccant Dehumidifier – a package air-handling unit around a standard desiccant rotor, a medium-efficiency inlet filter, a front and rear set of cooling coils, and the process and supply fans – packaged into a single, self-contained box. The product is available in 8 standard sizes across 1,500 to 30,000 m³/h of process airflow (approx. 880 to 17,600 CFM), and each size is re-configurable into a non-standard unit custom-built to the required target for dry air temperature, humidity and cleanliness. Undersize by as little as one size model and you’ll be leaving 20-30% of the dehumidification headroom you’d need on your peak load day – a costly misstep – so the KSD range is purposely granular – a true heavy-duty commercial dehumidifier platform, rather than a standard unit forced to perform at the limits.

The model code provide at a glance configuration: D or Q denotes regeneration heat source (electric or steam, respectively – the former having lower operating costs when a steam supply is available on site). B or Z denotes cooling source (water or direct expansion, respectively – B require 12°C chilled water, Z has self-contained refrigeration). Pair the code letters to your existing site utilities, then size the 2 or 3 digit numerical identifier (10-200) to match your process airflows.

Koven KSD-D/Q Rotary Desiccant Dehumidifiers

SYS.READY // KSD-SERIES

KSD Capacity-to-Application Selection Matrix — Direct-Expansion (-Z) standard units

Model	Process airflow (m³/h)	≈ CFM	Cooling capacity (kW)	Filter area (m²)	Total power (kW)*	Outlet residual pressure (Pa)
KSD-10D/Q-Z	1,500	≈880	26.5	1.8	30 / 10.8	≥300
KSD-20D/Q-Z	3,000	≈1,765	40.5	2.9	44.9 / 16.2	≥300
KSD-30D/Q-Z	5,000	≈2,940	63.5	4.6	73.4 / 25.6	≥300
KSD-50D/Q-Z	8,000	≈4,700	99.5	7.8	120.4 / 43.9	≥300
KSD-80Q-Z	12,000	≈7,060	146.5	13	68.1	≥300
KSD-120Q-Z	20,000	≈11,770	244.3	22	105.3	≥300
KSD-150Q-Z	25,000	≈14,710	317.5	27.5	131.3	≥300
KSD-200Q-Z	30,000	≈17,650	405	32.5	163.5	≥300

*For those applications where there’s a water service, the -B chilled-water (surface-cooling) models can also be specified with 7°C supply in place of 12°C for equivalent airflow volumes. Dimensions, coil-layout and connection details for individual sizes can be found on the KSD series datasheet, downloadable from our website. Standard performance operating point for standard size models: 27°C, 60%RH @ inlet and auto-controlled between 18 and 25°C at 15-45%RH. Refrigerant type for DX models configured to suit destination market’s latest regulations – confirmed at time of order.

A word of explanation on dehumidifier datasheets: standard ratings show airflow, with input/output temperatures and relative humidity ranges. What the data *doesn’t* tell you directly is moisture removal capacity on an airflow basis – that’s simply the airflow multiplied by the moisture content drop across the rotor, or the moisture removal capacity / airflow for a given input and output air condition, that our selection software matches against your specific load. DOE/NREL researchers calculate this way, as this is how it must be validated, rather than just copying a nameplate number off the side of a box. Recent improvements in rotor technology, for example USPTO application US 2022/0381452 A1 (a directly-heated desiccant wheel) — aim to cut energy use through better regeneration efficiency, and Koven Air’s rotors sit in that same silica-gel and molecular-sieve family. That patent is third-party industry art, not a Koven filing.

“We size to the dew-point target and the site load, not to a nameplate RH. Before we quote a rotor size we confirm the dehumidification capacity and the temperature rise across the wheel against the actual moisture load, that is what keeps a unit from being 20% undersized on the worst day of the year.” Koven Air Application Engineering team

One caveat worth flagging up front: undersize a heavy duty commercial dehumidifier by even one model step and you can lose 20–30% of moisture-removal headroom on the design day — an expensive mistake, because a rotor chosen on airflow alone can fall short. That is the reason Koven Air confirms rotor capacity and temperature rise against the measured load with selection software before quoting, unlike suppliers who quote off a nameplate, and why every KSD unit ships only after 36 factory inspections and a 24-hour aging test.

Rotary Wheel vs Liquid Desiccant vs Refrigerant, How to Choose

There are three technologies competing for a dehumidification task and it’s an engineering choice with a cost tail rather than a brand choice. Refrigeration is the cheapest to operate in warm air and with a mild dew point. A rotary desiccant wheel commands the cold, low-dew-point air. A liquid desiccant system (lithium chloride or salt solution) gives you deep drying along with air washing, plus the ability to store some drying capacity in the solution. Koven has both types of that table: The KSD line of rotary-wheel dehumidifiers is shown here; Koven’s other product line of liquid desiccant dehumidifiers targets very deep, very low dew points.

Desiccant-vs-Refrigerant Crossover — what each technology actually delivers

Factor	Refrigerant (compressor)	Rotary desiccant wheel	Liquid desiccant
Practical dew-point floor	+4 to +7 °C (39–45 °F)	to ≈ −40 °C	to ≈ −40 °C, deep low-RH
Behaviour in cold air (<10 °C)	Capacity falls; coil frost risk	Unaffected	Unaffected
Effect on supply-air temperature	Cools & dries	Adds heat (≈+13 °C across rotor)	Near-isothermal; can cool
Energy character	Efficient in warm/mild duty	Regen heat (COP < 0.6)	Regen heat; heat-recovery friendly
Best fit	Warm spaces, mild RH, comfort	Ice rinks, cold rooms, process air	Dry rooms, deep low-RH, corrosive/coastal

Rotary Wheel vs Liquid Desiccant vs Refrigerant

The honest trade-off: desiccant is not free

There are two major costs of desiccant dehumidification that a thoughtful specifier anticipates. One is regeneration energy – driving the moisture back out of the wheel cost heat and the thermal COP of a desiccant stage is usually below 0.6. It’s often the largest single operating cost in a desiccant unit. Second is the adsorption heat released during drying, which warms up the process air about 13 °C. That’s a penalty to re-cool in warm space and welcome heat in a cold space. That’s why desiccant works in ice arenas but not a warm swimming pool hall, and why Koven Air engineers the combination units so that the process air coming out of reactivation is warm, but the air supplied to the space comes out of two coils, typically around 18 to 25 °C. That in-house matching make a unit truly a system, not just a coil bolted to a rotor.

There’s also some potential to recover regeneration heat, as in the ice-rink case study at the bottom of this article, which reduced the regeneration and overall energy significantly by using a condensation heat recovery process. If you compare technologies, compare them at the dew point you need to achieve. Below a certain temperature-typically around 40 F-refrigeration isn’t possible, and even if it were possible it would be very expensive, leaving desiccant as the only option.

Ice Rink & Indoor Pool Dehumidification

But for an ice rink, a desiccant dehumidifier stops being a possibility and start becoming the requirement. Ice surfaces require a supply air around 35-45 F dew point to ensure fog is eliminated from the ice and condensation is eliminated from steel structures; and at that range, we’re already at or just below the +4 to +7 C range attainable with a refrigeration unit. According to ice rink operators: “If the ambient relative humidity gets to 50 percent, you’ll get frost on the ice in 20 minutes,” and for a foggy ice sheet, “You can stop that fog problem by using a commercial dehumidifier.” While a standard refrigeration-only rooftop may produce only 52-54 F dew-point air, a Koven Air desiccant unit is sized on the sheet load to deliver the 35-45 F supply-air dew point a playable, fog-free sheet requires – a range a refrigeration-only unit cannot hold. Unlike a standard rooftop plopped on top of a rink, our rotor size is specified for the sheet surface, not the comfort set-point.

Attributed case study — rotary desiccant + heat recovery on an ice rink. A 2024 paper in the Chinese journal 《制冷与空调》 (Refrigeration & Air-Conditioning) analysing a Fuzhou ice-hockey rink reported that an optimized desiccant-wheel scheme with condensation-heat recovery cut supply-air moisture to about 5.8 g/kg, reduced circulating air volume to roughly 41.8% of the traditional design, and lowered carbon intensity by about 41% (≈38.6% less standard coal). We cite this as third-party published research on the technology’s performance envelope, not as a Koven project. It is a useful, independent benchmark for what a well-designed rotary-desiccant rink system can achieve.

Indoor pools are just the mirror image, and warrant an equally honest response: an indoor pool hall is a high-latent, warm load, and the industry standard is heat-recovery with refrigerant in specialized pool units, and KSD’s combined unit is the “fit” for pool and shoulder season halls that use both cooling coil and rotor for both temperature control and to combat glass condensation. Not a claim of outperformance against a purpose built pool heat-recovery machine, but it’s a pool dehumidification unit with merit when combined desiccants are employed for the low occupancy cool hall, or a glass intensive envelope susceptible to winter condensation, as contrasted against a high activity, hot competition pool.

Operators say it plainly: “Once ambient humidity hits 50%, it only takes 20 minutes for frost to start forming on the ice,” and in a fog-bound rink, “a commercial dehumidifier would solve the issue.” Unlike a comfort-cooling rooftop, a Koven Air rink unit is sized against the sheet load at a 35–45 °F dew point and run through the standard factory inspection and 24-hour aging test before shipment — and the same combined-rotor design doubles as a pool dehumidification system for cool natatoriums and glass-heavy halls prone to winter condensation.

Cold Storage, Dry Rooms & Low-Temperature Warehouses

The colder and drier the air you’re handling, the more effectively desiccant wins out – and the greater the shift away from standard rotating-dehumidifier units toward specially designed or liquid-dehumidifier units. Low temperature cold storage, freezers anterooms and warehouses face coil-and-product frosting every time any ambient humidity creeps below the freezing point – with pre-drying of both the air being used and the ambient infiltration air with a desiccant system stopping the problem at its origin through adsorption, whereas a refrigerative system would simply produce a more resistant ice layer. Koven Air’s custom non-standard KSD line of desiccant dehumidifiers are built to the required dry air temperature and humidity along the same 400 point traceability line as their standard units, inspected and aging-tested to the same factory QA standard, then shipped – in contrast to the catalog description of an ordinary dehumidifier.

The extreme end – lithium-battery dry rooms and pharmaceutical dry rooms – need dew points down to −30 °C to −60 °C, below 1% RH, something a refrigeration system could never achieve because the coils would freeze over solid long before the air ever got that dry. This is deep low-RH work; it’s a job for Koven Air’s liquid desiccant or lithium-battery dry-room lines, designed for sub-zero dew points, and not the combined-rotor standard unit rated at 15 – 45% outlet RH. If you need low RH in a cool room, that’s a job for the standard KSD line; if you need a sub-zero dew point, that’s a job for the deep-drying line. This is the honest split rather than a single datasheet trying to straddle the two requirements.

Warehouses and general storage fall in between. The most common need is to keep moisture below the mold and corrosion threshold, rather than to achieve a specific process-grade dew point. Here, sizing discipline becomes more important than sheer capacity, which is what we cover next. ASHRAE guidelines on moisture control — referenced in the U.S. DOE Building Energy Codes materials — suggest that a more useful goal than meeting a specific RH value is to “prevent condensation.”

How to Size a Commercial Desiccant Dehumidifier Engineer

A common and often expensive mistake in desiccant sizing is to size on relative humidity, not dew point. Thirty percent RH, for example, contains half as much moisture at 10 C (2.3 g/kg) as it does at 21 C (4.6 g/kg) – a difference of about 2 g/kg, the actual water you need to remove. Size your desiccant on dew point (or the target grains per pound or g per kg), not on RH.

A proper selection should be based on four values: (1) the space volume and air change rate or makeup air volume to get your process airflow rate; (2) the infiltration and internal moisture load (people, product, open doors, fresh air) to establish the load that needs to be removed; (3) the target dew point required for the protection of your product or surfaces; and (4) the design-day outside air condition. Koven Air’s engineers then verify rotor capacity and temperature rise with selection software before providing a quote. A rotor sized on RH will almost certainly come up 20% short on the worst day of the year. The most effective variable that can reduce infiltration is the one with the most impact on any load reduction efforts: disciplined use of door and envelope. Open dock doors and unsealed vestibules can magnify infiltration severalfold, so the cheapest form of “capacity” you can often find is an effective airlock rather than a larger machine.

To quickly make an initial selection, try Koven’s inline calculator. It will calculate evaporation using ASHRAE swimming pool and ice rink formulas and scale the results to a KSD model and airflow rate before you speak with one of our sales engineers. It serves as an excellent starting point but not a substitute for a load-verified selection.

The bottom line on sizing:

Koven Air’s engineers confirm every selection against the measured load with selection software, because a rotor chosen on relative humidity alone is the most common way a project ends up 20% short on the design day — the difference between a silica gel dehumidifier that holds the dew point and one that struggles in a 5,000 m³/h hall. A 30% RH space is 4.6 g/kg at 21 °C but only 2.3 g/kg at 10 °C, so specify by dew point, not RH.

Mfg-QA / 9000

Certifications & Manufacturing Quality

Buying an environmental-control unit from an overseas manufacturer come down to one question procurement actually asks: can this factory build it right and stand behind it? The real risk on a project clock is a unit that fail inspection or arrives mis-certified – an expensive delay. Koven Air answers that with process control you can audit, not adjectives, because 36 documented factory inspections beat a marketing sentence every time. Every unit runs through 18 standardized production processes and 23 sheet-metal precision machining stations with intelligent robotic modular assembly, 400 process traceability points, 36 factory inspections, and a 24-hour aging test before shipment – and chillers and heat pumps are proof-tested in an in-house testing lab rather than only on paper. That’s the manufacturing evidence behind a 35-country installed base since 2010.

On third-party certifications, and unlike suppliers who paste badges they cannot back, Koven Air states only what applies: desiccant dehumidification performance is characterized by test methods such as ANSI/ASHRAE 139 (method of test for rating desiccant dehumidifiers) and AHRI 940 for desiccant equipment; the refrigerant/pool contrast is covered by AHRI 910/920 and ASHRAE 174. Which product certifications and listings ship with a given unit depend on the destination market and the configuration, and are confirmed in writing at order – Koven does not claim a listing a unit does not carry. Buyers can and should verify any certified-performance claim through the AHRI Certification Directory and the standard scope on ashrae.org.

Factory Inspections

400

Traceability Points

Production Processes

Countries Installed

Procurement, Customization, Lead Time, US Support & Lifetime After-Sales

Delivered cost and support risk decide more desiccant tenders than sticker price, so it helps to see what actually drives a Koven quotation. Rather than a list price, price is set by a handful of configuration factors, and knowing them lets you value-engineer before you buy:

Airflow & capacity – the KSD size (10-200) that matches your process airflow and moisture load.

Cooling source – chilled-water (-B) if you already have a 12 C loop, or self-contained DX (-Z) if you don’t; DX raises unit cost but removes a plant dependency.

Regeneration source – steam (Q) trims running cost where steam exists; electric (D) simplifies installation.

Catalog size vs a non-standard build to a specified dry-air temperature, humidity and cleanliness.

Control accuracy, filter grade, and the refrigerant and listing set required for your destination market.

Working a bid or a budget number? Request a delivered-cost quote & lead time →

What desiccant actually costs to run, and where it pays back

According to independent research, desiccant regeneration requires approximately 2,400-2,600 kJ per kg of water, with this accounting for about 44% of total operating costs – the reason why the optimization of heat recovery is so essential. The referred Fuzhou rink case study illustrates the success of using an optimized approach, indicating nearly 41% reduced carbon emissions intensity and 28.6 kW less summer power consumption compared to a traditional setup. We focus on the various cost factors rather than simply giving a payback time frame, as your payback period depends on factors like utility costs, operational hours, and the scope of your heat recovery setup – simply request an application-specific TCO assessment, and we can conduct a tailored analysis based on your own figures.

Support & Lifetime After-Sales

For support – the “made overseas” real complaint – Koven Air offers a project pre-sale design and engineering with accurate parameter-level design, a post-manufacture tested shipment including on-site installation and debugging support, and a lifetime free technical support with all warranty period concerns handled without delay and periodical training for all engineering contractors and engineers maintaining the equipment. In the words of one of the year-round rink operators, “we realized in order to go year round we needed a desiccant system properly installed to maintain a proper quality of air and humidity,” and while a low-cost box with little engineering backing puts the burden of responsibility back onto the buyer once it has been shipped, that post-sales support is just as much a product as the product shipped out of the box. Shipment timeframes, the flow of replacement parts and destination-market compliances are confirmed in the project up-front, and we can avoid any unpleasant surprises when the shipped equipment is delivered.

As one year-round rink operator put it, “when we decided to go year round we had to have a proper desiccant unit installed to maintain proper humidity and air quality” — and unlike a discount box with no engineering behind it, that lifetime after-sales relationship is as much the product as the crate.

SYS_STATUS: Key operating costs are used; a specific $ payback is determined for each site rather than presented as a general figure.

Commercial Desiccant Dehumidifier Engineering Tools

How much dehumidification do you need?

Enter your facility’s conditions to estimate the moisture load and find a starting model from the KSD-D/Q rotor series. Pick the application that matches your space.

Access Calculator

Dew Point & Moisture Converter

Convert air temperature + relative humidity into dew point, grains/lb and g/kg — the numbers you actually size a desiccant dehumidifier on.

Open Converter

Desiccant Technology & KSD Model Selector

Enter your conditions and airflow — get a technology recommendation (refrigerant, rotary desiccant, or liquid desiccant) and a candidate Koven KSD model.

Find Your Model

FAQ, Commercial Desiccant Dehumidifiers

Expert answers regarding performance, sizing, and applications for Koven desiccant and refrigerant systems.

What is the difference between a rotary and a liquid desiccant dehumidifier?

A rotary dehumidifier – a continuously-regenerating silica gel unit – circulates air through a continuously rotating, solid desiccant wheel (silica gel or molecular sieve) powered by regeneration heat. It’s compact and built for colder climates and the lowest achievable dew points. A liquid desiccant system involves spraying a solution, like lithium chloride or salt, which absorbs water and can achieve the lowest RH levels, handle salty/corrosive air, and retain dehumidification capacity within the solution. Koven produces both designs: the rotary in its KSD series and the liquid in a separate product line.

Is a desiccant dehumidifier better than a refrigerant dehumidifier?

This isn’t a universal answer, and it really depends on temperature and target dew point. At or below approximately 40°F dew point, or for air below around 10°C, refrigerant systems will either fail to meet performance or experience frost, leaving desiccant as the only practical option. For a warm space and a more modest humidity target, a refrigerant unit is typically more cost-effective to operate. The two systems are complementary, not competitors.

What are the disadvantages of a desiccant dehumidifier?

There are two drawbacks to this, both of which are manageable: heat for regeneration is consumed (which is the biggest cost component, but it can be reduced by heat recovery), and it will heat up the process air by around 13°C (13°C / ~23°F) as it passes through the rotor. While this can be a problem in a warm space, it’s beneficial in a cool room or rink. Koven’s combination units include cooling coils that deliver the supply air at a useful temperature.

What dew point can a commercial desiccant dehumidifier reach?