DanVex DEH-WP Series — inverter pool dehumidifiers, wall and floor mounting, 80–120 L/day

About the DEH-WP Series

The DEH-WP Series is designed for environments where humidity control goes hand in hand with corrosion resistance, airborne-microbe control and continuous operation. What sets it apart from a household unit relabelled as commercial is a set of engineering decisions for harsh surroundings: chlorine vapour above pool water, salt aerosol at coastal sites, organic acids and cleaning agents in food production, air-quality documentation requirements in regulated environments.

The series consists of two models — the DEH-800WP (80 L/day) and the DEH-1200WP (120 L/day). Both share the same premium feature set — differing only in capacity and the size of space covered. The full component-by-component detail is in the Engineering standards section below.

Every DEH-WP unit runs on single-phase 220–230 V at 50–60 Hz, uses R-32 refrigerant and ships ready for wall or floor mounting — the same unit with two mounting options. Operating range +5 °C to +42 °C, IPX4 water protection, Class I electrical protection.

DanVex DEH-WP Series models

Which model should I choose?

Both models share the same feature set. The choice is decided by room size and the intensity of the moisture load — pool water-surface area, room volume and type of use (private or commercial).

If your space is at the upper end of the DEH-800WP range, choose the DEH-1200WP. An undersized unit runs at full load continuously, shortening compressor life and never reaching the target humidity. For spaces larger than the larger model's range, the installation is split across two or more units — more even distribution of dry air and operational redundancy. For pools above 60 m² or rooms above 240 m² — see the ducted DD / DD-F / DD-FX range.

Engineering standards across the series

What makes the DEH-WP a professional pool dehumidifier rather than a relabelled household unit is a set of design decisions shared by both models. Every item below is standard on every DEH-WP unit — not an option, a configuration or a retrofit.

Full Inverter system: compressor + EC fan + EEV valve

At the heart of the DEH-WP is a refrigeration system built entirely on the inverter — three components working together rather than separately:

• Inverter compressor — continuously varies its speed to the actual humidity readings. No on/off cycles, no humidity jumps, no peak current at every restart.
• Inverter EC fan — regulates airflow independently of the compressor, optimising operation in every mode instead of running at a fixed speed.
• Electronic expansion valve (EEV) — replaces the fixed capillary tube with precise electronic control of refrigerant flow across the whole load range.

The result: up to 40% less electricity than fixed-speed units on the same duty cycle. Below 36 dB(A) at one metre — quieter than an ordinary office. Stable humidity without fluctuation. And continuous round-the-clock operation thanks to additional refrigerant cooling of the compressor drive.

E-Coating: corrosion protection where it really matters

The electrochemical anti-corrosion coating (E-Coating) on the evaporator and condenser is one of the DEH-WP's most significant — and least visible — features.

Standard aluminium heat exchangers in pool environments can begin to corrode within 1–3 years under chlorine vapour. In heavily used commercial pools, at elevated chlorine concentrations or in similarly harsh environments, corrosion can appear within months. The same applies to salt spray at coastal sites, acids and cleaning agents in food production, and solvent vapour in industrial environments.

E-Coating — the same technology used in the automotive industry — forms a sealed protective layer that resists:

• Chlorine and chloramine vapour (swimming pools)
• Salt vapour and spray (coastal facilities, brining lines, fish processing)
• Organic acids, oils and cleaning agents (food and beverage production)
• Industrial solvents and chemical vapours (manufacturing, laboratories)

UV lamp + anion generator: active air purification

UV sterilisation

A UV-C lamp in the airflow path destroys bacteria, mould spores and viruses as air passes through the unit — without chemicals, replaceable filters or additional equipment. Particularly effective in:

• Pool environments — bacteria from pool water become airborne and recirculate through the hall; UV neutralises them at source.
• Food production — reduces the risk of microbial contamination in processing and packaging areas.
• Medical and pharmaceutical — supports cleanroom and hygiene protocols.
• Museums and archives — prevents mould forming on paper, canvas, textiles and wood.

Negative-ion generator

The generator produces negatively charged ions that bind to airborne allergens, fine dust and bacteria and settle them. In pool facilities this reduces chloramine irritants — the compounds responsible for eye and skin discomfort in swimmers — which standard ventilation alone cannot fully address.

5-in-1 air quality sensor: what it measures and why

Ordinary dehumidifiers regulate the climate parameters — humidity and temperature. The DEH-WP also monitors air quality alongside them: five parameters at once, all available on the unit display, in the mobile app and over Modbus RTU RS-485 to the building management system:

• CO₂ — a rise indicates inadequate ventilation. In pools and gyms CO₂ rises rapidly with occupancy; the reading is available via the app and Modbus to coordinate ventilation at building level.
• PM2.5 — particles smaller than 2.5 microns: mould spores, bacterial fragments, chloramine aerosol. Elevated PM2.5 in a pool hall is an early warning of microbial activity or chemical off-gassing, detectable before it becomes visible or hazardous.
• TVOC — chemical vapours from cleaning products, pool chemicals, adhesives and coatings. High TVOC is a health hazard and accelerates heat-exchanger corrosion.
• Relative humidity — the primary control parameter, measured precisely and continuously.
• Temperature — ambient temperature monitoring for operational optimisation and documentation.

Built-in monitoring eliminates the need for external hygrostats, transducers and dedicated air-quality sensors for the building management system — reducing installation cost and integration complexity in multi-unit facilities.

Hot Gas Defrost: fast defrost from +5 °C

When the hall cools down, ice forms on a conventional dehumidifier's evaporator, and conventional defrost methods — passive (compressor stop with the fan running) or an electric heater — take 20–30 minutes, during which dehumidification stops completely.

The DEH-WP uses Hot Gas Defrost: warm refrigerant passes directly over the evaporator surface and the cycle completes quickly. The unit operates continuously and effectively from +5 °C — covering lightly heated pool halls, cold storage rooms, early-spring and late-autumn operation, and logistics facilities where temperatures drop below heated-building ranges.

Where is the DEH-WP Series used?

Although swimming pools are the primary application by design, the DEH-WP works in any environment where high humidity combines with corrosive vapours, microbial risks or the need for stable air quality:

Application guide

How does the DEH-WP compare with the market?

Most professional pool dehumidifiers on the European market use a fixed-speed compressor and have no air-purification functions. They are reliable products — built to dehumidify, not to manage air quality. The DEH-WP does both.

Frequently asked questions

Explore further

DEH-800WP — full model page →
DEH-1200WP — full model page →
Ducted DD / DD-F / DD-FX range — for pools above 60 m² →
Full application guide →