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DD Series · High-capacity ducted

DD Series — high-capacity ducted inverter dehumidifiers, 140–960 L/day

High-capacity ducted models from 140 to 960 L/day for commercial and industrial applications: indoor pools, warehouses, food production, plant growing, manufacturing and public facilities. Three-phase 380–415 V supply, R-32 refrigerant, Full Inverter technology (inverter compressor and inverter-controlled fan) with precise airflow regulation, an electronic expansion valve (EEV) for maximum refrigerant-circuit efficiency, E-Coating heat-exchanger protection, 5-in-1 air sensor and Modbus RTU RS-485 + Wi-Fi connectivity. Concealed Ultra-Slim installation; single inlet / single outlet, standalone or integrated into central ventilation.

Capacity140–960L/day
Airflow1700–11 000m³/h
Static pressure200–400Pa
Power supply380–415 V
RefrigerantR-32
Air sensor5-in-1

About the DD Series

The DanVex DD Series is a range of high-capacity ducted dehumidifiers for permanent installation in commercial and industrial spaces where humidity control is a continuous operating requirement: indoor pool halls and spas, food and beverage production, warehouses and logistics centres, plant-growing facilities, production halls, museums and archives, and other large-volume environments.

Capacity spans from 140 L/day (DD-168) to 960 L/day (DD-960), with supply airflow from 1700 to 11 000 m³/h and external static pressure from 200 to 400 Pa — sufficient for both standalone loops and integration into central ventilation networks. All models run on three-phase 380–415 V and R-32 refrigerant. Every unit is built in a concealed Ultra-Slim housing for installation in ceiling voids or plant areas; the robust powder-coated steel housing also allows protected outdoor installation where required.

Every model in the series is built on Full Inverter technology: an inverter compressor and an inverter-controlled fan with precise airflow regulation. The compressor continuously varies its output to the actual moisture load — eliminating humidity swings and reducing power consumption — while the fan holds airflow steady against varying duct resistance. The electronic expansion valve (EEV) meters refrigerant flow precisely across the whole operating range, keeping the refrigerant circuit at peak efficiency and capacity under changing loads and conditions. Heat-exchanger protection — E-Coating across the series: an electrochemical anti-corrosion layer deposited uniformly over the entire fin surface, resistant to moisture, mild acids and alkalis, salt vapour and chlorine-laden air.

Models in the range

DD-168  140–210 L/day · 1700–2200 m³/h · 200 Pa · 108 kg · Full Inverter · E-Coating

Indicative coverage: ~150–300 m² depending on conditions

For medium commercial spaces with moderate moisture loads: small indoor pools, medium warehouses, retail food stores, medium grow rooms, public-building basements. Variable power 1830–2520 W, R-32 × 1600 g refrigerant.

DD-240  220–260 L/day · 1900–2700 m³/h · 200 Pa · 119 kg · Full Inverter · E-Coating

Indicative coverage: ~200–400 m² depending on conditions

For larger commercial premises: hotel pool areas, medium warehouses, large food stores, museum archives, large grow rooms. Variable power 3040–4200 W, R-32 × 1800 g refrigerant.

DD-380  300–420 L/day · 3500–3850 m³/h · 200 Pa · 189 kg · Full Inverter · E-Coating

Indicative coverage: ~350–600 m² depending on conditions

For large commercial and light industrial use: commercial pool halls, food and beverage production rooms, large warehouses, humidity-controlled production areas, professional farms. Variable power 4580–6246 W, R-32 × 2500 g refrigerant.

DD-480  480 L/day · 4800–5300 m³/h · 200 Pa · 200 kg · Full Inverter · E-Coating

Indicative coverage: ~450–750 m² depending on conditions

For demanding commercial and industrial environments with high moisture loads and chemistry: large pool halls, food processing with active wet cycles, large-scale plant growing, industrial workshops. E-Coating heat exchanger for aggressive environments. Power 9000 W, R-32 × 2800 g refrigerant.

DD-720  720 L/day · 7500–9000 m³/h · 400 Pa · 422 kg · Full Inverter · E-Coating

Indicative coverage: ~700–1100 m² depending on conditions

For large industrial facilities and multi-zone installations: Olympic pool halls, large food-production lines, high-volume warehouses, multi-room agricultural complexes, integration with central ventilation over long duct runs. Power 15 000 W, R-32 × 5400 g refrigerant.

DD-960  960 L/day · 9000–11 000 m³/h · 400 Pa · 450 kg · Full Inverter · E-Coating

Indicative coverage: ~1000–1500 m² depending on conditions

For very large industrial facilities and central-ventilation integration: the largest pool complexes, large-scale food-production halls, distribution warehouses, multi-zone industrial sites, centralised building humidity management. Power 21 000 W, R-32 × 7200 g refrigerant.

Coverage figures are indicative for typical commercial and industrial conditions (moderate moisture load, ceilings around 3–6 m, ordinary air exchange). The actual choice depends on starting and target humidity, ceiling height, infiltration, process moisture sources and whether the unit runs standalone or within central ventilation. For pool halls, food production with active wet cycles, plant growing with active transpiration and very large open spaces — request precise project sizing: the choice of higher capacities should rest on a moisture-load calculation, not on an area-coverage rule.

Which model should I choose?

The series covers the 140–960 L/day range. Use this table to narrow the choice by capacity, static pressure and airflow — the full parameter set is in the specification table below. Full Inverter and E-Coating are standard on every model.

Selection criterionDD-168DD-240DD-380DD-480DD-720DD-960
Capacity140–210 L/day220–260 L/day300–420 L/day480 L/day720 L/day960 L/day
Supply airflow1700–2200 m³/h1900–2700 m³/h3500–3850 m³/h4800–5300 m³/h7500–9000 m³/h9000–11 000 m³/h
Static pressure200 Pa200 Pa200 Pa200 Pa400 Pa400 Pa
Indicative coverage~150–300 m²~200–400 m²~350–600 m²~450–750 m²~700–1100 m²~1000–1500 m²
Best forMedium commercial halls with moderate loadsLarge commercial halls and hotel poolsLarge commercial and light industrial spacesPools, food facilities and grow rooms — aggressive environmentsLarge multi-zone industrial halls with long duct runsVery large industrial facilities and central-ventilation integration

Where is the DD Series used?

The series targets continuous high-capacity humidity control in commercial and industrial environments — permanent installations where dehumidification is part of the operating specification, not an occasional measure:

Indoor pools & spasWarehouses & logisticsFood production ManufacturingPlant growingMuseums & archives

Application guide

ApplicationTarget humidityTypical loadsRecommended models
Indoor pools, spas and water parks50–60%High latent load from open water; chlorine-laden atmosphereDD-380 · DD-480 · DD-720 · DD-960
Food production halls45–60%Process moisture; cleaning cycles; aggressive cleaning agentsDD-380 · DD-480 · DD-720
Warehouses and distribution50–65%Infiltration moisture; loading-dock draughts; condensation preventionDD-240 · DD-380 · DD-720 · DD-960
Plant growing (indoor cultivation)50–65% vegetative / 40–55% floweringContinuous transpiration; tight RH targets; cyclic loadsDD-240 · DD-380 · DD-480 · DD-720
Manufacturing (general)40–60%Process moisture; corrosion protection of stored materialsDD-168 · DD-240 · DD-380 · DD-480
Museums, archives and libraries45–55% (stable)Low load but tight RH stability; valuable contentsDD-168 · DD-240 · DD-380
Pharmaceutical and clean production30–50%Strict RH control; HEPA-compatible duct networkDD-168 · DD-240 · DD-380 (with downstream HEPA)
Central-ventilation integration (large facilities)Per projectLong duct runs; multi-zone distribution; BMS integrationDD-720 · DD-960 (high static pressure)

Concealed installation and central ventilation

The Ultra-Slim housing blends invisibly into the building structure, and the single-inlet / single-outlet airflow gives freedom in duct routing. The unit works standalone as a dedicated dehumidification loop, or integrated as the humidity-control stage within a central ventilation system.

Concealed Ultra-Slim housing. The low-height rectangular housing is designed to sit inside ceiling voids, plant areas, service shafts and mechanical rooms — invisible in the finished room, with only the intake and supply grilles showing. Galvanised steel with powder coating, rated for indoor installation as standard; with proper fixing the larger models tolerate protected outdoor installation.

Standalone or integrated into central ventilation. Every DD unit has one return-air inlet and one supply outlet. In standalone mode the unit draws return air from the room, dehumidifies, filters and returns it — the simplest deployment for a single room or small zone. In integrated mode the supply outlet connects to the central ventilation distribution network: the unit becomes the humidity-control stage in the building's air handling, in series with the main AHU or in parallel with fresh-air equipment. Static pressure of 200 Pa (DD-168…DD-480) or 400 Pa (DD-720 / DD-960) is sufficient for long runs and multi-room distribution networks.

How does DD compare with the alternatives?

The DD Series is not the only way to dehumidify a commercial or industrial space. Each alternative has conditions where it is justified; an honest comparison:

AlternativeWhen it beats DDWhen DD is better
Mobile unit (e.g. DanVex DEH-i)Site work is occasional or temporary (post-flood restoration, drying after a leak, seasonal use, rotation between sites). Lower capital cost; no installation works.Permanent installation, continuous daily operation, ducted distribution to several rooms, large volumes, building-aesthetics requirements (invisible equipment).
Wall- or floor-mounted unit (DanVex DEH-WP Series)Single-room installation without ductwork; no ceiling void for a concealed unit; budget-sensitive projects at smaller volumes.Distribution to several rooms from one unit; aesthetic requirements (invisible installation); capacities above 140 L/day; integration with existing ventilation.
Central ventilation with humidity control (AHU with reheat coil or DX stage)New construction with humidity control specified at AHU level; coordinated operation with the rest of the HVAC; very large multi-storey facilities.Retrofit of existing buildings where the AHU does not reach the target humidity; dedicated humidity duty without modifying the existing AHU; faster schedule; cheaper than an AHU upgrade.
Adsorption dehumidifier (DanVex AD Series)Target humidity below 35% at room temperature; dehumidification in cold environments (below +5 °C, where condensation units lose efficiency); industrial drying at very low dew points.Standard commercial and industrial targets (40–65%) at normal temperatures (+15…+30 °C); lower purchase and running cost; simpler maintenance.

Key technologies — at a glance

  • Full Inverter technology across the series — inverter compressor, inverter fan and electronic expansion valve (EEV) working as one system: the compressor continuously varies output to the actual moisture load, the fan stabilises airflow and the EEV meters refrigerant precisely — no humidity swings and lower consumption than fixed-speed units
  • E-Coating across the series — an electrochemical anti-corrosion layer applied by immersion, coating the entire fin surface including inner and shaded zones for complete 360° protection; resistant to moisture, mild acids and alkalis, salt vapour and chlorine-laden air
  • Hot Gas Defrost — a fast defrost cycle versus around 30 minutes for natural defrost; operation from +5 °C with no appreciable capacity loss
  • Concealed Ultra-Slim housing — a low-profile housing for installation in ceiling voids and plant areas; only the intake and supply grilles are visible in the finished room
  • 5-in-1 air quality sensor — CO₂, PM2.5, TVOC, relative humidity and temperature on the return-air stream; every reading on the display, in the app and over Modbus
  • UV sterilisation lamp + anion generator — standard across the series; reduces bacteria, mould spores and pathogens without chemical dosing
  • Internal Antifungus treatment — an antimicrobial coating on wet internal housing surfaces suppresses mould and bacterial growth, supporting hygiene-sensitive applications
  • G4 + F7 filtration — two-stage particle filtration (coarse + fine) on the return stream; F7 captures fine dust and allergens. HEPA filtration is not standard in the series — for HEPA H13 requirements see the DD-F Series or downstream filtration
  • Wi-Fi + Modbus RTU RS-485 — Modbus RTU RS-485 for BMS / SCADA integration, and Wi-Fi for control and monitoring via the app — two independent remote-control channels. Auto-restart keeps all settings after a power failure

Technical specifications — DD Series

ParameterDD-168DD-240DD-380DD-480DD-720DD-960
Dehumidification capacity (30 °C / 80% RH)140–210 L/day220–260 L/day300–420 L/day480 L/day720 L/day960 L/day
Supply airflow1700–2200 m³/h1900–2700 m³/h3500–3850 m³/h4800–5300 m³/h7500–9000 m³/h9000–11 000 m³/h
External static pressure200 Pa200 Pa200 Pa200 Pa400 Pa400 Pa
Rated power1830–2520 W3040–4200 W4580–6246 W9000 W15 000 W21 000 W
Current2.7–3.8 A4.6–6.4 A6.9–11.6 A16 A26 A37 A
RefrigerantR-32 × 1600 gR-32 × 1800 gR-32 × 2500 gR-32 × 2800 gR-32 × 5400 gR-32 × 7200 g
Noise level (1 m)< 45 dB(A)< 48 dB(A)< 50 dB(A)< 55 dB(A)< 55 dB(A)< 55 dB(A)
Return-air duct350×350 mm350×350 mm750×450 mm750×450 mm1200×450 mm1200×450 mm
Supply-air duct350×350 mm350×350 mm818×313 mm818×313 mm1058×348 mm1058×348 mm
Dimensions (L×W×H)1250×820×600 mm1250×820×600 mm1370×1120×720 mm1370×1120×720 mm1700×1642×720 mm1700×1642×720 mm
Net weight108 kg119 kg189 kg200 kg422 kg450 kg
Operating humidity range45–100% RH
Operating temperature range+5…+38 °C
Voltage / frequency380–415 V three-phase / 50–60 Hz
Inverter systemFull Inverter
Heat-exchanger protectionE-Coating
Defrost systemHot Gas Defrost
FiltrationG4 + F7
Air purificationUV sterilisation + anion generator
Internal Antifungus treatmentYes
Air quality sensor5-in-1: CO₂ · PM2.5 · TVOC · RH · T°
ConnectivityWi-Fi + Modbus RTU RS-485

Frequently asked questions

How do I calculate the moisture load for a commercial or industrial space?
Moisture-load (latent-load) calculation follows the same framework as cooling-load calculation in commercial HVAC. The total latent load is the sum of internal sources: people (typically 40–70 g/h per person at moderate activity), process moisture (cooking, laundry, pool evaporation, plant transpiration, drying processes), infiltration of humid outdoor air; boundary sources: water-vapour migration through walls and permeable surfaces, drying of wet building materials; and operational sources: moisture from cleaning cycles, condensation on cold surfaces, peaks of intermittent occupancy. For typical commercial applications ASHRAE gives moisture-release rates by occupancy type, process and infiltration model. Indoor pool halls require a separate calculation to ASHRAE TC 9.6 accounting for water-surface area, water temperature, hall air temperature and activity factor. For precise sizing, pass DanVex the project data — the dealer network brings in engineering support for the moisture-load assessment.
What is Full Inverter technology and why does it matter in industrial dehumidification?
Full Inverter is an inverter system: an inverter compressor and an inverter-controlled fan working as a single pair. The compressor continuously varies its speed to the actual moisture load instead of running at fixed speed in on/off cycles. Three practical results: (1) stable humidity — fixed-speed units overshoot and undershoot the set-point in every cycle with swings of ±10–15% RH, inverter units hold ±2–3% RH; critical for museums, pharmaceutical production, plant growing and any application with tight tolerances. (2) Energy efficiency — at part load (the usual operating point most of the time) the inverter compressor draws less than a fixed-speed unit running flat out and cycling; typical savings 20–40% a year. (3) Compressor life — fewer starts and stops, less mechanical stress, longer service life. Across the DD Series this system is completed by an electronic expansion valve (EEV): airflow and refrigerant flow are regulated continuously together, preserving capacity and efficiency under variable load.
What is E-Coating and why does DanVex apply it across the whole series?
E-Coating (electrochemical deposition coating) is an anti-corrosion treatment of the aluminium fins of the heat exchanger. The coating is applied by immersing the exchanger in an electrically charged bath: a polymer layer is deposited uniformly over the entire fin surface — including inner and shaded zones unreachable by spraying or dipping — for complete 360° protection. E-Coating resists moisture, mild acids and alkalis, salt vapour and chlorine-laden air, which covers the whole spectrum of DD Series environments: warehouses, food production, manufacturing, museums, plant growing, indoor pool halls. DanVex fits E-Coating on every model in the series; standardising heat-exchanger protection on one proven technology simplifies specification and guarantees the same corrosion resistance at any chosen capacity. The right model is selected by moisture load, airflow and static pressure — not by coating type.
What static pressure does my duct network require?
External static pressure (ESP) is the resistance the unit's fan must overcome in the duct network: the sum of duct friction (proportional to length and air velocity), fittings (elbows, transitions, dampers), filter pressure drop (rising as filters load), grilles, diffusers and silencers where fitted. Typical industry values: short residential and small-commercial loops 80–150 Pa; standard commercial networks 150–250 Pa; extended or multi-zone industrial networks 250–400 Pa. For correct selection, an HVAC engineer calculates the total pressure drop from the project's actual duct geometry and adds a 20% margin for filter loading over time. The DanVex DD Series offers two levels: 200 Pa on DD-168 / DD-240 / DD-380 / DD-480 (standard commercial and industrial duty) and 400 Pa on DD-720 / DD-960 (industrial scale and central-ventilation integration on extended networks). Select a unit with at least 20% margin above the calculated value to secure airflow for the whole service life.
What humidity level should I maintain in common industrial applications?
Standard targets differ by application: indoor pool halls 50–60% RH at +28…+30 °C water and +30 °C air (above 60% chlorine off-gassing rises sharply); food production 45–65% by product category — drier for cured products and chocolate (30–50%), higher for fermentation rooms (70–85%); plant growing 60–70% in the vegetative phase and 40–55% in flowering (against bud rot); warehouses and logistics 50–65% for general goods and 30–45% for electronics and metal storage; museums and archives 45–55% with ±5% stability to ISO 11799; pharmaceutical and clean production 30–50% to GMP requirements with tight tolerance; manufacturing 40–60% for general work areas and lower for specific processes (composite processing, electronics assembly). Industrial sizing is driven by moisture load — the intensity of process moisture release, infiltration and occupancy — not by floor area alone. For precise project recommendations the DanVex dealer network brings in engineering support.
What is Hot Gas Defrost and how does it differ from natural defrost?
When a dehumidifier operates below about +15 °C, the evaporator coil temperature falls below zero and condensate freezes on the fins as ice — the unit starts a defrost cycle. Natural defrost stops the compressor and lets the fan blow room air through the frozen coil until the ice melts — this takes 20–30 minutes, during which the unit produces no useful dehumidification. Hot Gas Defrost routes hot compressor gas directly into the evaporator through a bypass valve: the ice melts quickly and normal operation resumes — a significantly shorter interruption, critical for continuous industrial applications where humidity must stay stable around the clock. Hot Gas Defrost also extends the operating range: condensation dehumidifiers with natural defrost lose useful capacity below about +12 °C, while with Hot Gas Defrost practical operation extends down to +5 °C without appreciable capacity loss. All DanVex DD models include it as standard, as do DD-F and DD-FX.
Does a dehumidifier replace humidity control in an air handling unit, or do they work together?
Both approaches are used in commercial and industrial HVAC, and the right choice is decided by the project. Built-in control in an air handling unit (AHU) uses a reheat coil or an integrated dehumidification section; the AHU delivers conditioned air at set temperature and humidity in one path — suitable for new projects where the humidity function is specified from the outset and the total load justifies the cost of the extra equipment. A dedicated dehumidifier in series or parallel with the AHU — such as the DanVex DD Series — is installed into the duct network before or after the AHU, or on a dedicated humidity-control loop. This is the typical choice for retrofits where the existing AHU does not reach the target humidity, or where the humidity function is a local requirement (one zone, one application) rather than a building-level specification. Standalone dehumidifiers are cheaper in capital cost than an AHU upgrade, faster to schedule and simpler to maintain. In many large facilities the approaches coexist: the AHU holds general humidity within ±10%, dedicated dehumidifiers in critical zones hold tighter tolerances.

Explore further

Ducted dehumidifiers — overview and selection guide →
DD-F Series — compact units with fresh-air valve and HEPA H13 (32–155 L/day, single-phase) →
DD-FX Series — Split System climate control: dehumidification + cooling and heating + humidification →
DEH-K Series — stationary industrial units 240–1 000 L/day (non-ducted alternative) →
DEH-WP Series — wall- and floor-mounted for pools and museums (non-ducted) →