Sealpump Engineering Ltd

In-Duct Humidification Systems

Our smart solution for your AHU project

With the patented Orbit Wing in-duct humidification system, air is humidified inside the duct using high-performance micro-drop nozzles. Unlike our Alpha and Viscore direct room systems, these AHU and in-duct solutions require no ceiling or wall-mounted units.

Product range

Orbit Wing In-Duct Humidifiers
Orbit Wing Hybrid AHU
ORBIT MULTI – Humidification for HVAC systems
Corbit In-Duct Humidifier

In-duct humidification at a glance

In-duct humidification introduces moisture directly into HVAC ductwork to achieve and maintain ideal indoor humidity—cleanly, efficiently and with minimal footprint.

General FAQs

What is duct humidification?
The controlled introduction of water vapour inside HVAC ductwork to maintain target indoor humidity levels.

Why is it important?
Consistent humidity supports comfort, product quality and process reliability, while helping to reduce static and dust.

Where is it used?
Offices and public buildings, data centres, manufacturing, museums/galleries, healthcare and education.

What types are available?
High-pressure atomising (e.g., Orbit Wing), evaporative and steam-based options—specified to suit your AHU and application.

How do steam and evaporative/atomising systems differ?
Steam adds heat and uses electricity to generate vapour; evaporative/atomising systems rely on fine droplets and airflow, offering much lower electrical consumption.

Installation FAQs

Can any HVAC system be equipped?
Most ventilation and air-conditioning systems can be integrated; our modular design simplifies retrofit and new build.

Where is it installed?
Within the supply air duct or AHU section, at a position that ensures complete absorption and correct airflow.

Do I need a professional installer?
Yes—correct sizing, positioning and controls are key to performance and compliance.

Performance FAQs

What is the ideal indoor humidity level?
Typically 40–60% RH, depending on the space and process.

How is humidity controlled?
Via step control and pressure regulation, linked to accurate RH sensors and the building control system.

Can it run year-round?
Yes—systems are designed for seasonal operation and variable loads.

How much water/energy is used?
Usage depends on load and airflow; Orbit Wing maximises evaporation efficiency and minimises electrical demand.

Does it affect HVAC performance?
Correctly designed systems integrate seamlessly, with negligible pressure loss and controlled moisture addition.

Maintenance FAQs

How often is servicing required?
Intervals depend on water quality and duty; designs focus on minimal maintenance.

What are common tasks?
Inspection of nozzles, filters and controls, plus routine hygiene checks.

Do I need treated water?
Filtered, softened or RO water is recommended to protect components and ensure consistent performance.

What if hard water is used?
Limescale can form, increasing maintenance and reducing efficiency—water treatment is advisable.

Can it cause mould?
Properly controlled systems deliver the “driest” possible humidification with full absorption, mitigating moisture carryover.

Any health risks?
When installed and maintained correctly to relevant hygiene standards, risks are minimised.

Benefits of in-duct humidification

Up to 98% evaporation efficiency (with the patented Orbit Wing system)
Up to 99% electrical energy saving (vs. electric steam humidifiers)
Modular design for fast, simple installation
Integrates with almost any ventilation or air-conditioning system
No chemicals required for water quality management
Patented combination of step control & pressure regulation
Minimal maintenance

Key features

Extra-short installation time thanks to a pre-assembled click system
The “driest” possible humidification via patented ORBIT WING® technology
Only three basic components for a modular, flexible design
Temperature-resistant up to 85 °C