Decentralized Ventilation Units

Units need only a wall opening, with no ceiling void, duct runs, or plant room.

Retrofit decentralized ventilation adds fresh air to occupied buildings with minimal disruption.

Each room is ventilated according to its own occupancy and needs.

Installation typically takes a few hours per room, without major civil work.

A sleeve fitted through the wall houses the unit and connects inside to outside.

A low-power EC fan moves air in one or both directions.

Ceramic heat exchanger ventilation units store and release heat. Counterflow heat exchanger ventilation units transfer heat continuously. Enthalpy heat exchanger ventilation units transfer heat and moisture.

Filters remove dust, pollen, and fine particles from incoming air.

The external hood protects the unit from rain, wind, and insects.

A neat internal cover provides the room-side finish.

Shutters close when the unit is off, preventing draughts and backflow.

Controllers and sensors manage fan speed, direction, and operating modes.

Reversible fan ventilation units work in pairs, using alternating flow ventilation and ceramic cores for efficient heat recovery.

Dual flow decentralized ventilation units have separate supply and exhaust fans running continuously through a plate or enthalpy core, providing balanced decentralized ventilation.

Larger wall mounted ventilation units deliver higher airflow with energy recovery for classrooms and offices.

Façade ventilation units and parapet ventilation units are integrated into building façades or window sills. Underfloor decentralized ventilation units are also available for raised floors along glazed façades.

Ceiling mounted ventilation units provide energy recovery ventilation for individual rooms with short duct connections to outside.

A decentralized fresh air unit supplies filtered fresh air to a room, sometimes without recovery.

Some façade units include cooling coils connected to chilled water or refrigerant, combining ventilation and cooling.

Enthalpy cores reduce moisture brought in with fresh air, helping control humidity and AC load.

Units with fine filters capture PM2.5 and dust, delivering filtered fresh air ventilation.

Acoustic designs and hoods reduce traffic and outdoor noise entering through the unit.

External hoods and rain louvres protect against heavy monsoon rain.

ASHRAE 62.1 sets minimum outdoor air rates based on occupancy and floor area.

The National Building Code of India (NBC 2016) specifies ventilation requirements for different building types.

The ISHRAE IEQ standard provides Indian guidelines for indoor air quality and ventilation.

Decentralized ventilation sizing starts with fresh air needs based on room occupancy and area, defining room ventilation CFM.

The number of units depends on required decentralized ventilation airflow and unit capacity.

Units are selected to suit wall thickness and core drilling size.

Units are placed for good air distribution, avoiding draughts near occupants.

External hoods are selected to suit the façade, and approvals are considered where needed.

Units are selected for low noise in bedrooms, classrooms, and offices.

Filters are chosen based on outdoor air quality.

Power and control wiring are planned for each unit. Decentralized ventilation ACH targets are also checked where applicable.

Recovery cores reclaim energy from outgoing air, reducing the cost of conditioning fresh air.

EC fans consume very little power.

CO₂ controlled decentralized ventilation and humidity controlled decentralized ventilation adjust airflow to actual needs.

Bypass and night modes bring in cooler outdoor air when conditions allow. Together, these features create an energy efficient decentralized ventilation system.

Each room has its own controller for speed and mode.

Sensors adjust ventilation automatically.

Smart decentralized ventilation and app controlled ventilation units allow control from phones and tablets.

Paired and grouped units are controlled together for balanced operation.

Decentralized ventilation BMS integration through Modbus enables central monitoring.

Units work without ducts, false ceilings, or plant rooms.

Fresh air can be added to existing buildings easily.

Each room is ventilated according to its needs.

Installation is quick, clean, and cost-effective.

Recovery cores reduce energy loss in every room.

Each room has its own air path.

Rooms can be fitted one at a time as budget allows.

Each unit serves a limited area, so large spaces need multiple units.

Each unit needs its own wall opening.

Many units mean more filters to clean.

Units are inside the room, so low noise decentralized ventilation units must be selected.

Multiple hoods may affect façade appearance.

Compress India helps you manage these limitations through careful selection and planning.

Residential decentralized ventilation is an ideal home ventilation system for sealed homes in polluted cities. It is a practical fresh air ventilation system for homes and a flexible alternative to a whole house ventilation system.

Single room ventilation systems keep bedrooms fresh overnight with low noise.

Decentralized ventilation for classrooms keeps CO₂ low and students alert.

Decentralized ventilation for offices improves air quality in cabins and meeting rooms.

Hotel room decentralized ventilation provides individual fresh air for each room.

Room-level units provide fresh air without shared air paths.

Units add fresh air without major structural changes.

Decentralized ventilation is the easiest way to add fresh air where ducts are not possible.

Panasonic offers energy recovery ventilators and room ventilation solutions.

Mitsubishi Electric's Lossnay range includes room energy recovery ventilators.

Systemair offers decentralized ventilation units with heat recovery.

Blauberg offers single room ventilation units with heat recovery.

Other manufacturers also offer quality units. Compress India recommends the best-fit brand for your project.

Filters are cleaned or replaced regularly, which is important in dusty cities.

Cores are cleaned to maintain recovery efficiency.

Fans and motors are inspected and cleaned.

Hoods are cleaned to remove dust, debris, and nests.

Sensors and controllers are checked for correct operation.

Causes: dust buildup.

Solution: Clean or replace filters regularly.

Causes: dirty fans or loose mounting.

Solution: Clean fans and secure the unit.

Causes: poor placement or high fan speed.

Solution: Adjust speed or relocate the unit.

Causes: poor insulation or sealing.

Solution: Re-seal and insulate the sleeve.

Causes: damaged or incorrectly fitted hoods.

Solution: Repair or refit the hood.

Causes: unit near exhausts or pollution sources.

Solution: Relocate the unit or use suitable filters.

Causes: wiring or configuration issues.

Solution: Check wiring and re-pair units.

Decentralized units bring fresh air into rooms without existing ducts.

Replacing simple exhaust fans, or an MEV ventilation system, with heat recovery units improves air quality and saves energy.

Finer filters improve protection from pollution.

CO₂ sensors and app control improve efficiency and convenience.

Push-pull units, continuous balanced units, and wall-mounted ERVs vary in price based on airflow and features.

Core drilling, hoods, sealing, and wiring form part of the installed cost.

Number of rooms, unit type, filtration, smart controls, wall type, and site access all affect the final cost.

Share your room list with Compress India to receive an accurate quotation.