Introduction
A ductless fume hood is a laboratory ventilation and safety device that protects the operator from hazardous fumes, vapors, and particulates by filtering the contaminated air and recirculating the cleaned air back into the laboratory, without the need for ductwork or an exterior exhaust system, making it a flexible and easy-to-install solution for fume containment. The fume hood draws room air into the work chamber through the front opening, passes the contaminated air through a filtration system, typically activated carbon filters for organic vapors and HEPA filters for particulates and aerosols, and then returns the filtered air to the laboratory; the filters must be selected according to the specific chemicals used, and their saturation must be monitored and the filters replaced regularly to maintain safe operation. Ductless fume hoods are easy to install and relocate, since they do not require connection to the building ventilation system, and they consume less energy than ducted hoods because the conditioned air is recirculated, making them suitable for laboratories where ducted hoods are not feasible, such as teaching laboratories, temporary facilities, and laboratories in rented spaces. They are used in chemistry, biology, pharmaceutical, and industrial laboratories for working with moderate amounts of chemicals, for sample preparation, for weighing hazardous powders, and for applications where the quantities and hazards are within the capacity of the filtration system, and they are available in various sizes and configurations. Features include airflow monitoring, filter saturation indicators, alarms, and a choice of filter types. With their flexibility and ease of installation, ductless fume hoods are practical and effective solutions for fume and vapor containment in many laboratory settings.
Ductless Fume Hood LFH-T2025
Ductless fume Hood has a dimension of 1200 × 880 × 2140 mm, providing a compact spacious design. It offers an air capacity ranging from 105 to 230 m³/h, ensuring efficient airflow for...
Ductless Fume Hood LFH-T2024
Ductless Fume Hood offers an airflow capacity of 690 m³/h with a face velocity of 0.4 to 0.6 m/s. It features a unique solid physicochemical material. A silent turbine fan is equipped t...
Ductless Fume Hood LFH-T2022
Ductless Fume Hood is a floor standing unit offers 1410 × 690 × 740 mm chamber dimension, 650 mm maximum opening and 4 pcs chemical filter. Equipped with UV lamp for effective steriliz...
Ductless Fume Hood LFH-T2023
Ductless Fume Hood is a floor standing unit offers 1710 × 690 × 740 mm chamber dimension, 650 mm maximum opening, and 4 pcs chemical filter. Equipped with UV lamp for effective sterili...
Ductless Fume Hood LFH-T2020
Ductless Fume Hood has internal dimensions of 920 × 840 × 940 mm, providing ample workspace. It delivers an air treatment capacity ranging from 220 to 1200 m³/h for efficient removal ...
Ductless Fume Hood LFH-T2021
Ductless Fume Hood offers a chamber of dimensions 1110 × 690 × 740 mm with a maximum opening of 650 mm, 2 pcs chemical filters. It is equipped with advanced a UV lamp for effective ste...
Standards
ASHRAE 110-Method of Testing Performance of Laboratory Fume Hoods
Complies with the above standards, but is not limited to them.
Features
1. Ductless fume hood with filtration system for chemical fume containment without external ducting.
2. Activated carbon and HEPA filtration removes chemical vapors and particulates from recirculated air.
3. Suitable for laboratories where external ducting is impractical or for light chemical use.
4. Filter saturation monitoring with alarm for timely filter replacement.
5. Includes hood enclosure, sash, filtration system, airflow monitor and lighting.
FAQ
Q1: What testing scenarios is this hood mainly applied to?
A: The ductless fume hood is used in teaching laboratories, small research facilities, dental offices, pharmacy compounding, industrial quality control and shared laboratory spaces to provide chemical fume containment without requiring connection to an external exhaust duct system. It supports light chemical manipulation, educational chemistry demonstrations, pharmacy compounding, sample preparation with moderate hazard chemicals, small-scale synthesis, and applications where installing external ducting is impractical, costly or prohibited by building constraints. The filtration system cleans the air before recirculating it into the room, providing operator protection and flexibility in placement. It is essential for facilities needing fume containment where ducted hoods cannot be installed, for light to moderate chemical use, for temporary or mobile laboratory setups, and for educational environments, where the ductless design provides flexibility, energy efficiency and ease of installation while still protecting operators from chemical fumes and particulates through effective filtration.
Q2: What standards does the fume hood comply with?
A: The ductless fume hood is designed with reference to ANSI AIHA Z9.5 for laboratory ventilation, ASHRAE 110 for fume hood performance, and relevant GB standards. Filtration performance follows applicable standards for chemical fume hood filtration. Face velocity and containment should be verified after installation. Filter media should be appropriate for the chemicals used.
Q3: What is the warranty period for the whole machine and key components?
A: The whole fume hood is covered by a 12-month warranty. The enclosure, sash, fan, airflow monitor and lighting are covered, while filters, gaskets and bulbs are consumables excluded from warranty. Damage from improper chemical use beyond filter rating or unauthorized modification is excluded.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires trained laboratory personnel familiar with fume hood safety, chemical handling and filter maintenance. We provide an operation manual and remote guidance. Proper sash position, chemical compatibility with filters, filter monitoring and replacement are important for effective containment and safety.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Face velocity verification should be performed annually or after filter replacement. Filter saturation monitoring should be checked regularly with replacement per manufacturer schedule or alarm indication. Full containment testing periodically. Airflow monitor calibration per manufacturer schedule. Sash and fan mechanism checked periodically.
Q7: Are supporting consumables universal?
A: Filters are specific to the hood model and chemical type, available from the manufacturer or authorized distributor. Gaskets and bulbs may be more universal. Long-term consumable cost includes regular filter replacement, which depends on chemical usage and types.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes interior dimensions, filter type (chemical-specific or broad-spectrum), airflow capacity, material grade and safety features. Custom orders require chemical usage assessment for proper filter selection. Users should provide chemical types, quantities and usage frequency before configuration.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes the fume hood with an operation manual. On-site installation, commissioning and face velocity verification are recommended and can be arranged at additional cost. Operator training and filter replacement guidance are typically included. Site preparation guidance is provided before delivery.
Q10: What types of chemicals are compatible with this equipment?
A: The ductless fume hood is suitable for light to moderate use of chemicals compatible with the installed filter media. It is NOT suitable for highly toxic, carcinogenic, radioactive or high-quantity volatile chemicals that require ducted exhaust. Perchloric acid, mercury and certain chemicals require special handling or ducted hoods. Users must verify chemical compatibility with the filter media, monitor filter saturation regularly, replace filters promptly when indicated, avoid using chemicals beyond the hood rating, and ensure proper face velocity. A chemical risk assessment should be performed before use to confirm the ductless hood is appropriate for the intended applications.
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