
EN 1886 AHU classes explained: T2, TB2, L1, D1
What each class actually means on site, and how to specify it without over-paying.

From 2,000 to 120,000 m³/h, Huixin designs and manufactures modular, hygienic and energy-recovery air handling units for pharmaceutical, healthcare, data centre and commercial projects across Europe.
Six product families cover the full range of European commercial and industrial applications — from hygienic cleanroom units to magnetic-bearing chillers and ultra-slim units for retrofit shafts.

Double-skin 50 mm casing, thermal break profiles, EC plug fans. The workhorse for commercial and industrial projects.

Stainless steel interior, flush-welded surfaces, no dirt traps — designed for EU GMP Annex 1 and ISO 14644-1 Grade A–D areas.

Rotary wheel, plate or run-around coil recovery with up to 78% efficiency — cuts heating and cooling demand in high fresh-air applications.

Rooftop and outdoor packaged units with integrated inverter compressor, ready to connect — ideal for retrofits with limited plant room space.

Oil-free centrifugal compressor with magnetic bearings: part-load efficiency down to 0.33 kW/ton and dramatically lower maintenance.

Only 480 mm deep — engineered for ceiling voids and retrofit shafts where a conventional unit simply will not fit.
We supply complete air treatment packages — AHU, controls, and documentation — matched to the standards your industry is audited against.

MAU / PAU / RAU architecture, cascading pressure control and full GMP Annex 1 documentation.
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Operating theatres to DIN 1946-4, isolation rooms and hygiene compliance to VDI 6022.
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Redundant N+1 air handling, free-cooling integration and continuous monitoring of temperature and humidity.
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Offices, airports, hotels and retail — comfort and indoor air quality with low specific fan power.
Read more →Send us the basics and our engineering team returns a compliant selection, dimensioned drawings and a budget price — usually within one working day.
Airflow, static pressure, supply / extract temperatures and available space.
Model, casing class, coil rows, filter grades and fan configuration to EN 1886.
DWG and PDF general arrangement, plus electrical and control schematics.
Manufacturing, factory acceptance test, export packing and shipping.
Our Zhuhai facility runs dedicated lines for casing fabrication, coil production, wiring and testing. Every unit is assembled, wired and run-tested before it leaves the factory — so site commissioning is predictable.

Independent type-test reports, Eurovent certification and CE documentation are supplied with every project — not sold as an extra.
Casing strength D1, air leakage L1, thermal transmittance T2, thermal bridging TB2.
Certified performance data for air handling units and energy recovery components.
Coil and recuperator capacity verified under recognised test conditions.
Machinery Directive 2006/42/EC and pressure equipment compliance where applicable.
Quality management system audited annually; full traceability of materials.
Hygienic design and documentation packages for regulated environments.
You talk to the engineers who build the unit — selections are checked against your climate data and standards.
Modular platform means standard configurations ship in 15 days; custom units in 25–30 days.
General arrangement, wiring and control schematics returned within one working day of enquiry.
85+ countries, European voltage and control protocols, English documentation as standard.

What each class actually means on site, and how to specify it without over-paying.

A practical comparison of lead time, cost and flexibility for European projects.

Energy, maintenance and redundancy — the numbers behind the decision.
Send a schedule, a drawing or just a few numbers. You get a compliant selection, budget price and dimensioned drawings back within one working day.