Exhaust Fans

Exhaust fans remove moisture, heat, odours and fumes from bathrooms, kitchens, garages, attics and industrial workshops. This tag collects CFM sizing rules, duct-length effects, safe replacement procedure and comparisons of wall, ceiling and roof-mounted LONGWELL exhaust ranges.

Crawl space ventilation fan installed in a foundation vent
By longwell / September 6, 2026 / Fan Engineering Guides

Crawl Space Ventilation Fan Guide

Ventilating a crawl space sometimes dries it out and sometimes makes i...

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Food truck exhaust hood blower mounted on a mobile kitchen roof
By longwell / September 5, 2026 / Fan Engineering Guides

Food Truck Exhaust Hood Blower

A food truck hood does everything a restaurant hood does, in a fractio...

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Upblast and downblast roof exhaust fans installed on a flat roof
By longwell / September 5, 2026 / Fan Engineering Guides

Roof Exhaust: Upblast vs Downblast

The difference is where the air goes when it leaves. Upblast throws it...

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duct fan vs exhaust fan
By longwell / August 5, 2026 / Technical Articles

Duct Fan vs Exhaust Fan: What are the Differences?

Effective ventilation is essential for maintain indoor air quality, co...

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LONGWELL top 5 bathroom exhaust fan
By longwell / July 30, 2026 / Technical Articles

Top 5 Exhaust Fans for Bathrooms in 2026: Quiet & Energy Efficient

The bathroom is usually damp and hot, especially those without windows...

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LWPVE-1530T-01
By longwell / July 29, 2026 / Engineering Case Studies

LWPVE-1530T-01 Exhaust Fan for Large Industrial Ventilation

Longwell engineers a 1530mm industrial exhaust fan to deliver 51,000 m...

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poultry fan
By longwell / July 21, 2026 / Engineering Case Studies

LWPVL-1270T Poultry Barn Exhaust Fan for 51,000 m³/h Airflow

Case study on a high-volume ventilation solution for poultry barns, de...

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LWEA2E250SM-082
By longwell / July 17, 2026 / Engineering Case Studies

LWEA2E250SM-082 220V AC Axial Fan for Enclosure Ventilation

An OEM required a 220V AC axial fan delivering 1627 m³/h with document...

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By longwell / March 30, 2026 / Engineering Case Studies

Longwell LWEA Series: High-Performance Centrifugal Exhaust Fans for HVAC & Ventilation Systems

Engineered for HVAC and ducted ventilation, Longwell's LWEA series cen...

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Why-Restaurants-Prefer-Centrifugal-Fans
By longwell / December 3, 2025 / Technical Articles

Why Restaurants Prefer Centrifugal Fans for Grease Removal and Air Purification

Why Restaurants Prefer Centrifugal Fans for Grease Removal and Air Pur...

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