HVAC Fan Types: Axial vs Centrifugal, Subtypes and Maintenance

by LEGOM Technical Team | Sep 15, 2026 | HVAC

There are two primary HVAC fan types: axial and centrifugal. They differ in how air passes through them, and that single difference determines everything else about their performance, application, and where you will find them. Axial fans move air parallel to the...

Freeze Protection Valve: How It Works and How to Install It

by LEGOM Technical Team | Sep 14, 2026 | HVAC Valve

A burst pipe does more damage in an hour than the entire heating system costs. Water expands as it freezes, and pipework that was fine yesterday splits open, usually somewhere inaccessible, usually while nobody is home. A freeze protection valve prevents that. It is a...

Underfloor Heating Leaks: How to Find, Fix and Prevent Them

by LEGOM Technical Team | Sep 13, 2026 | Plumbing, HVAC

A leak in a hydronic heating system is different from a plumbing leak in one important respect: most of the pipework is buried, so you rarely see the water. What you see instead is system pressure falling, and by the time a damp patch appears on the floor the leak has...

Air Purifier for Schools: Filtration, Ventilation and Classroom Air

by LEGOM Technical Team | Sep 12, 2026 | Air Purifier

Fresh, clean air is the basis of a healthy learning environment, yet classroom air quality is rarely measured and frequently poor. Dust from daily activity, mould from humidity, and pollution drawn in from outside accumulate in rooms that many people share for hours...

What Size Heat Pump Do I Need? Sizing by Heat Loss, Not Floor Area

by LEGOM Technical Team | Sep 11, 2026 | Heat Pump

Heat pump size is determined by your building’s calculated heat loss, not by its floor area. Two houses of identical size can differ by several kilowatts depending on insulation, glazing, ceiling height, and orientation, which is why floor area estimates are...