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HVAC Systems: So, What Is a Micron, Anyway?
Apparatus Components, Articles, Features

HVAC Systems: So, What Is a Micron, Anyway?

Jul 13, 2026 | Apparatus Components, Articles, Features

The part salesman gives a micron rating for his fuel filter. Your high school physics teacher told you that the sun’s gravity at the distance...

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What the HVAC System Needs
Apparatus Components, Articles, Features, Fire Apparatus

What the HVAC System Needs

May 8, 2026 | Apparatus Components, Articles, Features, Fire Apparatus

By Kevin Roberts  Last time we discussed what heat is. If you haven’t already, you should read that one first. There are many ways to...

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Introduction to Emergency Vehicle HVAC: What is Heat?
Ambulances, Apparatus Components, Articles, Features, Fire Apparatus, Fire Command Vehicles, Hazmat Trucks, Ladder Trucks, Pumpers

Introduction to Emergency Vehicle HVAC: What is Heat?

Apr 10, 2026 | Ambulances, Apparatus Components, Articles, Features, Fire Apparatus, Fire Command Vehicles, Hazmat Trucks, Ladder Trucks, Pumpers

One of the occupational hazards of an emergency vehicle technician (EVT) Trainer who emphasizes basic principles is the complaint that the...

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