11/09/2025
💭 Have you ever done this?
Sharpie math on the inside of an RTU door…?
A notepad full of math equations…?
An iPad open to view your temperature probes…?
A laptop with a spreadsheet and a glared screen...?
All just to verify economizer outside air percentage?
If you’ve been there — you know the drill.
You’re doing everything right, you're using the temperature method to calculate actual OA%. In the example shown here, the technician did exactly that:
- He started at 30% damper position and calculated a whopping 51% outside air
- He discovered that what was set as a “5% damper position” actually resulted in 20% outside air — and only after multiple readings and calculations.
That’s a lot of work for accuracy… and it leaves you susceptible to make a simple yet critical math error along the way, costing you time, money, and frustration.
The truth is, "set it to 15% and get out of there" just doesn't cut it. “15% damper = 15% outside air” is rarely accurate.
Real-world airflow, pressures, actuator installation, and mechanical tolerances make every system unique — and every economizer sets up differently.
That’s exactly where the EcoMeter OAP-46 comes in.
With the OAP-46, you can:
✅ Instantly measure actual Outside Air Percentage
✅ Set your economizer’s minimum occupied position with TAB-level precision
✅ Skip the manual math, notes, and trial-and-error altogether
Fast, repeatable, and built for the field — because accuracy shouldn’t require algebra on a metal door.
Providing Accuracy for the Average Tech.
Technician Built Tools | TAB Level Precision
www.ecometerusa.com
