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Calculators

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Combustion Efficiency Calculator

Combustion Efficiency Calculator

This calculator determines the efficiency of a boiler from the CO2 content of the flue gas and the flue gas temperature. It also indicates the percentage of excess air being supplied.
$76.95
Ducting Calculator

Ducting Calculator

A complete calculator for determining duct sizes, velocities and pressure losses for large or small ducting systems passing either warm or cold air.
$134.95
Electric Lighting Calculator

Electric Lighting Calculator

This calculator has been designed to give the number and size of lighting fittings for any installation by the lumen method.
$108.95
Feet & Inches to Millimeters Conversion Calculator (Fractional Inches)

Feet & Inches to Millimeters Conversion Calculator (Fractional Inches)

This is a handy pocket-sized instrument designed for converting dimensions measured in feet, inches and fractions of an inch instantaneously to millimeters and vice-versa.
$36.95
Financial Calculator

Financial Calculator

A remarkable instrument for business, purchasing, investment, costing and accounting calculations.
$119.95
Flame-Cutting Calculator for Machine or Manual Flame Cutting

Flame-Cutting Calculator for Machine or Manual Flame Cutting

A disc calculator for rapid and easy calculation of flame-cutting times and quantity of gas and oxygen consumed. Indispensable to estimators and manufacturing engineers.
$98.95
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