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Sizing Your System
One of the common mistakes businesses make is using heating and air conditioning systems that are inappropriate to their space needs or particular activity. 

Restaurants and dry cleaners, for instance, need larger capacity air conditioning systems to handle their high heat output. 

If you run your heating or cooling system for long periods of time and still can't keep temperatures in the comfort range, you probably need to talk with an expert. 

On the other hand, a heating system that is too large for your needs will also cost you money in reduced seasonal efficiency.

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Related Topics

Sizing your system

Types of equipment

Combustion efficiency

Seasonal efficiency

If you have heat pumps

Setting your heat pump thermostat

Tables

Table 1: Fuel Savings From Energy Saving Improvements

Table 2: Recommended Air Velocities