Furnace’s Thermostat Setting: On vs. Auto

Furnace’s Thermostat Setting: On vs. Auto

On your thermostat, there’s a furnace-fan setting for either “On” or “Auto.” Which option is the best choice? There are devotees of both settings, each believing their setting is the optimum one to choose. But in reality, it’s more...
What Does AFUE Mean?

What Does AFUE Mean?

While an air conditioner’s efficiency is measured by its SEER (Seasonal Energy Efficiency Ratio) rating, an electric or gas- or oil-fired furnace’s efficiency is measured by its AFUE, or Average Fuel Utilization Efficiency. This standard measurement is given in...

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