# Consider a homeowner who is replacing his 25-yearold natural gas furnace that has an efficiency...

## Question:

Consider a homeowner who is replacing his 25-yearold natural gas furnace that has an efficiency of 55 percent. The homeowner is considering a conventional furnace that has an efficiency of 82 percent and costs $1600 and a high-efficiency furnace that has an efficiency of 95 percent and costs$2700. The homeowner would like to buy the high-efficiency furnace if the savings from the natural gas pay for the additional cost in less than 8 years. If the homeowner now pays \$1200 a year for heating, determine if he should buy the conventional or the highefficiency model

## Furnace:

A furnace is an enclosed area in which a high amount of heat is produced at a very high temperature to remove the valueless material known as gangue by the process of smelting. In this process, the base material is extracted from the ore found during mining.

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Given Data

• Efficiency of natural gas furnace, {eq}{\eta _{NG}} = 55\% {/eq}.
• Efficiency of conventional furnace, {eq}{\eta _L} = 82\% {/eq}.
• Ef...

Types of Heating & Cooling Systems

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Chapter 10 / Lesson 9
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You can choose from a number of different heating and cooling systems to make your home comfortable to live in. Watch this video to learn about the advantages and disadvantages of forced air, radiant heat, baseboard heat and geothermal systems.