An advertisement describes a portable heater claimed to

Chapter 2, Problem 2.10D

(choose chapter or problem)

An advertisement describes a portable heater claimed to cut home heating bills by up to 50%. The heater is said to be able to heat large rooms in minutes without having a high outer-surface temperature, reducing humidity and oxygen levels, or producing carbon monoxide. A typical deployment is shown in Fig. P2.10D. The heater is an enclosure containing electrically powered quartz infrared lamps that shine on copper tubes. Air drawn into the enclosure by a fan flows over the tubes and then is directed back into the living space. According to the advertisement, a heater capable of heating a room with up to \(300 \mathrm{ft}^{2}\) of floor area costs about $400 while one for a room with up to \(1000 \mathrm{ft}^{2}\) of floor area costs about $500. Critically evaluate the technical and economic merit of such heaters. Write a report including at least three references.