A method for killing pests including bed bugs in an affected area comprises heating a fluid to a first temperature and supplying the fluid to each of a plurality of heat exchanger units. The method continues by positioning each of the plurality of heat exchanger units within an associated region of an affected area, each heat exchanger unit being operable to emit heated air by transferring heat from the fluid to ambient air within the affected area. The method concludes by positioning a plurality of air movers proximate to each of the plurality of heat exchanger units, the plurality of air movers being operable to circulate heated air emitted by the plurality of heat exchanger units and inhibit stratification of the heated air. In operation, a temperature difference between the fluid received by the plurality of heat exchanger units and the ambient air within the affected area results in the affected area being raised to a target temperature greater than 122 degrees Fahrenheit.
