422 



ENGINEERING ON THE FARM 



When any heater is put in place the clean-out doors 

 should not be backed up against a chimney or partition. 



After University of Minnesota 



Fig. 325. Hot-air furnace with slip joint, cast-iron type of fire box 



SUMMARY 



In the choice of a system for heating a farm home the 

 decision is generally between a hot-air furnace and hot 

 water. Both systems present certain advantages and dis- 

 advantages. With the hot-air furnace heat can be quickly 

 raised in a cold house and the air kept moist by a water 

 pan in the furnace. When properly installed with outside 



