Direct radiation from stoves, or other heating apparatus, except open
fireplaces, is, moreover, economical of fuel, but, on the other hand,
unless abundant ventilation is provided, the atmosphere in rooms thus
warmed soon becomes unfit for respiration.

Now you may stop and think. Next time you shall have the conclusion of
the whole matter.




LETTER XXXIX.

From John.

HOW TO DO IT.


MY DEAR ARCHITECT: I'm in a hurry. Let me ask you a few square
questions. Give me square answers if you can; if not, say so. What
kind of a furnace shall I get? I've interviewed about a dozen; each
one is warranted to give more heat, burn less coal, leak less gas,
give less trouble and more satisfaction, than all the others put
together. I suppose you object to cast-iron, because it's liable to be
heated red-hot and burn the air.

Is wrought-iron any better?

Shall I put the registers in the floors or in the partitions?