火屋 is read as ほや (hoya) and means lamp chimney.
ほや
hoya
かびや
hut where a fire was kept to keep deer, wild boars, etc. away from fields
かじ
fire
かりょく
firepower
かようび
Tuesday
ひばな
spark
かよう
ひぐち
burner
ひのて
attack
ひもと
origin of a fire
かじば
scene of a fire
こや
one's own house
とんや
wholesale store