Abstract: A condensing heat exchanger of the kind having a primary heat exchanger and a secondary heat exchanger connected downstream of and in series with the primary heat exchanger. The secondary heat exchanger is arranged to at least partially condense combustion gases discharged from the primary heat exchanger. The primary heat exchanger comprising a drum having a longitudinal axis and the secondary heat exchanger comprising a plurality of small diameter tubes arranged by the side of the drum and extending parallel with the longitudinal axis of the drum.

Abstract: Disclosed herein is a portable baby wipes warmer and carrier comprising a container with a plurality of compartments including minimally a heating unit storage compartment, a baby wipes storage compartment and a means for carrying the container. The invention utilizes a portable heating unit positioned within a heating unit storage compartment to warm the subject baby wipes and maintain the warmth of the baby wipes for a substantial period of time.