Last evening The Weather Channel said we would have lows in the low 40s and the house was down around 70F so I decided to see what the Hamilton would do. The reason that I only have used it for lightweight fabrics is that it can't be vented outdoors. It is a front discharge design with a lint screen that lets a lot of fine lint out in the air stream. I have a pair of pantyhose stretched around the rectangular discharge chute secured with a big rubber band. The toes of the hose are attached to one of those hangers with two clips on adjustable bars like for slacks or skirts. I hang that from a hanger hanging from an overhead pipe so my aim is to go for fabrics that don't shed a lot of lint But last night I decided to try a standard load of heavy and medium weight cottons. This load is always spun out to a uniform dampness in the Miele W1986 and takes 80 minutes in the GE inside dryer and 70 minutes in the KitchenAid inside dryer, both electric and drawing 5600 watts maximum, and 60 minutes in the KitchenAid gas dryer outside with a 37K BTU modulating burner which holds the dryer temperature at 160F from within 5 minutes of starting. I put the load in and set the heat to high and the timer for 60 minutes. Faint Filtrator fragrance of ozone and hot steamy cotton, BUT at the end of 60 minutes including the 3 minute cooldown, everything was dry and comfortably warm. I forgot to measure the operating temperature, but will do so with a future load. This original style clothes dryer was efficient. This original design has just a 7 inch fan with, I think, 4 blades and a maximum draw of 4700 Watts.
Hamilton invented the dryer and the air flow with the heat contained in the upper part of the dryer chamber and the fabrics exposed to the radiant heat of the electric element. Air is pulled in at the top and passed over the heater then is sucked out the bottom of the dryer. Hamilton called it the "carrier current" and the funny thing is that it depended on the moisture in the dryer's atmosphere to move the heat down. Once the clothes are dry, the upper part of the cylinder is still very warm, but down at the bottom of the cylinder, the clothes are just warm unless you overdry. Running it without heat does not cool the upper part of the drying chamber. Tumbling the fabrics in the steamy atmosphere made for softer clothes, but not as soft as Filtrated fabrics, although at much lower temperatures.