Insulated Water Heater Cuts Costs (Jun, 1931)

Insulated Water Heater Cuts Costs

A NEW and highly efficient type of household hot water heater has recently been perfected which bids fair to revolutionize domestic water heating. The water tank of the heater, shown in the photo at the right, is placed within a sheet iron shell and the space between this shell and the copper tank is filled with many layers of cellular asbestos. Spaces at top and bottom are packed with mineral wool. This insulation so thoroughly seals in the heat that a tankful of water may be kept hot for a period of several days.

In a test a tankful of water was heated to a temperature of 150 degrees, and 48 hours later the temperature was 112 degrees.

7 comments
  1. Stephen says: April 5, 20106:09 am

    So often the inventions here are destined for obscurity. This is something that every sensible person in Scotland has in their house. Not insulating the hot water tank is just throwing away money. I must say, though, that I don’t think ours is insulated with asbestos!

  2. Scott B. says: April 5, 20108:09 am

    Oh, asbestos, once our friend; how you turned on us!

  3. KD5ZS says: April 5, 201011:12 am

    Even today we often put additional blankets on our water heaters. Usually with glass wool.

  4. Toronto says: April 5, 201011:49 am

    We usually have larger tanks, too – that one looks like about 10 gallons/50 litres. I think my current one is 150L, and that’s on the small side.

    But installing one today is a tankless task.

  5. jayessell says: April 5, 201012:28 pm

    Toronto… Your Pun has come to pass!

    There ARE tankless waterheaters.
    They heat the water on demand as it passes through it.

    The electric showerhead waterheaters regularly electrocute
    their users in asia.

  6. KD5ZS says: April 6, 201010:06 am

    Sorry– I only think in gallons not litres.

    Ditto with engine displacement; something about a 427 or 396 sounds better than 6 liters.

  7. Toronto says: April 6, 201010:26 am

    Jay – the “suicide showers” in Mexico aren’t any better than the asian ones. My favorite had a 2 foot long cord, with the duplex outlet high on the wall just outside the shower/euthanasian booth.

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