I bought some UTH pads which are 15cm X 28cm 7 Watts, so they should be the same wattage as the Ultratherms. I hear people say the Ultratherms get up to good temperatures. I am here and I have the heat pads set up, and they don't feel very warm at all to the hand. I have a thermometer in the tub, and when first switched on, it hardly raises the temperatures. I left it there for about 45 minutes and the temperature gradually rose, and is about JUST enough (88F) and not quite, but it took 45 mins to get there.
When using more powerful heat pads, the temperature would go up to a steady temperature very fast and stay there. With these, it seems to take forever for the temps in the tub to rise, but eventually it does seem to get there.
Is this a problem? Mind you, it is in a closed rack, three sides closed. And it is noon here and the weather is just starting to get cold these few weeks, no where near coldest yet, so I have no idea if these are just not hot enough and I have to replace them or not.
By the way, I first tested with only one level of the rack switched on, and it was barely hot enough. So I then tested to turn the whole rack on, every level heated, and it did NOT make much difference in the temperature in each tub! Still the same 88 F 89 F or so.
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