Looks like you got lucky there. With a crawl space of basement there is a few different ways to insulate. if there are plumbing pipes or heating system down there the walls should be insulated. Many people insulate the ceiling of a basement or crawl. In MOST cases this is the wrong way. By insulatiing the ceiling you are pushing the plumbing and/or heating system out side the heating envelope. This cause efficiency/comfort issues due to unused heatloss from any heatsource and pipes to freeze.
This can be something you can address and often times by fixing eleminate the need for a heater down there all together.
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