The Tank › Hot water in house not staying hot as long as it used to › Reply To: Hot water in house not staying hot as long as it used to
Hi: Conditioned space is usually where people live. Unconditioned space is usually attic, crawl space, garage or possibly basement.
You want to insulate the cold pipes if you live in a humid climate where cold water in the pipes could create condensation which then gets things wet that don’t like being wet, (like sheetrock). Also, if cold lines run through potentially warm places like the attic, it’s good to insulate the lines so you can actually get cold water.
Two things affecting the hot/cold water mix are incoming ground water temperature and heat loss along the pipe. It sounds like some of your hot plumbing is run in unconditioned space, so good insulation could help a little to offset the colder ground water we have now.