I was initially concerned about condensation as well, but the water temp has never dropped below 72 and is usually in the mid 80s. The pool is basically a very large hot tub, so it’s small enough that the water temp is being maintained with short run times. We also have an insulated blanket so we’re not losing a ton of heat over night (believe it or not).
Since the water temperature is always above 70, we shouldn’t be in the danger zone, but could the freezing cold air be a factor and cause condensation?
I never hear sizzling (like mentioned in the post ajw22 referenced) and it’s strange that it’s around the outside edge at the very top of the heater (haha or maybe not strange, what do I know).
One thing I wondered was if this could be from rain or pool water dripping down, getting trapped in that seaand evaporating when it hits the hot heater? We have a salt water pool and the pressure release valve is very close to the heater and sometimes sprays as little water in that direction.
The heater is labeled “pool and spa” heater, so if I was using it to heat a “real” spa, wouldn’t it stand to reason that it could operate in the winter? How do people with spas keep them warm in the winter months?
A friend actually has a small fiberglass pool like ours, but it’s indoors. They keep it open year round, but their equipment is all located outside. To the best of my knowledge, it’s been working fine.
I certainly don’t want to destroy our new heater, so I appreciate the feedback and advice from people who understand the topic more than me.
I’m attaching a few pictures of the pool.
Thanks again for the help!
