I use these but I really do not know how much they actually heat the water as I have solar panels on the roof. I don't think that I could get my pool water warmer than the ambient temperature at the end of a day just using the rings though but I don't really know. Our pool faces west and we get a lot of sunshine too. My main reason to use them is to help prevent heat lost at night.smuggs said:so, my question is for those of you who have experience with them, is do you end up with pool water that is warmer than the ambient temperture? If so, by about how much?
Lately, I have been seeing a 2-3 degree drop at night with the rings on but it depends on the water temperature during the day. When we had a heat spell a couple of weeks ago, I had 84-85 degree water but lost 5-6 degrees over night without the cover. The nights were probably in the upper 50's or low 60's. This last weekend with 84 degree water and with the cover on, I managed a 3 degree loss. The last couple of days, it's been much cooler during the day. I started at 81 and in the morning, it was 79. The next morning, it was at 77. We haven't had too much sun the last couple of days so the solar hasn't kicked on.smuggs said:RonI - good point on reducing the nightly temperature loss....that's what I really intended to focus my question on, but I must not have been awake enough after a long night with 2 kids not sleeping (6 yrs / 6 mths). In any event, what has been your experience on nightly temperature loss while using the rings vs. not using them? I currently seem to lose 2-3 degrees/night (high during day around 75-78; low at night 55; water temp 73 peak/70 low)