Winter Reefs: Do you lower your temps?

[Delphinus]

I seem to have accidental seasonal temperature fluctuations..

I try to run my tank at a steady 26. In the summer if the household A/C is doing its thing then the tank is rock steady at 26, but if it's not warm enough for the A/C to be going much then the tank can warm up. It's ironic but if it's say 21 degrees outside my tank will get warmer than if it's 30 degrees outside. If the tank gets to 28 I I start turning tank lights off.

Lately I've been finding my tank at 25 and this is probably due to the HRV being set too high, I probably need to make some adjustments again. Either turn it down or lower the dehumidistat setting.. With the lights on it gets back to 26 during the day.

So winter for me seems to be 25-26 and summer seems to be 26-28.