Having bought a 50 yr old ranch 18 months ago, we are still getting settled in. This will be our second winter and have beefed up the attic insulation since our arrival.

2 60 foot trees have been removed from the front of our fully south facing 10 foot wide picture window. I fully expect to have warmer days now, but can I create some kind of a heat sink to carry over into the long evenings.

Any ideas?? Thanks to all.