I have an impressive collection of very old books. Some of these editions are significantly rare and worth quite a bit of money. I have spent the past twenty years searching book stores, flea markets, estate sales and antique stores for books. I occasionally purchase volumes simply because the leather bindings and parchment pages appeal to me. I take unquestionably great care of our collection, and never handle them without wearing gloves. The oils from your fingertips could cause irreparable damage, believe it or not. I am particularly conscientious about temperature and humidity control. Excess moisture could lead to mold and mildew, while insufficient humidity might cause the pages and bindings to crack and crumble. I have invested into an up-to-date heating and cooling system with zone control. This allows me to target and control the conditions in the room that houses our collection. Along with the heating and cooling system, I’ve installed both a humidifier and dehumidifier. In the Wintertime, with the furnace running, the air tends to become overly dry. The humidifier introduces necessary moisture and gives me the capability to determine relative humidity. In the summertime, the a/c handles the heat, while the dehumidifier takes care of excess moisture. The dehumidifier combats the sticky feeling as well as the growth of harmful bacteria. Although the changes to our Heating and Air Conditioning and air quality were high-priced, our home is more comfortable and much healthier. Plus, the humidifier and dehumidifier promote more conservative temperature control settings, and I spend less on our energy bills. I am thankful that the integrity of our rare book collection is protected.