Lack of return air is a very common problem for those systems that were either poorly designed or originally planned for heat only applications. Adding additional returns to your system allows for greater supply air into your home, resulting in better airflow and comfort for your family. The benefits you will receive by taking care of this problem include: quieter operation, better airflow, fewer repairs, longer life of your equipment, lower utility bills and, best of all, greater comfort.
A programmable thermostat is designed for people with fixed schedules that take them in and out of the home. With it, you can program the temperature to "set-back" when you are not at home. This feature keeps you comfortable when you're home and saves you money when you're not by reducing the energy needs to heat and cool your home.
Programable thermostats are available in what are called 5+2 day configurations and 7-day configurations. The difference is flexibility. A 5+2 day configuration allows you to set Monday-Friday as a group setting with up to four different time settings. This configuration also allows you to set Saturday and Sunday as a separate group with up to four different time settings per day. The 7-day configuration thermostat allows you to program each day differently with up to four different time settings per day.