Reading Ruud Model Numbers Generator
Prestons will give you good data on units prior to 2005. Worth the cost if you work in the replacement market. I wouldn't worry as much about replacement windows changing the loads as I would the potential to improve performance by fixing the duct system. Correct sizing, correct construction, and sealing. If you are investing 6-15K for a new HVAC unit - another 1-3K for an effective distribution system is very reasonable. It will do more for comfort than a round of replacement windows that cost more.
Ruud Model Number Search
When ordering a replacement part, be sure to read all notes and symbol notations on the parts list. In some cases, it is necessary to determine the unit style number and/or serial number in addition to the model number before selecting a replacement part. When ordering painted cabinet parts, the order must specify unit model number. Information in the model number. It is commonly found in the first three digits – sometimes and Btus, sometimes as tons. Example: SPCC-B504-A = 5.0 ton, Or TWS748A = 48,000 Btu = 4 ton Age: Through the seventies date of manufacture information is found as a number and a letter in the serial number where the number is the.