Useful numbers, with the assumptions left on.

Calculators and checkers

Use your own numbers.

1. 01
   AC running cost calculator

   Turn measured electrical power, runtime, and your bill rate into a daily or monthly operating-cost estimate.

2. 02
   AC temperature split guide

   Measure return and supply air correctly, calculate the difference, and understand why the number is not a stand-alone diagnosis.

3. 03
   AC size estimator

   Build a conservative sizing screen and the information needed for a real room-by-room load calculation.

4. 04
   AC age lookup

   Find the data plate and interpret supported manufacturer serial-number formats with confidence labels.

5. 05
   Repair versus replace

   Organize the failed part, system condition, repair durability, comfort history, and replacement scope.

6. 06
   Generator and AC calculator

   Compare the documented running and starting loads of your cooling equipment with a generator’s continuous and surge ratings.

7. 07
   Filter finder

   Turn the dimensions and location you can see into a precise shopping note, without guessing at filtration your system can handle.

8. 08
   Humidity comfort checker

   Interpret indoor temperature and relative humidity together, calculate dew point, and check a measured surface for condensation risk.

9. 09
   Entergy bill explainer

   Separate daily electricity use, effective all-in cost, and changes in usage from changes in the amount billed.

10. 10
    SEER savings comparison

    Compare two efficiency ratings against your own cooling-energy estimate without promising a utility-bill reduction.

11. 11
    Insulation savings scenario

    Translate a transparent low-to-high reduction assumption into a planning range based on your own cooling-cost estimate.

12. 12
    Thermostat cost scenario

    See what a measured or assumed change in cooling use would mean in dollars, without inventing savings per degree.

13. 13
    Home HVAC inspection checklist

    Create a concise list of HVAC records, measurements, and unresolved questions to take into an independent inspection.

14. 14
    AC runtime checker

    Calculate observed duty cycle and record whether indoor temperature is falling, holding, or rising.

15. 15
    Dew point and condensation risk tool

    Calculate indoor dew point and compare it with a measured duct, grille, pipe, wall, or window surface.

16. 16
    Filter check schedule

    Set a condition-based inspection date instead of treating one replacement interval as universal.

17. 17
    How hard is your AC working today?

    Combine observed runtime, indoor trend, and outdoor conditions into a plain record of what the system is doing today.

18. 18
    Should my AC be able to keep up?

    Use a measured indoor trend and runtime pattern to distinguish holding, gaining, and losing ground—without a remote diagnosis.

19. 19
    What is this HVAC part?

    Use location and visible features to narrow a part to a likely category, then capture the label a professional needs.

20. 20
    Home comfort score

    Turn recurring symptoms into an investigation order across safety, moisture, airflow, room load, and operating cost.