For the temperature profiles, the More Info gives the slope and the x-intercept. It would be more useful to see the y-intercept. That is the temperature for which the system can no longer keep up based on the trendlines from the data.

The â€śMore Infoâ€ť gives you two values for each trendline: slope `x`

and y-intercept `b`

.

Using the line equation `y = mx + b`

, you now have only `x`

and `y`

remaining. To find the outdoor temperature `x`

where the system can no longer keep up with demand, simply set `y`

to 0 and solve the equation `(y - b) / m = x`

.

I understand that, but would be nice to have the value displayed outright. Iâ€™ve done the calculation and got the answer I was expecting. Itâ€™s just a more useful value to show than the one currently displayed.

Fair enough! I modified the post title as that would technically be the â€śx-interceptâ€ť. I can certainly look into adding it.

You are correct that is the x-intercept. Thanks for looking into adding that.

When I got my new HVAC this year, I was curious as to where the trendline crossed the x-axis and watched it change as it acquired more data. I only recently discovered the More Info option, but had to do the calculation to get the number I wanted.

Thanks

Ooooo, Algebra. I thought thereâ€™d never be any use for it. Just kidding. I hadnâ€™t really thought about the use for that until now. Thanks for providing the data. Iâ€™m good from -105 to 106!