I would also appreciate a card like that 
Unfortunately, I haven’t found anything, that even goes in that direction. 
I’m expirementing with Plotly card, but haven’t come to a good solution yet.
I’m needing this mostly for the hot summer months, so I’ll see, what I can come up with this summer season. I’ll tag you, if I find something useful! 
Closest to it, I’ve ever seen, was this: Simple Air Comfort card
But what I need, is more precise, more close to a real Mollier diagram, so I can use it for tuning HVAC in industrial environment Or more precise, just to show the nitpickers, that I’m within specs and they should leave my office 
I will be happy with your tag, very happy 
@paddy0174 @BebeMischa Hope I’m not too late.
Plotly Code
type: custom:plotly-graph
raw_plotly_config: true
layout:
title:
text: Behaglichkeitsfeld
subtitle:
text: Raumluftfeuchte - Raumtemperatur
xaxis:
range: [12, 28]
dtick: 2
title: Raumlufttemperatur [°C] →
yaxis:
range: [0, 100]
dtick: 10
title: Relative Feuchte [% ] →
shapes:
- type: path
xref: x
yref: y
path: 'M 17, 85 L 21.5,80 L 25,60 L 27,30 L25.5,18 L20,20 L17,40 L16,75 Z'
fillcolor: rgb(203, 206, 44)
line:
color: transparent
layer: below
label:
text: noch behaglich
textposition: "bottom center"
padding: 10
xanchor: left
yanchor: bottom
- type: path
xref: x
yref: y
path: 'M 17.5, 74 L 22.5,65 L 24,35 L 19, 38 Z'
fillcolor: lime
line:
color: transparent
layer: below
label:
text: behaglich
- type: circle
fillcolor: green
opacity: 0.5
line:
color: transparent
layer: below
x0: 20
x1: 23
y0: 40
y1: 60
annotations:
- x: 24
y: 85
text: "zu feucht (schwül)"
showarrow: false
- x: 15
y: 22
text: "zu trocken"
showarrow: false
- x: 20
y: 50
text: "Cold"
showarrow: false
xanchor: right
- x: 23
y: 50
text: "Too warm"
anchor: "left center"
xanchor: left
showarrow: false
- x: 21.5
y: 60
text: "Wet"
showarrow: false
xanchor: center
yanchor: bottom
- x: 21.5
y: 40
text: "Dry"
showarrow: false
xanchor: center
yanchor: top
entities:
- entity: sensor.wohnzimmer_temperature
name: Temperatur
internal: true
period: auto
fn: $fn ({ ys, vars }) => vars.temperature = [ys[0]]
- entity: sensor.wohnzimmer_humidity
name: Luftfeuchtigkeit
internal: true
period: auto
fn: $fn ({ ys, vars }) => vars.humidity = [ys[0]]
- entity: ""
x: $fn ({ vars }) => vars.temperature
"y": $fn ({ vars }) => vars.humidity
mode: markers
name: points
marker:
color: rgb(255,255,0)
size: 10
type: scatter
refresh_interval: 10
@BebeMischa For certain you can draw a mollier diagram using plotly.