Sync dev to main: TEMP-1B recirculation example

docs/products/temp1/examples/hot-water-recirculation.md

@@ -67,7 +67,7 @@ flowchart LR
 
 For this to react quickly, the probe needs to report faster than its 60 second default. Donovan reports it every 3 seconds and keeps a 60 second heartbeat, so Home Assistant reacts fast while you can still tell at a glance that the probe is alive. Two guards keep the data clean: the `85.0` reading a DS18B20 sends at power-on is dropped, and readings are ignored when the **Select Probe** option is set to `Food`.
 
-For the full walkthrough of overriding probe YAML in the ESPHome Builder, including the simpler delta-plus-heartbeat pattern, see [How To Change The Temperature Probe Update Interval](../setup/temp1-change-temp-probe-update-interval.md).
+For the full walkthrough of overriding probe YAML in the ESPHome Builder, including the simpler delta-plus-heartbeat pattern, see [How To Change The Temperature Probe Update Interval](/products/temp1/setup/temp1-change-temp-probe-update-interval.md).
 
 ```yaml
 sensor:

docs/products/temp1b/examples/hot-water-recirculation.md

@@ -0,0 +1,11 @@
+---
+title: Hot Water Recirculation with TEMP-1
+description: How a community member uses an Apollo TEMP-1 to drive a hot water recirculation loop, blending an instant mini tank with the main house heater and wasting no water down the drain.
+---
+# Hot Water Recirculation with TEMP-1
+
+!!! warning "Running this on a TEMP-1B"
+
+    This loop needs the probe reporting every few seconds, so it has to stay powered. Run your TEMP-1B on USB power with **Prevent Sleep** turned on, or use a mains-powered TEMP-1. On battery with deep sleep, it can't react fast enough to switch the valve in time.
+
+--8<-- "products/temp1/examples/hot-water-recirculation.md:7:"

mkdocs.yml

@@ -398,6 +398,7 @@ nav:
                 - Alert Outside Range: products/temp1b/examples/temp1b-alert-example.md
                 - Use Cases: products/temp1b/examples/use-cases.md
                 - Automations: products/temp1b/examples/temp1b-automation-examples.md
+                - Hot Water Recirculation: products/temp1b/examples/hot-water-recirculation.md
               - Troubleshooting:
                 - TEMP-1B Boot Mode: products/temp1b/troubleshooting/temp1b-boot-mode.md
                 - Factory Re-Flash TEMP-1B: products/temp1b/troubleshooting/temp1b-code.md