---
title: Minimum and Maximum Flow Temperatures in Homely
description: This article explains how to correctly define the maximum and minimum flow temperatures for your heat pump system within Homely. It covers what these temperatures represent (and what they don’t), where to find them, and how they impact system validation.
---
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# Minimum and Maximum Flow Temperatures in Homely
#### **☝️What is the Maximum flow temperature?**
**Answer:**
Max. flow temperature = **Maximum safe flow temperature for the emitters.**
If an emitter requires the temperature to stay below a specified limit, then you need to provide that temperature here. Otherwise, use the maximum capable output for the heat pump found in the manual, or enter a very high number, and the validations will tell you the limits.
**Example:** Underfloor emitter with a screed flooring with a specified maximum safe temperature of 35°c. We’ll provide a validation saying it needs to be below 45°c (based on the emitter & heat pump), and you will need to answer with 35°c.
**What it isn’t:**
- It is **not the design temperatures** of the system
- It is not the desired indoor temperature
#### 👇What is the minimum flow temperature?
**Answer:**
Min. flow temperature = **Minimum capable flow temperature for the emitters.**
To find the minimum capable flow temperatures for the emitters, you can find them in the installation manual for the heat pump.
**What it isn’t:**
- It is **not the design temperatures** of the system
- It is not the desired indoor temperature
#### 🚨 IMPORTANT🚨
1. The flow **temperatures set in the controller for the heat pump might conflict** with our ability to reach the min & max temperatures provided. For instance, if you have told us the maximum is 65°c but the heat pump controller is set to 60°c, we won’t be able to reach 65°c as the controller is preventing us. **Check the flow temperatures set on the heat pump don’t prevent Homely from reaching temperature.**
2. **Homely limits temperature ranges** based on the heat pump make, model and emitter. if you can’t select the desired temperature ranges, please ensure you’ve provided the correct information in previous questions.
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