The Indoors

"The Indoors" is our knowledge and inspiration center for both end users and professionals. Here you will find news, blog posts and articles from Purmo providing you inspiration and knowledge about different heating and cooling systems. You will also find inspiration for stylish and energy-efficient solutions for a sustainable indoor climate in your project or your home.

The categories include sizing of products and energy efficiency, product news, references, renovation and some of our main product groups such as radiators, underfloor heating and towel rails. Under Insights you will find interesting articles and studies about heating, cooling and ventilation.

Retrofit vs. replace: choosing the best energy-efficient HVAC solutions

To make the decision between retrofit and replacement easier, we’ll explore the key considerations as well as the advantages and challenges of each approach.

5 essential steps for implementing low-temperature heating in renovations

Low-temperature heating is becoming increasingly popular in renovations. Implementing it in existing buildings, however, presents a few unique challenges that HVAC professionals must navigate carefully.

2 heat pump systems compared: evaluating costs and efficiency when switching to low-temperature radiators

In this article we’ll compare the cost and efficiency of two heat pump systems and look at what happens when the old radiators are replaced by new low-temperature radiators.

Underfloor heating maintenance: a step-by-step guide to flushing the system

In this article we’ll discuss the significance of underfloor heating maintenance and take you through the underfloor heating flushing process step by step.

Retrofitting existing buildings with electric heating: key considerations for installers

There are various factors to consider when retrofitting existing buildings with electric heating, so let’s explore the key considerations for HVAC professionals navigating this type of project.

5 stylish electric radiator designs to complement a home renovation

In this article we’ll focus on 5 stylish electric radiator designs that can help you to elevate any home renovation while ensuring efficient, reliable warmth.

Harmonizing heat: a guide to combining underfloor heating and radiators

In this guide, we’ll take a closer look at how to design, install, and maintain systems that combine underfloor heating and radiators in new and renovated buildings.

HVAC trends in 2025: staying ahead in a transforming industry

In this article, we’ll explore the top HVAC trends shaping the industry in 2025 and provide insights on how professionals can adapt to stay competitive in this dynamic landscape.

Understanding magnetite in hydronic heating systems: 5 FAQs answered

Although magnetite is not a new phenomenon, we find that our customers still often have questions about it. We are therefore happy to dive into the subject and answer 5 of the most frequently asked questions about magnetite in hydronic heating systems.

The future of home heating: exploring energy efficiency in electric radiators

For professionals in the field, understanding the advantages and potential of energy-efficient electric radiators is essential to staying competitive and addressing client needs.

Proud to rank in the Excellence class of the 2024 ESG Transparency Award

We are very proud to see our commitment be acknowledged and awarded with a place in the top Excellence class of the ESG Transparency Award 2024.

Understanding the data requirements for underfloor heating design and calculation

A well-designed underfloor heating system can contribute significantly to the creation of sustainable indoor climate comfort, provided it’s carefully planned first.

Making a difference together: voluntary work in 2024

As a team we want to actively contribute to create a positive impact. As a result, this year too, some great volunteering projects were set up of which we are happy to provide an overview.