At MasterTherm, innovation and quality have always been at the heart of what we do and now, we’re proud to announce a huge milestone on that journey.

Our full range of R290 heat pumps has officially received the prestigious Heat Pump KEYMARK certification, the gold standard of heat pump performance, quality, and sustainability across Europe.

This is more than just great news for us. It’s a significant moment for the entire renewable heating sector and for homeowners, businesses, and engineers who want the best from their heating systems.

What Is the Heat Pump KEYMARK?

The Heat Pump KEYMARK is a voluntary, independent, third-party certification scheme that demonstrates compliance with European standards for heat pump performance, efficiency, safety, and durability.

Unlike many other certifications, it’s not a requirement. Manufacturers must actively choose to go through the process and it’s a thorough one. Only products that meet the highest technical criteria and undergo rigorous testing are awarded the certification.

In other words:
It’s not given. It’s earned.

By choosing to pursue KEYMARK certification for our R290 heat pumps, we’ve made a clear statement: we don’t just want to meet the standard we want to set it.

Why This Is Such a Big Deal

Let’s break down why this achievement matters not only for MasterTherm, but for the wider industry and for consumers:

1. Independent Assurance of Quality

The KEYMARK offers third-party verification that our heat pumps perform as promised. In an increasingly saturated market, this kind of impartial quality assurance is more important than ever.

2. Stricter Than Most Labels

KEYMARK goes beyond CE marking and other basic compliance labels. It tests for efficiency, seasonal performance, durability under stress, and consistency of manufacturing. That means when you see the KEYMARK, you know the product has passed with distinction.

3. Filters Out Low-Performance Products

Because the process is both voluntary and demanding, it naturally filters out the weaker offerings in the market. This creates more trust and clarity for buyers and encourages higher standards across the board.

4. Positions R290 Heat Pumps at the Forefront

Our use of R290 natural refrigerant already places us at the forefront of climate-conscious heating. Now, with the KEYMARK certification, we’re doubling down on that leadership by combining sustainable technology with certified excellence.

 A Future-Proof Heating Choice

If you’re planning to invest in a heating solution that delivers on efficiency, sustainability, and long-term performance, look for the KEYMARK. It’s fast becoming the symbol of trust in a crowded market.

Our R290 systems don’t just meet modern heating demands, they anticipate the future. With ultra-low global warming potential, high temperature outputs, and outstanding energy efficiency, R290 heat pumps are the smart choice for homes, hotels, leisure centres, and large-scale commercial applications alike.

Setting a New Benchmark for the Industry

At MasterTherm, we believe in leading by example. This certification validates the efforts of our design and engineering teams, but more importantly, it raises the bar for everyone else in the industry.

Our hope is that KEYMARK becomes a new baseline, a standard that other manufacturers strive for, not just for prestige, but to ensure a better, more transparent, and more sustainable market for all.

Final Thoughts: Let’s Redefine What Quality Looks Like

“This isn’t just about ticking boxes. It’s about taking responsibility for the technology we offer and making sure it lives up to what today’s world needs: clean energy, consistent performance, and long-term reliability.”
MasterTherm Team

If you’re choosing a heating system for your home or business, make sure it’s a future-proof one.

Look for the KEYMARK. It speaks volumes.

And if you’re as passionate about raising industry standards as we are, share this with your network and help spread the benchmark.

 Let’s drive positive change, one certified heat pump at a time.

keymark signet