Blog

HVAC Talk of the Week: Sizing Production Units

Join our Energy Engineer Ruben as he delves into the captivating world of HVAC engineering, and discusses why it's important correctly size your production units.

How can you determine the optimal size of your production units in your hydronic system? Designing your production units is highly dependent on the scope of your project, but how can you ensure that the design will be optimal?

Let’s take the example of a boiler feeding a heating circuit with a thermal design power of 100kW. We now want to reduce our carbon emissions by implementing a heat pump. However, heat pumps are expensive, so in order to find a trade off between our investment costs and our carbon reductions, we therefore impose that our heat pump contributes to 70% of our total heat load.

Now, how can we define the size or our heat pump? Simply taking 70% of the total power design will be an overestimation. This is because our heating circuits will only rarely operate in full load conditions. Therefore, we can decrease the size of our heat pump. But how much? With current practices, we only can make an estimation based on rules of thumb. However, the actual contribution of our heat pump is something we can only find out once the system is built.

Tune in to watch the video now, and discover how the Hysopt software can solve this issue while assisting you in your engineering process.

READ ALSO

The State of HVAC 2026

Discover the 6 key HVAC trends for 2026 in this e-book packed with data-driven insights and actions to help you stay ahead in the changing market.

Download your copy today and see what no HVAC engineer can afford to ignore in 2026.

the state of hvac 2026 hysopt ebook

Explore more

hvac performance gap buildings
Blog

Closing the HVAC Performance Gap: Why It Matters More Than Ever

Many HVAC systems underperform compared to their design specs. In this blog, we explore how closing the performance gap helps you deliver on efficiency promises, reduce waste, and build long-term value across your portfolio.
net zero building codes hvac
Blog

Net-Zero HVAC in 2026 Building Codes: What You Need to Know

Net-zero is no longer a future goal—it’s the new baseline. As 2026 building regulations take effect across the UK and EU, the pressure is on to ensure HVAC systems don’t just meet minimum efficiency thresholds but actively contribute to decarbonisation strategies. For engineers, contractors and portfolio owners, that shift is more than technical. It changes how systems are designed, commissioned, and justified from the very first sketch.
hysopt sensitivity analysis
Blog

How Sensitivity Analysis Improves Hydronic Efficiency

Even small variations in flow and diameter choices can create long-term inefficiencies in hydronic HVAC systems. Sensitivity analysis allows engineers to test, refine, and confidently select the most efficient system configuration—reducing energy use and cost without compromising comfort.