“Conscious purchase” heat pumps: how to choose the right model in the mid-seasons (June guide)

If you are evaluating a heat pump in June, you are in the best moment: you are not under stress from a “heat emergency”, you can compare models calmly and set up the system so that it works well both when it cools down in the evening and when the sultry heat arrives.

This guide is designed to help you understand what to buy (and what to ask the installer) while avoiding the most common mistakes. If you want to see the available options right away, you can start from the category:
StorePST Heat Pumps: https://storepst.com/gb/70-heat-pumps

Step 1 — Start from the system: what do you have at home (or what will you install)?

Before looking at prices and kW, clarify this point: what terminals do you have?

• Radiators
• Underfloor radiant heating
• Fan coils
• Mixed system

It is important because it changes the way the house “absorbs” and distributes heat/coolness, and therefore changes the most sensible choice of the system.

Practical tip: if you are not sure, ask the installer.

Step 2 — Choose the configuration: monobloc or split

In the heat pump section on StorePST you will find models in different configurations. From a “conscious purchase” perspective, the point is not which one is “best” in absolute terms, but which one best suits your case (spaces, system layout, installation constraints).

• Want to directly explore monobloc heat pumps: https://storepst.com/gb/81-monoblock-units
• Want to explore split heat pumps: https://storepst.com/gb/80-split-units

Step 3 — The most important question: how many kW do you really need?

In the StorePST category you will find models with different power capacities (e.g., 5–8–12 kW and beyond). The temptation is to choose “a bit more powerful just to be safe,” but it is not always a good idea.

• Oversizing can lead to less smooth operation and often more dispersion/waste in real management.
• Undersizing can create problems during peak times (insufficient comfort).

Conscious purchase = conscious sizing.

If you do not have a thermal calculation, at least get from the installer (even indicatively):

• sqm and average height
• insulation quality (poor/medium/good)
• zone/climate
• goal: heating only or cooling as well

Step 4 — Single-phase or three-phase: check the electrical system first

In the category, there are single-phase and three-phase variants available (depending on model and power). This is a point that many discover too late, when they have already chosen.

Before purchasing, check:

• what power supply you have available (or if you can adapt it)
• what the installer recommends based on the required power

Step 5 — Do you also want DHW (domestic hot water)?

If you want a “central” system (not just room comfort), evaluate whether you also need DHW management. This influences:

• choice of model/solution
• necessary components
• priority logic (DHW vs. comfort)

The most common mistakes (the ones that cost money)

• Choosing kW based only on square meters
• Ignoring single-phase/three-phase and realizing it afterwards
• Buying “the most powerful model” just to be safe
• Not clarifying DHW immediately: is it needed or not?
• Neglecting regulation (thermostats/control units/zone management) and focusing only on the machine

Where to see the available models

To compare prices, brands, and available models go here:
https://storepst.com/gb/70-heat-pumps

FAQ

Is monobloc or split better?
It depends on the system and installation. The best choice is the one consistent with technical constraints and the installer’s project.

Does it make sense to buy in June?
Yes: you choose calmly and arrive prepared for summer peaks and transitional months, without rushed decisions.

Can I choose the power by looking only at the square meters?
Better not to: insulation, climate zone, terminals, and habits have a significant impact and make it easy to make a mistake.

Conclusion

A conscious purchase of a heat pump is decided with 5 pieces of information: system, configuration (monobloc/split), kW, electrical supply, DHW yes/no.

With this data in hand, choosing among the models in the catalog becomes simple and you reduce the risk of buying “the wrong one”.

Go to the StorePST category and compare the available solutions:
https://storepst.com/gb/70-heat-pumps