The Strebel S-ASX Air Source Heat Pump range (ASHP) provides innovative heating and cooling solutions as well as Domestic Hot Water supply. Designed for commercial and non-domestic buildings applications, our Air Source Heat Pumps harness the energy held within the outside air — an inexhaustible renewable energy source — to provide low-carbon, cost-effective building temperature control.

Key Features of Strebel Air Source Heat Pump

Wide Range: A diverse range of power and temperature output models offering engineers a choice for different building challenges.

Low Emissions: Independently tested and listed on the Energy Networks Database (ENA) for compliance with electrical emissions.

Quiet Operation: Innovatively designed to operate with minimal noise, enhancing the comfort of your business environment.

High Durability: Built to withstand the test of time, ensuring reliability and continuous performance.

Low Operating Costs: Cutting-edge technology ensures superior Coefficient of Performance (COP) and Seasonal Coefficient of Performance (SCOP), optimising energy use across the seasons and reducing energy bills and electricity consumption.

Eco-Friendly: Using a range of refrigerant from R410A, R454B as well as R290 natural refrigerant, known for its low environmental impact and excellent thermodynamic performance.

Compact Design: Designed to reduce spacing between each unit to offer versatility and space-saving installation.

The Benefits of Strebel Air Source Heat Pumps

  • Comfort and Control: Enjoy consistent temperatures and customisable comfort settings, ensuring an optimal indoor climate year-round.

  • Low Maintenance: Designed for durability and ease of use, our commercial air source heat pump requires minimal maintenance, saving you time and additional costs.
  • Running Cost Savings: Our ASHP’s superior efficiency compares favourably to most other manufacturers offering up significant savings over the lifespan of the system.

  • Environmental Impact: By utilising a clean, renewable source of energy, businesses can significantly reduce their carbon footprint, contributing to a healthier planet.

Which Air Source Heat Pump to Choose?

It can be confusing when trying to select the correct machine with a wide range of different models on offer. The simple fact is that many commercial air source Heat Pump systems will do a similar job – so which one to choose?

Fundamentally it’s important to ask yourself a few basic questions at the outset. The answers to these questions will often lead towards a model selection.

Our range of TSE and TS Buffer Vessels are also available to match thermal storage requirements for smooth operation and defrost mode heat supply.

FAQs about Air Source Heat Pumps

What maximum flow temperature do I need?

This will often depend on whether the installation is a retrofit project, sometimes replacing or complimenting existing boiler plant, or a new build. Retrofits will frequently require the Air Source Heat Pumps to operate with relatively high flow temperatures, whereas new installations will be designed from the ground up with lower temperatures. It’s also essential to consider system heat losses and whether there is a Domestic Hot Water requirement.

What kW power output do I need?

The power output of Air Source Heat Pumps varies with changes in air temperature. Strebel machines, like many others, are sized to a nominal power output which is measured at 7°C ambient air temperature. This is reasonable considering the average temperature for the UK was 10°C according to the Met Office in 2022. However, always make sure the selected unit has the required kW output at the design air temperature. At the same time also consider the number of units for resilience and load sharing.

How do I minimise running costs?

After the initial installation costs, achieving the best operational efficiency of the heat pump is critical as this will reduce annual electricity costs. Selecting the model with the highest SCOP at the required output and flow temperature is a good starting point.

What about the Refrigerant?

Keep in mind that refrigerants have different compositions with different thermal conductivity characteristics. Be sure to check the GWP of your refrigerant as this will impact on the embodied carbon (TM65) value of the selected machine. Note that the machines with the lowest GWP don’t necessarily have the highest SCOP efficiencies. Accordingly, product selection will often require a balanced judgement between various characteristics and performance criteria.

Why Choose Strebel?

We recognise that Building Services engineers have a choice which heating system to use. There are many options and considerations to ponder when making these choices. So why choose Strebel over other manufacturers?

Well, one reason is that we are 100% orientated only on commercial and non-domestic installations so we aren’t distracted by a domestic range of products or considerations.

Another reason is that we always design with energy efficiency and carbon reduction in mind. We don’t simply just offer the cheapest solution. We recognise this isn’t for everyone. It is what we do though. We’ve been doing this for fifty years now, working with contractors, consultants and end-users in the UK. All our products and services are designed to offer quality and performance.

We’re honest and straightforward. If we can’t help we will just say so. If we can, then we’ll offer what we think is the best option. Simple as that.

Ready to transform your commercial settings with energy efficient, eco-friendly heating and cooling?

Contact our sales team today for a personalised quote or download our detailed brochure. Embrace sustainability and efficiency with Strebel’s Air Source Heat Pumps.

Or give us a ring on 01276 685422