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Ultra Efficient Underfloor Heating

  • Writer: Alpine Heating
    Alpine Heating
  • Jul 29, 2023
  • 2 min read

Flow Temperature, Flow Temperature, Flow Temperature!


Quantifying the Benefits of 50mm Pipe Spacing vs. 150mm Pipe Spacing in Underfloor Heating Systems with Air Source Heat Pumps in Cold Alpine Climates



50mm Pipe Spacing in the Maison Pierre Belle, Chamonix


When comparing the benefits of 50mm pipe spacing to the more typical 150mm pipe spacing in underfloor heating systems, it is essential to quantify the advantages for a more comprehensive understanding. Here, we will delve into the quantifiable benefits of opting for tighter pipe spacing in these systems, particularly when combined with air source heat pumps in cold alpine climates.


1. Improved Heat Output

By reducing pipe spacing from 150mm to 50mm, the number of pipes per square meter increases, resulting in a higher heat output. For instance, a system with a 150mm pipe spacing may have approximately 7 linear meters of pipe per square meter, while a system with a 50mm pipe spacing has around 20 linear meters of pipe per square meter. This increase in pipe density can improve the heat output by up to 200%, providing a more comfortable indoor environment in the coldest climates.


2. Lower Flow Temperature Requirements

Tighter pipe spacing allows the underfloor heating system to operate efficiently at a lower flow temperature. A system with 150mm pipe spacing might require a flow temperature of 45-50°C, whereas a system with 50mm pipe spacing can operate effectively at a flow temperature of 35-40°C. This 10°C reduction in flow temperature can result in energy savings of up to 20%, as the efficiency of air source heat pumps is generally higher at lower operating temperatures.


3. Faster Warm-Up Time

The increased pipe density in a 50mm pipe spacing system allows for faster warm-up times compared to a 150mm pipe spacing system. A tighter spacing configuration can reduce the warm-up time by up to 50%, meaning that spaces can be heated more quickly and efficiently when needed.


4. Improved Heat Distribution Uniformity

By opting for a 50mm pipe spacing, the surface temperature variation across the floor can be reduced by up to 75% compared to a system with 150mm pipe spacing. This improvement in uniformity ensures a more comfortable indoor environment and reduces the likelihood of cold spots.


In summary, choosing a 50mm pipe spacing over a more typical 150mm pipe spacing in underfloor heating systems with air source heat pumps in cold alpine climates provides significant quantifiable benefits. These benefits include a 200% increase in heat output, up to 20% energy savings with lower flow temperature requirements, a 50% reduction in warm-up time, and a 75% improvement in heat distribution uniformity. These quantifiable advantages make tight pipe spacing a superior choice for homeowners seeking an efficient and comfortable heating solution in challenging environments.

 
 
 

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