## Factors influencing the choice of pre-insulated pipe systems for heat networks

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#### * 1. What are the most important factors when choosing a pre-insulated pipe system for use in heat networks?

 1 (not important) 2 3 4 5 (very important) Temperature range Temperature range 1 (not important) Temperature range 2 Temperature range 3 Temperature range 4 Temperature range 5 (very important) Pressure range Pressure range 1 (not important) Pressure range 2 Pressure range 3 Pressure range 4 Pressure range 5 (very important) Insulation performance (i.e. heat loss) Insulation performance (i.e. heat loss) 1 (not important) Insulation performance (i.e. heat loss) 2 Insulation performance (i.e. heat loss) 3 Insulation performance (i.e. heat loss) 4 Insulation performance (i.e. heat loss) 5 (very important) System reliability System reliability 1 (not important) System reliability 2 System reliability 3 System reliability 4 System reliability 5 (very important) Ease of installation Ease of installation 1 (not important) Ease of installation 2 Ease of installation 3 Ease of installation 4 Ease of installation 5 (very important) Cost of installation (CapEx) Cost of installation (CapEx) 1 (not important) Cost of installation (CapEx) 2 Cost of installation (CapEx) 3 Cost of installation (CapEx) 4 Cost of installation (CapEx) 5 (very important) Running costs (OpEx) Running costs (OpEx) 1 (not important) Running costs (OpEx) 2 Running costs (OpEx) 3 Running costs (OpEx) 4 Running costs (OpEx) 5 (very important) System life expectancy System life expectancy 1 (not important) System life expectancy 2 System life expectancy 3 System life expectancy 4 System life expectancy 5 (very important)

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#### * 2. What is your typical maximum flow temperature (degrees Celsius)

 50°C 90°C 130°C
i We adjusted the number you entered based on the slider’s scale.

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#### * 3. What is your typical maximum system pressure (bar)

 1 bar 10 bar 20 bar
i We adjusted the number you entered based on the slider’s scale.

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#### * 4. Typically, what is the largest diameter of service pipe you need in mm (approx)?

 20 600 1,200
i We adjusted the number you entered based on the slider’s scale.

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#### * 5. What is your typical system minimum design life (years)?

 5 years (or less) 25 years 50 years
i We adjusted the number you entered based on the slider’s scale.

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#### * 8. Are there any other questions we should be asking?

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