Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Plumbing
Pipe Insulation Thickness Calculator
Estimates the required insulation thickness for a pipe based on its diameter, the temperature difference between the pipe and surroundings, and whether the pipe is indoors, outdoors, or in a crawl space. Use it when sizing insulation for plumbing or HVAC pipework.
Fill in the required fields to see your result.
Plumbing
Hot Water Recirculation Calculator
Estimate the heat loss in a hot water recirculation system based on pipe length, diameter, insulation quality, and acceptable temperature drop. Use this when designing or auditing a recirculation loop to minimize wait time and energy waste.
Fill in the required fields to see your result.
Key differences
| Pipe Insulation Thickness Calculator | Hot Water Recirculation Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 3 | 4 |
| Result | Insulation Thickness (inches) | Required Flow Rate (GPM) |
| What it does | Estimates the required insulation thickness for a pipe based on its diameter, the temperature difference between the pipe and surroundings, and whether the pipe is indoors, outdoors, or in a crawl space. Use it when sizing insulation for plumbing or HVAC pipework. | Estimate the heat loss in a hot water recirculation system based on pipe length, diameter, insulation quality, and acceptable temperature drop. Use this when designing or auditing a recirculation loop to minimize wait time and energy waste. |