Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
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.
Key differences
| Hot Water Recirculation Calculator | Pipe Insulation Thickness Calculator | |
|---|---|---|
| Category | Plumbing | Plumbing |
| Inputs required | 4 | 3 |
| Result | Required Flow Rate (GPM) | Insulation Thickness (inches) |
| What it does | 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. | 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. |