💧 Continuous DHW Recirculation (3-8 GPM), Copper Pipe Heat Loss & 10-Sec Wait

DHW Recirculation Loop & Pump Calculator

Size domestic hot water return recirculation piping networks under ASHRAE & IPC (ensuring maximum 10-second wait times at furthest plumbing fixtures): calculate insulated copper pipe thermal heat loss (BTU/hr per linear foot), required circulating pump flow (GPM based on 10°F-15°F drop), balancing valves, and plumbing profits.

1. Project & Operating Inputs

Total Hot Water Supply & Return Pipe Length (Linear Feet e.g. 1,800 ft)

Allowable Temperature Drop in Loop (ΔT °F e.g. 10.0°F Drop)

Customer Invoiced Bid Price for Piped Recirculation System ($)

Bronze Circulator Pump, Thermostatic Balancing Valves, Insulation ($)

2. Financial Breakdown & Yield

DHW RECIRCULATION LOOP SIZING

Turnkey Recirculation Package Profit

Plumbing Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost