Interactive Pump Room Calculator

The Anatomy of a Fully-Equipped Pump Room

Select points of interest below to learn more about the anatomy of a fully-equipped pump room.

Engine Selection
Engine Selection

NFPA20 11.2.2.7 “…Engines shall have a 4 hour minimum horsepower rating equal to or greater than the brake horsepower required to drive the pump at its rated speed under any conditions listed for environmental conditions under pump load.”

Verify your Engine Selection Here
Exhaust Backpressure
Exhaust Backpressure

NFPA20 11.5.2.1 Each engine will have an independent exhaust system.

Verify your Exhaust Backpressure Here
Pump Room Ventilation
Pump Room Ventilation

A proper inlet louver and ventilating system must “Limit the temperature for the pump room at 49C (120F) at the air cleaner inlet with the engine running at rated load” (11.3.2.1.1) , “Supply adequate air for engine combustion (11.3.2.1.2), and “remove hazardous vapors” (11.3.2.1.3).

Verify an Engine’s CFM Requirements Here
Cooling Loop
Cooling Loop

FM 1333 3.6.1 “Liquid cooling systems shall be equipped with a raw water supply loop for control of raw water flow to all cooling devices.” FM 1333 4.36.1 “Raw water supply loops shall be capable of providing the required flow to the engine cooling devices with straining devices restricted by 50 percent, a minimum inlet pressure, and the pressure regulators set for the maximum inlet pressure of the cooling devices.”

Verify Proper Cooling Loop Sizing
Diesel Fuel Line
Diesel Fuel Line

NFPA 20 11.4.1.3.1 “Fuel supply tank(s) shall have a capacity at least equal to 1 gallon per hp (5.07L per KW), plus 5% for expansion and 5% volume for sump.”

Verify Fuel Line Size and Distance Here
PLD/SPLD
PLD/SPLD

NFPA20 11.2.4.3 “Variable speed pressure limiting control or variable speed suction limiting control systems used on diesel engines for fire pump drive shall be listed for fire pump service and be capable of limiting the pump output total rated head (pressure) or suction pressure by reducing pump speed.”

Verify your PLD Engine Here Verify your SPLD Engine Here
Water Temperature Rise
Water Temperature Rise

NFPA20 11.2.8.5.2 “ The cooling water flow required shall be set based on the maximum ambient cooling water”.

Verify the Calculated Outlet Temperature Here