Electrical Heat Trace - Different rate wattage on same circuit

[MrJLH]

Came across this yesterday on electrical heat trace:

Can for example 8W/ft electrical heat trace say 30 feet, be wired through conductors and conduit to say 5W/ft electrical heat trace on the same circuit?
Thanks

 

[drcampbell]

As long as they're designed for the same voltage, sure. Same as putting an 8-watt lightbulb on the same circuit as a 5-watt lightbulb.
But I'm compelled to ask, "Why?". Why are two different power densities installed in the same environment? Seems like the thermal engineering needs to be reviewed.

 

[MrJLH]

As long as they're designed for the same voltage, sure. Same as putting an 8-watt lightbulb on the same circuit as a 5-watt lightbulb.
But I'm compelled to ask, "Why?". Why are two different power densities installed in the same environment? Seems like the thermal engineering needs to be reviewed.

What happened a drain line for a hydrocarbon condenser was designed using 8W/ft, and the actual condenser came pre-traced from the vendor with 5W/ft. Seems logical in my head, but wanted some thoughts.

Thanks