0.75 kw/hr makes no sense, except as a rate of expansion of electric

utility capacity.

1 kWh = 3412 BTU

1 hp = 746 W = 0.746 kW

At 1 hp for 1 hour, the BTU equivalent is

0.746 kW * 1 hr * 3412 BTU / kWh = 2545 BTU.

At 230 V, 7.5 A, power is 1.725 kW.

for 1 hour, this is 5886 BTU.

The differences are accounted for by whether the figures are ratings

or figures about actual operation, and efficiency - shaft power

delivered vs. total power consumed. I'm not sure what you mean by

"given off". Is this a heat loss figure?

I certainly would have guessed that the OP was looking to calculate

heating; BTUs are seldom used to measure anything else, and, as you

say, the term "given off" is evocative...

Maybe the OP was looking to size air conditioner for pump shed?

WAG would be that motor on this rig runs ~ 85% efficient under load.

Pump probably wastes another 10-20% of power in fluid flow viscous

losses, but, that heat load will be carried out to the swimming pool

in the water flow. Leaves (VERY roughly) either 380 or 880 BTU/hr,

give or take, as heat dissipated by motor, depending on whether 1 hp

or 1.725 KW is the motor's true power rating.

W Letendre