- Joined
- Jul 16, 2009
- Messages
- 3,253
- Reaction score
- 4,909
Hello - Considering replacing a reeflo dart with a DC return pump.
The reeflo draws ~150 watts and the only heat that imparts into the water is via heat conducted through the shaft/bearing (from the motor) and friction. Thus, virtually no heat from the motor is transferred and instead is shed to the room.
DC pumps - even run externally, are water cooled, as the water floods the impeller and magnet housing.
Looking at the flow curves for the large VarioS and RD 3 pumps at moderate head heights, they are in the same efficiency ballpark. My question to owners of the ~150 watt VarioS/RD/Jeabo pumps is - what is the external operating temperature (when run externally)?
I don't have much wiggle room for heating of the water by a pump.
The reeflo draws ~150 watts and the only heat that imparts into the water is via heat conducted through the shaft/bearing (from the motor) and friction. Thus, virtually no heat from the motor is transferred and instead is shed to the room.
DC pumps - even run externally, are water cooled, as the water floods the impeller and magnet housing.
Looking at the flow curves for the large VarioS and RD 3 pumps at moderate head heights, they are in the same efficiency ballpark. My question to owners of the ~150 watt VarioS/RD/Jeabo pumps is - what is the external operating temperature (when run externally)?
I don't have much wiggle room for heating of the water by a pump.