Walter R. wrote:
Thank you, all.

The installer says that the fan speed in this dual-stage system is set by
the factory and cannot be lowered. It's a Rheem 80% 2-stage Criterion Two+,
Model RGPK 70.

The installation manual is of limited value.Wonder where I can find a
maintenance manual. (The old tinkerer in me).

Maybe I can reduce the air speed by using a heavy duty air filter.

--
Walter
www.rationality.net
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"Walter R." wrote in message
...
I had a new 70,000 BTU Rheem furnace installed in my house. The airflow
from the registers is rather noisy: You can hear the air rushing through
the registers, not exactly whisper-quiet!

The temperature differential between return duct and heat register is 30
degrees (from 70F to 98F). Is this a normal differential or can the fan
speed be reduced, resulting in a higher temperature at he registers?

Thanks

--
Walter
www.rationality.net
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This is Turtle.

1] that model has 4 speed taps to choose from.

2] Try the restrictive filter to see and check the Heat rise. you need
like others here have said 40 to 60 degrees F Heat Rise. Now i like 40
degrees F heat rise.

TURTLE