I agree completely.If I add one more duct will it increase my sp or decrease? I feel it seems kind of inefficient that most my ducts on the first floor are close so much to get the heat up stairs plus my sp where it should be
Adding a duct will make it drop.
I agree again...in my experience that is 50* higher than "normal" supply plenum operating temps with a Tundra.Not to mention I heard my fan jump into high mode today so I'm nervous.
As I mentioned before, I quit chasing the seemingly unachievable .2 SP.
Temp rise means much more to me than SP. If you can get a 40-50* temp rise, I'd call it good.
That should put your plenum temps in the 110* - 120* range, and that will heat your house. My Kuuma seldom runs over 120* in the plenum...spends most of the time in the 110-115* range honestly. I don't even know what my SP is (I'm sure its low, real low) not sure Lamppa even mentions SP in the manual either.
I'd open those ducts back up at least a little and run it! Adjust them for more or less heat where you want/need it, never mind the SP.