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For all you Idaho, WA and MT HVAC Co. Here in Oregon we are going to energy star 3.0 in 2013. I know that the previous mentioned states went 3.0 in 2012.
My question is how was the transition? How...

I am sorry I am all over the place. If I took a ESP reading with my manometer and the return temp was 50 deg would I have a lower static than if taken at 70 deg

That is how my question started. So with at least 2 numbers and correction factor btu out, cfm can figure ^t....... btu out, ^t can figure cfm.

So aside for assuming the name plate is correct how would you get the correct btu output?

sorry I was trying to quote Gravity when asking how I got BTU output

I would like to tell you a combustion analyzer. This is more of something I was thinking of and not a real world situation. Normally I have a blower chart and use my manometer.

With no blower chart on a gas furnace what is the equation to figure airflow? Is it btu output/temp rise/1.08 = cfm? I cant remember. I would like to get me post count up so I can really benifit from...

The transformer. I am assuming you are not being a Smart A:censored: like the others. This site is good and the few arrogant pr:censored: on here shouldn't ruin it. AOP ? I thought the P stood for...

I have a duel fuel Tempstar T9MPV125 with a Tempstar T4H7060 2 stage Heat pump. I have the system zoned into 3 zones, Eac and humidifier.
This story covers a couple of months of on again off again...

Tempstar has a 40k btu 95%. T9MVX40F12.... Sorry missed the Modulating.. They do have a mod coming out not sure if there will be a 40k.

I was told that esp should be taken distance of 2.5 times the diameter of the blower wheel from the center of the blower shaft.

I thought it may be a restriction. In order for it to shoot up that fast wouldn't it have to be a complete restriction and the suction pressure drop? Why does it run without pumping.

I am dealing with a Bryant 3 ton 410a split system ac. Customer reported the AC making a loud banging noise on start up. I put my gauges on and started the unit. In the off position the gauges read...

Yes I am in the biz. I am not NATE. I have checked with a holegen leak detecter and soap bubbles and looked for oil spots.
The outword crack in the liquid service valve cap has me baffled. Maybe...

I have a Tempstar 5 ton 2 stage heat pump in a 4000 sq ft house. The house is seperated into 3 zones.
Here is my problem. My system was operating and heating the house just fine (I HAVE NO BACK UP...

Is your AC a 2 stage? It sounds as if it is and it is operating on the first stage.