EWT / LWT decrease

Will EWT / LWT continue to drop as heating season progresses? If so, any idea how much? Currently, my EWT is about 33 and LWT about 28. Recent cold snap has temps in single digits. We still have 1.5 months of winter temps left. I'm in northwestern PA. My set point is currently at 60 as house is unoccupied.

Also, how do I determine the % of antifreeze in system?

 

Yes ...most likely the temps will drop some more.

What type of antifreeze do you have. There are different types of testers for each kind.

 

Your low loop temps will be worse when you start occupying the house,

 

Loads

But you'll then have internal loads putting less demand on the heating requirements.

 

Without knowing individual circumstances, I wouldn't be surprised to find that an unocc house at 60 uses about the same amount of heat as when occupied at 72 or so.

Essentially what Urthbuoy said.

 

The setpoint was at 70 until just one week ago. I dropped it to 60 to reduce costs.

To determine the type of antifreeze I suspect I need to check with the installer, correct?

 

Is there any color to the loop fluid or is it clear?

 

All pipes are covered with insulation so all I can see is what drops come out when I check fluid temps. Looks either clear or a litle yellowish; but hard to say with any confidence.

 

CGC Code

We are required to label our loops (usually at the circ pump) with loop fluid information (type, %, FP, date).

Outside of codes, it is generally just good practice.

For us, we also add some food coloring to differentiate our antifreezes.