Troubleshooting: Not providing enough heat..

Charlie from wmass

I am not saying design for 180 degree water. I am saying that to warm the home at -20 you may need 180 those days.

Charlie from wmass

Dealing with existing equipment that is.

Rich_49

Ice , Who was your comment directed towards ? The house needs what the house needs and the strategy will vary form building to building . I agree that a higher AWT is not always the best way to go , most times the flow required is unsustainable .

icesailor

Rich said:

Ice , Who was your comment directed towards ? The house needs what the house needs and the strategy will vary form building to building . I agree that a higher AWT is not always the best way to go , most times the flow required is unsustainable .

No one in particular.

But on the subject of what houses need for heating temperatures, if domestic hot water is needed from the same system, most newer systems are woefully undersized.

No one suggests installing steam boilers that are sized to the minimum OAT and not the connected load of radiation. No one ever complains about running out of hot water in an old steam system. Unless the thermostatic mixer moved South. Unless you are a Plumber/Heater, who has spent a lot of quality face time with commercial/institutional large potable hot water usage, you have probably not developed that understanding.

No one tries to run a steam boiler at 130 degrees and expects it to make enough steam to heat a building.

Rich_49

I hear that . The ever elusive and never to be had 130* steam .

RobG

Damn, did this thread get off track or what?

Charlie from wmass

-25 hg that is.

icesailor

All you need is a bigger vacuum pump.

Isn't that how you get the water/moisture out of a refrigeration system? Pull the vacuum pressure down so all the moisture boils off as steal an replace it with refrigerant?