Last seen: Dec 14, 2025
@gary some the trends you've posted show the LWT is at the setpoint. They also show the setpoint is changing and they show the compressor frequency ...
Hello, I confused about why this is a problem for you. Is your house not getting warm enough? Thanks Bob
@gary I'll try and help, but at the moment I'm not really sure what the problem is. <rant> On a more general note, I read threads like this...
The lower the DT the higher the flow rate. The lower the DT on the heating water side, the hotter the average temperature of the heat emitter, so th...
@jamespa I don't know where this comes from. I've heard a variety of numbers mentioned for heating design. 10C, 5C, 7C. I think it comes from ...
Hello @jamespa I've attached a spreadsheet which attempts to show how a heat pump compressor system works. The gas enters the compressor as a s...
OK, so I'm just thinking out loud here: You loose energy through the walls, roof, and draughts - anywhere else? The 10% lost energy could be going...
Hello, sorry I've been quiet for a while. In CathodeRays case the plate heat exchanger was acting as restriction in the flow of energy from the heat...
@cathoderay at constant room temperature, energy in = energy out Q = UA.DT tells you how much energy flows through an object, in this case a wall, w...
Slicing and dicing data can sometimes be fun, but it's often frustrating. I often start by asking "what do I think i'm looking for". So..."does se...
@cathoderay what would the plot look like if you used (Inside temp - Outside temp) as the x-axis? If Q = UA.DT the gradient of the trend would be UA...
@transparent, thank you. That makes sense. Much appreciated. Regards Bob
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