Quote:
Originally Posted by ecomodded
For those curious of the COP values at different temps
This chart gives a good understanding of what COP value your getting at various temperature , the COP rating on a Heat Pumps label is not its Maximum COP
I have little idea how this applies to the Portable one hose heat pumps. I think it may keep a steadier COP and work a little bit longer to heat the colder intake / infiltration air |
Basically, the one pipe unit will be more linear than the graph posted. The heat pump COP will follow indoor air temperature, period. It is going to spit out very close to the same temperature hot and cold air at a predictable difference in temperature. The system COP will follow outdoor air temperature minus exhaust air temperature.
This concept doesn't have the same measurement metrics as a traditional heat pump. Let's say you have the unit in a low spot in the home near a window. If you crack that window open just an inch, your make-up air will all come through that opening, and find the intake of the unit. The unit will find a new balance point at lower COP, but the warm air will rise up and away from the unit, and the rest of the home will (hopefully) hold more heat. Factor that one in on paper.