A term used to describe a valve seat where the valve seat and valve stem share a common center. In this design, the valve can seal against the seat no matter how it is rotated. cylinder head. The part of the engine that is bolted to the engine block and caps off the top of the combustion chamber.
Heat Pump â The heat pump is built into the AC and works great if you use it correctly. From my experience and mistakes Iâve learned a lot about this little heat pump: 1. The Heat Pump does not work when temperatures are below 45 degrees. 2. Do not attempt to run the heat pump when plugged into a 20a outlet, use the heat pump when youâre plugged into a 30a or 50a plug. 3.
In other words, if you have the thermostat set to 'heat' and the house doesn't warm up at all, then you use 'emergency heat.' Heat pumps cannot keep up with the heating load in most houses when the temperature gets below a certain point. They have built in supplemental heat to add to what the heat pump does.nce we get that heat from the air into the refrigerant, it's just a matter of bringing it into the house and then transferring it into your home's air. So now the mystery is solved! It's our old friend, the Second Law of Thermodynamics again. Dog photo by Tobyotter from flickr.com, used under Creative Commons license.