heat pumps...

[kb0nes]

Somehow I think the idea of using water (or something) as a heat transfer fluid because you are concerned with complexity/reliability is crazy! You are adding an extra layer that will only negatively effect efficiency and reliability.

The problem isn't lengthy Freon lines, if the installer does the job correctly lengthy refrigerant lines will never be a problem. If the installer is a hack you will have potential problems with anything he/she touches.

 

[cfz2882]

measured current draw

25*this morning and MrSlim putting out ~130*air,pulling 5.2 amps(230v)with compressor sounding like running ~4000 RPM- maximum current rated at 7.2 amp.Kinda weird hearing compressor running faster than ~3400 of line driven induction motor compressor.Running easy,~2000 rpm,amps was 2.5 A. Did see it run a defrost once-stopped the fan motors and ran the compressor to about 2000 RPM a stream of water running out the drain of the outdoor unit.

 

[tolivac]

The "Slim" units we have at the transmitter plant are completely quiet outside-no sounds at all.You see the fan turning at various speeds.The room unit is silent,too-have to check the vent on it to see if its going.And most of these units have been running year round here for many years.Mitshibishi and Fredrick brands.One thing interesting between the brands-the fans on the compressor units turn in opposite directions!Of coruse the weather here is much more mild than the SD winters!If those units warm during the SD winters-its a really good unit!I used to live in Rapid City SD-the winters here are nothing!The main diffence here is you get more freezing rains.Raises hob with the antennas!

 

[cfz2882]

winter performance good

was down to ~5*the other night and the MrSlim was still putting out decent heat-have been running it a lot lately-increased my electric bill by about 30%,but my usage is pretty low anyway and gas bill seens unusually low now... snowing here all day,runs a defrost every couple hours-gives a puff of steam when the outdoor fan kicks back on after a defrost.