Yes, I was actually looking at your .pdf drawing of this. Very interesting. I have since downgraded that A/C compressor to a 5000 BTU which did have 1/4" condensor tubing. I measured the coil and came up with my 24'length requirement. One of the problems I see happening is that I'm using this in an indirect Water heater - so the hot water keeps recirculating which of course makes my high side temp./pressure very hot. with this R290 though, it seems to hold up fairly well- I'm still able to maintain a 54 deg. discharge temp on the evap side. - this is in my dank basement so the dehumidification is welcome. I'm aactually going to pay very close attention to the pressures when I hook this one up
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