i gotcha now! i have zero experience with mini-splits. i suffer from the "old dog new tricks syndrome"!
I love eBay’s new other option when searching for goods. And Setting up notifications for brand new scratch and dent mini splits. When the price was right I was all over them. Dents an scratches no problem, zooming in on the pictures when there was fin damage to the radiators. A deal or no deal?
Think I’ve gotten about 8 units over the years like this. some mine , and a few for the other 2 grow rooms I’ve helped people setup.
Biggest score was a buy now for 2 brand new 36kbtu Mitsubishi outdoor units, commercial pseries so they are good down to -10f, high efficiency 19-21 seer(efficency / seer rating depending on which inside head unit is used. the more radiator or surface area of the coiling coil, the higher the efficiency rating, within reason) , double fan units so they have a big coil to remove heat…$1000. An $250 shipped to the local fedex hub.
1250 for 2 units that are over $5k a piece. Nothing wrong other then a few small dents on the covers an a few radiator fins got pushed around.
I had dinner tonight with a hvac buddy of mine who used to work for trane servicing large commercial hvac systems. Picking his brain on the next setup I may build. Another 18 lighter but with no standard compressor style air conditioners. I only have another unused 60 amp sub panel to the barn. And maybe I can grab another 15-20 amp from the other feed, for fans an dehumidifier etc.
With night temperatures here 60f an below 9-10 months of the year. And Target temps of the room is 80-84f, that means I would have a 20-24f drop in water temperature Atleast. And larger drop during the winter. 3 runs a year an shutdown during the summer.
All hydronic cooling, a water & glycol system. indoor air handler removes the grow room heat.
The heated water is plumbed to 2 areas with air handlers that may require heat, a new veg room, and then the attached house.
When there is excess heat after those 2 air handlers, it will be routed to a series of large cast iron radiators outside , or a small cooling tower.
Everything configured to bring heat to veg or house or directly to outdoor radiators.
Something like this I could add about 40kbtu of heat when needed to veg and house. And save about 30-40% on this total room electricity. minus the water circulation pumps an air handler fans Electrical consumption
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