I agree a split system is the way to go, more $ but a lot more
efficiency so if it runs a lot the payback is there. Plus they are
super quiet inside and out with the compressor outside, which could be a
cooler/shaded location for efficiency improvements. My variable speed
(inside and outside) 27k btu Panasonic makes no RFI. It is cooling only
but heat/cool reverse cycle is pretty much the usual now. With 3 air
handlers, it cools a 4k sq ft shop + shack except on very hot days and
then a 25k wall unit is fired up as support. A GE "window" unit with 3
fixed speeds and no rfi.
Way back I installed a 25k "window" unit up 8' by with a 12' 4x4 I
braced floor (had a hearth to push against, so no holes in the oak
flooring) and wall (against a 2x6 lagged across 3 studs), a forged eye
thru the 4x4 and a good sailboat 4:1 jam blocks rigging. The hoist
point is close to the wall so the bending load is small on the 4x4.
Then the finesse part (besides how to securely sling the unit) is
sliding into the housing while slacking the line at the same time. But
the weight is under control at all times if rigged right. Some plaster
touch up and done. It cooled a peaked roof 24' x 26' kitchen/family
room split with a 7' high pony wall so it had to be high enough to blow
over that wall.
Grant KZ1W
On 7/13/2018 21:32 PM, Aaron Kreider wrote:
Two might be the way to go. A lot easier to install smaller units if
you're doing it yourself.
Or if you are willing to spend a bit extra, you could try a mini
split. You can double the efficiency and it'll be nice and quiet.
I'm trying to DYI install one, but I don't recommend that unless you
know HVAC.
Aaron
On 7/13/2018 11:21 PM, NA6MB Mike wrote:
Rent scissor lift. Only couple hundred for a weekend and provides a
nice stable platform on which to work.
NA6MB
Mike
Sent from my iPad
On Jul 13, 2018, at 6:17 PM, Steve Kurtzman <stevew7sjk@gmail.com>
wrote:
Hi Don,
OK ya got me there. Not the kind of shack I was envisioning!
So basically you want an air conditioner with "mechanical
controls". I see
that they are still made, such as by Frigidaire, but only up to
12,000 by
them.
Maybe use two of them at opposite ends of the shack? More expensive
but
better air distribution.
Steve
sparkie001@pobox.com
stevew7sjk@gmail.com
www.facebook.com/imetsteve
On Fri, Jul 13, 2018 at 3:58 PM, Donald Chester <k4kyv@hotmail.com>
wrote:
Holy Moly! 2 tons of A/C for a shack? That's enough for a whole
house!
Steve
sparkie001 at pobox.com
Shack is 24' X 32' with 12' ceiling (formerly a one-room school
house).
Building is unshaded in direct sunlight in afternoon. QRO
transmitters and
other station equipment give off considerable heat.
Various on-line calculators recommend between 19k and 30k BTU with
pertinent data entered. The old a/c is 23k, although at 40 y.o. it
probably
doesn't have that much cooling capacity any more.
Besides RFI considerations, I have to figure out a way to get the
old one
down and the new one up in its place. Hole in the wall is 8' high
off the
floor. Most units I have checked take the same size hole and weigh
130-150
lbs.
Don k4kyv
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