Quote:
Originally Posted by Cobb
Can you use these splits for a 3/4 bed room 1000-1200 sq ft home? Is it for whole house or 1-2 rooms?
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all of the above. these units are available from I believe 18000 - 48000 buth (1.5 - 4 tons nominal cooling) the size of the unit would be based on the application.
This site follows the standard "manual j" load calculations, and it's pretty thorough. plug in as much info as you can for each room, and add them up!
WarmlyYours | Heat Loss Calculator
roosterk - p.m. me info. I work an hour west of home as it is (Bettendorf, Iowa - don't know if that's anywhere near you) you may want to go thru the calculator first to get an idea of what you'd need. There's no soldering in mini-split systems anymore (generally) they've all gone to a 33 degree (IIRC) flared compression type fittings.
The easiest way to figure out what you need, is to decide how you want to use the equipment. The quickest and least expensive solution with mini-splits is to supplement the existing HVAC system (cold additions, upper bedrooms, attached garage
) and try to mount the indoor units on an exterior wall (making the lineset, drain, and electric all outside work - less mess inside!) and then mounting the outdoor unit at a centralized location from there. that will minimize the necessary power and refrigerant lines' length (and cost). Lastly, figure the outdoor unit's power requirements (the outdoor unit will power the indoor units and communicate with them) and bring the right power to the outdoor unit.
From there, it's just procedure, procedure, procedure
Edit: sorry this didn't click sooner - the "air brake" noise at the beginning and end of each DEFROST cycle is the reversing valve switching to and from cooling (generally they require 24v to "make" cooling - so if it fails you've still got heat
) There is a slight "click" at first. that's the reversing valve. The "swoosh" is the refrigerant's pressure equalizing across the reversing valve and TXV(S) (Thermal eXpansion Valve or Valves)
Thanks,
Victor