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  • Pairing split systems with ERVs - GreenBuildingAdvisor
    The mini-split will probable be ceiling 0r wall mounted and would likely be ductless The hope was that we could extract stale air from the bedrooms and return fresh air into the main central space, where the split system will temper the air to be drawn into the bedrooms (see attachment)
  • Fresh air for minisplits - GreenBuildingAdvisor
    My HVAC contractor is planning to use Mitsubishi mini-splits, some ducted, some not I am on board with this idea, but we are looking at fresh air alternatives I was originally looking at the AirCycle g2, but it seems that the Mitsubishi wiring may be a problem, since it is not "standard" Also, it seems the Mitsubishi fan runs continuously, albeit at a low level Other than an ERV, which may
  • Using mini split systems on large open spaces
    I know there seems to be a millions suggestions on line for using mini splits to heat, cool, do your laundry etc However, as much as I have googled, and my GoogleFoo is strong, I have found almost no discussion on how to heat and cool large open spaces with mini splits So my situation A large-ish room, 62x36, or roughly 2200 sq feet, 15ft ceilings (upstairs floor) (Shop Work space
  • To Duct or Not to Duct Minisplits - GreenBuildingAdvisor
    And a ductless mini-split ain't it Panasonic has a hybrid solution to the issues raised by shawnbatt, although it's not evident it's suitable for a small house like this The Panasonic Oasys system uses a utility room as a plenum, dumping fresh air, heated cooled air, dehumidified air and filtered air into one space from which conditioned air
  • Energy efficiency of multi zone mini splits vs. multiple single zone . . .
    Most multi split system compressors do modulate, but only to turn on and off each indoor unit The individual indoor units don’t modulate What is the house layout, sf and location? Who determines the load? If you can get down to two single head systems, maybe using a mini duct, that would be most efficient
  • Just Two Minisplits Heat and Cool the Whole House
    Carter Scott was one of the first builders bold enough to build a cold-climate home heated by only two ductless minisplit units (one in the downstairs living room, and one in the upstairs hallway) Skeptics predicted that the unheated bedrooms would be cold and uncomfortable Yet Scott was confident that the home’s excellent thermal envelope — with high-R walls, triple-glazed windows, and
  • Do mini-split systems need to balance capacity inside and out?
    The part cost between two one to one mini split and equivalent sized 2 zone multi split is very little Unlike a multi split, one to one units have a much wider modulation range and you can oversize them a fair bit an not loose efficiency
  • Help me understand static pressure in ducted minisplit systems
    The Fujitsu rep you talked with certainly doesn't know his product or duct design very well I routinely design + commission ducted mini-split systems using Fujitsu ducted units (over 50 systems in the past 3 years) We typically achieve our design airflows with total external static pressure in the range of 0 15 to 0 25 in w c Good luck!
  • Compatibility of Minisplits and Smart Thermostats
    These systems claim to adjust the HVAC based on whether or not they sense motion (ie occupancy) 1 With a mini-split, isn’t it supposed to be more efficient to let it run 24 7 at the same temp, rather than allowing it to idle, then needing to ramp up at a certain time? 2
  • Opinion on Blueridge Minisplits - GreenBuildingAdvisor
    The whole point of mini splits is that it is one of the best ways to retrofit a house for energy efficiency and coupled with PV, to get close to a net zero energy balance But the costs associated with them have made them prohibitive for all but the very wealthy Average folks cannot afford $20,000+ to retrofit an entire house with mini splits





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