Originally Posted by ja_landry
Are there any spec comparisons showing the power consumption of the split mini vs roof top units?
Just google mini Splits and the internet will cover you up with info.
Basically what I'd say after a few years of research and having a couple friends do DIY installs-
They work - the higher the Seer rating the better they work - from 16 to 27 seer. They, like the new refrigerators (Mini Splits did it first) have Inverter technology - allowing the system to only run at the speed needed to generate the temperature needed to keep the temperature right where you set it - Fans run and you cannot even hear them after the temperature is achieved.
Not the Noisy Blast you get with the old house units or the RV roof units - a blast of hot or cold then when needed another blast of air and Noise.
Today the inverter Technology has gotten into the upper end housing units and heating and cooling is achieved amazingly well, meaning at a lower cost and much quieter. (I had the inverter Technology installed in the last house I built and the only time you hear the system run is when it has more than a degree to make up - then it does it and you can hear it but once you are there not a sound the rest of the day.
You can even get them in 12 or 24 volt configurations for off the grid.
Generally - historically they went in retro-fits where duck work was not feasible, as they are a single source and usually get even distribution by quietly moving the air with the onboard fan system, most of these are in areas that were under served with the original system, more often than not Commercial applications. Overseas they have been the go to conversion for older places that now require A/C.
They are Highly efficient and if done correctly can save money, lots of Money. As far as a comparison with RV rooftop units it's really Apples and Oranges with rooftop being not even close in comparison.
They usually cost a bit more to install but can save you hundreds $$$ a year over many other lower seer systems.
Just google to get all the info you want.
Hope this is of some help,