Home Energy Products / Mitsubishi Mini Split

[ITD]

Originally Posted by ishoot308

Believe it! I think what you are missing is the fact that all three indoor units work off ONE condenser you are not running three condensers for three indoor units. The three indoor units draw very little power, 1 amp or less if I remember correctly as it is basically just a small fan motor. The outdoor unit runs on 220 volts but I do not remember the amp draw.

My Honda generator has a wattage use meter and with all three indoor units running on high AC and whatever else I had on in the house like misc lights, large screen TV, two refrigerators, etc, etc. I was drawing 3300 watts off my 6000 watt portable generator. Hardly under powered. The other thing you must remember there is no huge start up surge of power required like most AC condenser units. Mini-splits are run with an inverter driven, frequency controlled compressor motor, that allows the compressor to soft start and also to run at reduced output instead of cycling on and off.

As an fyi, the electrician for Home Energy looked at my generator and confirmed that it would easily run all three units and have plenty of left over capacity and told me not to worry about it at all.

Dan

Ah, 6000W generator, sorry, I don't think of that as portable, I was thinking one of the 1000 w units. Sorry I doubted you.

[SIKSUKR]

Dan,doesn't the condensor run on dc,which gives it the ability to lower the compressor speed according to demand?If so it would explain to me why these units are so efficient.

[ishoot308]

Originally Posted by SIKSUKR

Dan,doesn't the condensor run on dc,which gives it the ability to lower the compressor speed according to demand?If so it would explain to me why these units are so efficient.

Siksukr;

Yes the compressor motor is direct current. I don't know enough about electricity to tell you "why" they are so efficient only can tell you that my monthly electrical bill is a lot lower with these units over my previous three portable "room rattlers"!!

Dan

[DRH]

Originally Posted by SIKSUKR

Dan,doesn't the condensor run on dc,which gives it the ability to lower the compressor speed according to demand?If so it would explain to me why these units are so efficient.

SIKSUKR, we just signed a contract with Steve Gorse at Home Energy Products today to install two Mitsubishi heat pump heat/cool units in our home. The answer to your question is ''yes", the main compressor unit adjusts its speed according to the demand and it uses the least amount of electrical power possible to maintain the desired temperature in the controlled area.

A number of our neighbors have installed these units, all of which were installed by Home Energy Products in Belmont, and each neighbor is totally satisfied with the results.

[Lakesrider]

I'll throw my udate in as well. Mine is going on 6 troubnle free years now....Still running strong. Still getting the yearly checkup/cleaning. well worth it to keep the unit running efficiently. Matter of fact I think my split has been running non-stop for about 2-3 weeks now. A nice cool 69 degrees in my house right now. My wife actually put a blanket on the bed last night....LOL. I don't like it too cold but the key is keeping the humidity down which also keeps any mold from all this humid weather and rain from rearing it's ugly head. Gotta love my 29,000btu Mitsubishi. Especially this week....

[Fargo]

@thelake thanks for the update and performance info. There's a great article in the Sept issue of Fine Home Building about minisplits. They list the pros and cons, appear to be many more pros. I'm in the process of improving my insulation.

[DickR]

Originally Posted by Lakesrider

...A nice cool 69 degrees in my house right now. My wife actually put a blanket on the bed last night....LOL. I don't like it too cold but the key is keeping the humidity down which also keeps any mold from all this humid weather and rain from rearing it's ugly head.

Keep an eye on the outside air dew point. It isn't a good idea to run the inside air at a temperature below that dew point. You don't want that humidity condensing/absorbing behind the sheetrock, particularly if you have a sheet of poly as a vapor barrier or vinyl wallpaper.

[Slickcraft]

We had the 15,000 BTU mini split installed by Home Energy last week at the island camp. It has been pretty nice having the cottage cool and dry inside this past week.

The install went well as they had done their homework based on the initial site survey.

[BroadHopper]

Originally Posted by DickR

Keep an eye on the outside air dew point. It isn't a good idea to run the inside air at a temperature below that dew point. You don't want that humidity condensing/absorbing behind the sheetrock, particularly if you have a sheet of poly as a vapor barrier or vinyl wallpaper.

My Mitsubishi split has the inteligent microprocessor that takes into consideration the outside temperature as well as the inside temperature and adjust the unit accordingly. I'm not sure about the humidity although the thermostat housing shows inside and outside humidity.

You would think the processor will adjust according to the dew point.