Quote:
Originally Posted by oil pan 4
It is the mod SENA-24HF-Z.
When it gets here I will start a post on it.
I'm going to put it on a concrete pad as I did for my other split.
Last year we were using a very inefficient 10,000btu portable air conditioning unit. The kind that rejects heat through a dryer vent. The problem with this type of unit is it draws air from inside the structure to cool the condenser coils so any time it's cooling air is being drawn in from the outside.
That almost worked.
It's being replaced with a closed loop unit that has almost 2 and a half times more cooling capacity.
I'm thinking a 3/4 ton split, probably not big enough, would work most of the year.
I figured a 1 ton split will likely cool decently on all but the hottest days.
A 1.5 ton should work pretty good.
And a 2 ton removes all doubt.
A 2.5t would just be overkill.
3 ton is just showing off.
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OK, I understand your line of reasoning here. Kinda sorta like the other thread about thermostat setback and heat pumps. Rather than do a load calculation or find a unit with well-documented performance specs, just buy an oversized unit. That way, if the unit is overrated by the manufacturer or an extreme day happens, the unit will not fall on its face trying to maintain comfort. During typical operation, the unit can be throttled back towards the efficient performance range, saving energy.
I guess this idea is cheaper than buying a unit that is barely rated to provide the required load 99 percent of the time. Most likely, a smaller unit (especially a value brand product) would be running in it's "not so efficient" range more often. More importantly, the smaller unit wouldn't be able to deliver the heat or cooling required on the 1 percent days (or more often if overrated).
Sounds eerily like a few of the HVAC installers in my locale: Oh, you have an R-22 unit? Those are no good anymore. Yes, we can possibly fix it, but what you really need is this new inverter unit that uses environmentally friendly R-1234567. Since the old one wasn't able to deliver the heat every day, we will upsize your unit for you. We have a special this month on a system that is perfect for your home. We can put it in today, all you need to do is sign this paper...