GeoTherm size and age

Ran into a couple of brands today I am not familiar with. Age and size anyone?

Mn#: VW-26
Mfg#: SSAVW26280
SN#: 5-I-TAH-4830

Climate Master
Sn#: 91L017304

Unless I hear different, I will advise an estimate of a 1980, 26 KBTU and a 91 36 KBTU units. No help anyone? Educated guesses accepted. Year built 1981, both system controlled 2400 ft^2 condo

I don’t have a lot of information on EnerCon, but I believe they are one of the few manufacturers that used the letter I. Everything I have about them indicates that they used a sorry coding system. I think you have a September unit from 1955, 1965, 1975, or 1985. They were out of business by 1995, so that year and 2005 are not options. I will stand to be corrected since, as I said, I don’t have a lot of information about them.

On the Climate-Master, that serial number appears to be the Canadian Climate-Master, which would make it a November 1991 unit.