I'm trying to heat and cool a 1970 double wide mobile home. It's 24x60 (1440') and is a weekend vacation river / desert house. It's has multiple old hvac systems, a central heater, a central ac and some other thermostat. The ducting on the ac is under the house and totally f'd. There is no way any of it is useable and would need to be redone completely. The ducting for the central propane heater is in the ceiling (I think) and pretty dirty. I haven't tried it because I think spiders and dirt will fly out everywhere. The previous owner used space heaters. There are 3 window ACs installed in the windows with plywood. It looks super ghetto but works ok. The windows have loose seals and are single pane. Summers can top 120°f and winters can get down to about 20.
Some calculators online say I'll need over 100,000 btu and that seems like a ton. It's in the middle of nowhere, 2hr from any decent size city. Finding anyone to do the work is nearly impossible. I've done ac once on a car (vacuum evac / recharge), but never house hvac. I'm thinking about installing a split 30-60kbtu outside unit with a 24k in the living room and a 12-24k in the other side of the living room that will be converted to a 3rd bedroom soon. Massive cooling capacity is a plus for when I show up and the house is 130°. I like the idea of the ductless design because I won't lose efficiency under the house.
If the system works good I'll add another dual unit split system for the back 2 bedrooms. Then I'll have a total of 4 indoor units for heat and cooling and can evaluate removing the ugly window ac do I can put in dual pane windows.
I have argon and co2 tanks I could pressure test with, and a couple old but expensive (biotech) vacuum pumps.
Should I even try the old central heat, go central ac / heat and crawl around under a nasty old mobil home running ducting, or go with 2 mini split dual systems?
Is 30,000btu enough or should I go 48k+ for half the house?
I'm thinking mitsu, Fujitsu, or maybe mr cool, but pre charged lines are not a big deal to me. I'd rather spend more and not have to screw with it when it's 120° and I'm trying to concentrate on drinking beer and boating.
Some calculators online say I'll need over 100,000 btu and that seems like a ton. It's in the middle of nowhere, 2hr from any decent size city. Finding anyone to do the work is nearly impossible. I've done ac once on a car (vacuum evac / recharge), but never house hvac. I'm thinking about installing a split 30-60kbtu outside unit with a 24k in the living room and a 12-24k in the other side of the living room that will be converted to a 3rd bedroom soon. Massive cooling capacity is a plus for when I show up and the house is 130°. I like the idea of the ductless design because I won't lose efficiency under the house.
If the system works good I'll add another dual unit split system for the back 2 bedrooms. Then I'll have a total of 4 indoor units for heat and cooling and can evaluate removing the ugly window ac do I can put in dual pane windows.
I have argon and co2 tanks I could pressure test with, and a couple old but expensive (biotech) vacuum pumps.
Should I even try the old central heat, go central ac / heat and crawl around under a nasty old mobil home running ducting, or go with 2 mini split dual systems?
Is 30,000btu enough or should I go 48k+ for half the house?
I'm thinking mitsu, Fujitsu, or maybe mr cool, but pre charged lines are not a big deal to me. I'd rather spend more and not have to screw with it when it's 120° and I'm trying to concentrate on drinking beer and boating.