DIY Home Improvement Forum banner
1 - 9 of 9 Posts

·
Underwriter
Joined
·
96 Posts
Discussion Starter · #1 ·
Hello. I'm currently getting a new gas furnace and air conditioning put into my 1300 sqf mobile home. I'm getting a 3 ton RUUD air conditioner with a 4 ton furnace rated at 75,000 btus and 80% efficiency. I guess that doesn't really matter, but I got a great price on them!

Anyway, I was wondering since my electrical panel is full (no room for any more breakers) the HVAC guy said he would remove one breaker and put a quadruple 30 amp breaker on it. Is this safe? I have 100 amp service. I also have an electric dryer.

Thanks.
 

·
Administrator
Joined
·
41,875 Posts
Its commonly done, and UL and NEC approved.
 
  • Like
Reactions: vln

·
Underwriter
Joined
·
96 Posts
Discussion Starter · #3 ·
I got 4 estimates, that being the best at $5000 straight with a new 16" duct from the return center of the mobile home system.

Is 3 ton too much for a 1300 sqft mobile home? All 4 estimates said that is the minimum but from what I read here, I should be getting a 1.5 ton or 2 ton system??
 

·
Banned
Joined
·
17,158 Posts
Really depends on the load calc, and what the man j calculation came to be. 3 ton is kind of over kill for a manufactured home, but if it is leaking air like a sieve, it really does not matter how many tons the unit is, it would never keep it cool enough, nor shut down.
 

·
Administrator
Joined
·
41,875 Posts
Mobil homes generally need a larger A/C then a stick framed one does, so 3 tons may be the right size.
 

·
Registered
Joined
·
622 Posts
Where in the country do you live?
Did you already have a gas furnace and an AC unit?
3-tons is probably too much, but it depends on where you live and what
your insulation is.

Also, 75,000 BTU is also probably too much. It won't hurt anything, but you could lilkey save money with a smaller gas unit.


Tell us more about your existing heating and cooling setup. Model numbers, etc.
 

·
Administrator
Joined
·
41,875 Posts
Also, there should be a tag from when your home was made, that states what size A/C for different areas. Its a HUD requirement.
 

·
Underwriter
Joined
·
96 Posts
Discussion Starter · #8 ·
I can't really find most of the information you requested, unfortunately. Only thing I know about the place is how old it is, (from 1972 Greenbrier, ((these did not come with air conditioning, but was available to be later put in by replacing the furnace I was told.))

The existing furnace is the original, from 1972, a Coleman. All the other tags have worn off with time so nothing is known about the size or how many btu's it puts out. It is a simple two wire set-up, no fan option, but has 2 other wires for later hookup. It is in a closet on the outside of the mobile home.

I took off the metal siding and discovered what the insulation is, a fluffy type of material, so it's very bad at insulating I'm guessing. Note, this is a mobile home (double width), not a manufactured home.

The 4 guys that came out each said that 3 ton was needed due to it having poor insulation and due to the ducts, I needed a larger fan motor to blow the air to overcome the series of one panel sheetmetal ducts (no individual ducts here). That's why all of them mentioned such a big furnace.

I live 2 1/2 miles from the beach, in Southern California if that helps.

Thanks.
 
1 - 9 of 9 Posts
Top