what size ac/heater

[jethrob]

It's a 30x48(approx 1400 square feet)
12 foot ceiling height
6 inches of fiberglass on walls
12 inches of fiberglass in ceiling
4 small windows
one walkdoor
one big ars 14x10 sliding door. I plan to get an insulated overhead door installed sometime soon.
Building is finsihed with metal on the inside.

It's a working shop. System is going to have to deal with in rushes from moving equipment in and out multiple times daily.

Looking at this one:
http://www.ebay.com/itm/Goodman-3-T...084147?pt=Air_Conditioner&hash=item3f317afff3

 

[Charles (in GA)]

Your location will help alot. Go to the control panel and select the very top item, Edit Details, and scroll down to where you can add your location, a state or something slightly more specific is good enough, such as Northern Calif, or south Georgia, or something that will give us an idea of the climate you have to deal with.

Also, do you have natural gas, or propane, or electric only? How big of an electrical service does the building have? 100 amp, 200 amp, single phase, three phase.

Charles

 

[jethrob]

Southeastern IL-weather is all over the place

100 amp electrical service

Shop is a lot busier in the summertime than the winter. Primarily working on watercraft so the doors may not get opened daily in the winter but will be opened off and on in the summer.

Also will not be running AC or heat all the time just when we are out there and the weather is not tolerable.

 

[jethrob]

whoops
we have natural gas

 

[jethrob]

other option I was thinking about rigging up an ventless heater to get the 100% effiency.

I think it would probably keep the shop above freezing.

 

[jethrob]

bump

 

[pseudorealityx]

other option I was thinking about rigging up an ventless heater to get the 100% effiency.

I think it would probably keep the shop above freezing.

A ventless heater is going to DUMP moisture into the space, not to mention fumes. Bad idea.

 

[jethrob]

A ventless heater is going to DUMP moisture into the space, not to mention fumes. Bad idea.

BS

I know there is a lot of phobia surronding them. We have one in our house so I can tell you first hand there are no fumes or moisture problems. The air gets really dry in the winter time so some humidity is nice. Maybe its because of our location........they work very well around here.

 

[LS6 Tommy]

A ventless heater is going to DUMP moisture into the space, not to mention fumes. Bad idea.

100% FALSE...

Tommy

 

[Falcon67]

I'm thinking - no expert - your Goodman link is about the right size. We're on a Goodman 3.5 ton at our house in 1700 sq/ft with ceiling heights 8 to 10', without the big door LOL. But we have grand kids and on certain days, all door hinges get a workout.

 

[pseudorealityx]

100% FALSE...

Tommy

Which part is not true?


C3H8 + 5O2 ---> 3CO2 + 4H2O

And that's under perfect circumstances, ideal combustion air, etc.

 

[pseudorealityx]

BS

I know there is a lot of phobia surronding them. We have one in our house so I can tell you first hand there are no fumes or moisture problems. The air gets really dry in the winter time so some humidity is nice. Maybe its because of our location........they work very well around here.

It's not a phobia, it's a chemical reaction.

Unless the heater is specifically listed as approved for unvented use, it's against code. 2012 IFGC, Chapter 5, Section 501.8.

You didn't specify what type of heater you were talking about.

 

[jethrob]

damn what a terrible thread

 

[bazar01]

I acquired a 50+ year old quadplex in the Buckhead area of Atlanta and all four units have ventless natural gas heaters. Tenants love it in the winter and there was no single incident reported.
But time came, insurance carriers just refused to insure property due to these ventless gas heaters. So they were all removed and replaced with heat pump splits and mini-splits.
Check with insurance carrier if they will allow this type of heater.