what size(BTU) furnace and how many ton blower????
I'm adding a catwalk to my attic and opening up a small door between two portions of the attic. I also have a pull-down stair which decreases the width of opening up to the attic. Is there a standard residential furnace width that i need to prep for? I can temporarily remove the pull-down stair to get a full 22.5", but I understand that technically I would not be able to put the stair back in following furnace installation since the code requires an access big enough for a furnace. I've heard that there are narrow furnaces (17 or so inches), but would this limit the selection available to my HVAC contractor?
Rick T
what size(BTU) furnace and how many ton blower????
I doubt your gonna need a furnace thats wider than 22.5 inches. The only ones that would even be that wide are the 5 ton 125,000 btu furnaces. & thats an awful lot of heat.
Life is like a jar of jalapenos. What you do today might burn your ass tomorrow.
21" is fairly standard andOriginally posted by rdtompki
I also have a pull-down stair which decreases the width of opening up to the attic.
I can temporarily remove the pull-down stair to get a full 22.5", but I understand that technically I would not be able to put the stair back in following furnace installation since the code requires an access big enough for a furnace. Rick T
so is
Temp Removal of pull-down stair.
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BTW, my heat load calculation is only 30K BTU (mild climate of San Jose, CA). The two stage furnace will perhaps be in the 64K range, but everyone is selling 100K.
Rick T.
should be plenty of 70,000 btu furnaces that will go up the steps. lennox b cabinet 17 1/2" wide
American Standard, 14.5" wide x 28" deep I do beleive. Also a lot of units are even smaller than this, Ducane comes to mind. Believe it is 13.5" or even a 50,000 btu Heil or Tempstar they are in the 14.5" range.
"Go big or Go Home"
Need to know what size AC is required so a furnace with the correct size blower can be selected.
AS/Trane go up to 80k BTUH with a 4 ton blower in a 2 stage furnace that is 17.5" wide.
They have 60k and 80k furnaces with a 3 ton varriable speed blower in a furnace that is 17.5" wide.
York/Luxaire has both 14 1/2" and 17 1/2" wide.
You should have plenty of brands to select from with your heat requirements.
Thanks for the very informative repsonses. I'll have an easy 17.5" width pass-through available without taking the stairs out. If there is a reason to go with a wider furnace it's easy enough to remove the stairs. Regarding blower size for AC - you really don't need AC in my part of California. We might get two hot weeks a year with upper 90's, but the humidity is low and it almost always cools down at night. Last year I put in a whole house fan and that, combined with a lot of ridge vent, does a great job of cooling the house down in the evening.
Rick T
American Standard
AUD-60-80-100 40"x17 1/2"x28"
2.0 blower
3.0 blower
4.0 blower
There is no reason to install an oversized furnace. I cannot think of one brand that is over 17.5" up to 75,000 Btu input rating.
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ICP 92% (which is the H series) is 19 1/8" Wide or better.Originally posted by RoBoTeq
There is no reason to install an oversized furnace. I cannot think of one brand that is over 17.5" up to 75,000 Btu input rating.
Would have to downgrade to (the N series) 90% N9MP*075B12B which is 15 1/2" wide.
Or for his heat requirements a 90% N9MP*050B12B which is also 15 1/2" wide.
** All being 40" high and 29" deep.
I wonder why so wide?
Training is important!
Practical Training is a must!
When it comes to service, the 19's are a LOT better to work on. The 15's have some tight areas, when it comes to getting to some of the drain tubing connections.