60 000 Square Foot House

1. sixty,000 BTU for 2,000 sq ft?

   I have a Carrier Weathermaker 9300TS 58MTA (93% eff.) 60,000 btu input furnace. The business firm is in MN and is two,000 sq. ft.

   I recently bought this house. For some reason, the previous owner did not put any vents in the downstairs family unit room (there is a baseboard electrical heater in in that location instead...wow, is that expensive to run). I am wondering if this furnace is just too small to handle that space or not, because I desire to add vents down in that location.

   I realize in that location are many factors in sizing a furnace, but on the face of it this furnace seems much besides small for this firm in this climate. The house was built in the 70s and is not tight.

   So, I'm trying to figure out if it is worth trying to add vents/improve insulation with this furnace or if I really just need a larger furnace. Any advice?

   Thank you

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2. Previous owner probably didn't use that room as often as you do.

   Its probably large enough, if you accept information technology zoned.

   If you but get a bigger furnace, and so you will need to brand lots of alterations to your duct work.

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3. Originally Posted past jjack100

   I have a Carrier Weathermaker 9300TS 58MTA (93% eff.) 60,000 btu input furnace. The house is in MN and is 2,000 sq. ft.

   I recently bought this house. For some reason, the previous owner did not put any vents in the downstairs family room (there is a baseboard electric heater in there instead...wow, is that expensive to run). I am wondering if this furnace is just too small-scale to handle that space or not, considering I desire to add vents down there.

   I realize there are many factors in sizing a furnace, but on the face of it this furnace seems much too small for this business firm in this climate. The house was built in the 70s and is not tight.

   And so, I'm trying to figure out if it is worth trying to add vents/better insulation with this furnace or if I really simply demand a larger furnace. Any communication?

   Thank you

   I ever tell my customers to add the ductwork as needed for the improver or basement and "run into" how information technology goes. Remember that you lot'll have the back-up heat (elec.) when it really gets common cold.

   If a larger furnace is needed, yous can do that at a afterwards time or zone as B. T. said. At to the lowest degree allow the contractor know your intentions. If room allows, he can run a seperate ductline to manually or automobile zoning in the hereafter.

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4. 60k is not out of line at all.

   If information technology can't keep upward, do everything you lot tin can to reduce heat loss.

   A room by room load calc may exist required to gear up the duct system - adding a couple of vents won't cut it.

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5. 60k is a LOT of heat. Think qty 12 of those 115V plug in heaters..

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6. Over-sizing gas furnaces never ceases to astonish me.
   I've seen 125K/80% units on 800 sq ft homes.
   I truly enjoy information technology when I see 40K units keeping customers warm, and comfy.
   And we're in a cold climate.
   Subsequently having enjoyed the comfort of a properly sized furnace, I could not imagine the agony of getting blasted by an over sized unit.
   Don't over size if your guy says 60K will practise it.
   Get it in writing, and hold him to it if it doesn't work.
   Keep in listen, on the coldest days, information technology will run constantly to maintain, and may not exist able to recover from a fix back for hours.

   "Hey Lama, hey, how about a little something, you lot know, for the effort." And he says, "there won't exist any coin, just when you die, on your deathbed, you will receive full consciousness." So I got that goin' for me, which is overnice. - Carl Spackler

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7. Originally Posted by 2old2rock

   Over-sizing gas furnaces never ceases to amaze me.
   I've seen 125K/fourscore% units on 800 sq ft homes.
   I truly enjoy it when I run across 40K units keeping customers warm, and comfy.
   And we're in a cold climate.
   After having enjoyed the comfort of a properly sized furnace, I could non imagine the desperation of getting blasted by an over sized unit.
   Don't over size if your guy says 60K will practice it.
   Get it in writing, and hold him to it if it doesn't work.
   Keep in listen, on the coldest days, it will run constantly to maintain, and may not be able to recover from a set back for hours.

   Come to think of it I've never lived in a house where a gas furnace WASN'T oversized... I guess high BTU furnaces don't cost much more to buy than correctly sized.

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8. 60,000 BTU for 2,000 sq ft

   I have a Carrier Weathermaker 9300TS 58MTA (93% eff.) lx,000 btu input furnace. The house is in MN and is 2,000 sq. ft.
   _________________

   I'm a novice looking the same problem with the verbal same 9300TS Carrier furnace in southern MI, because whether the 60K BTUs will support an addition that will bring full to ~1900 sq. ft.

   These guys say

   Links to straight purchase sites are not permitted.
   45 BTUs per square human foot (zone 4=S. MI) 50 BTUs per square human foot (zone 5=MN)

   2000 sq ft * 50/sq ft = 100,000 BTU

   Are they just trying to sell a bigger furnace or is lx,000 BTU really enough for 2000 sq ft in MN/MI? From previous posts sounds like you can definitely get by with less -- are these BTU/sq ft recommendations blowing hot air?

   Thanks

   Last edited past beenthere; 07-13-2011 at 09:06 PM. Reason: emoved link to direct buy site

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9. You lot would need to do a heat load calculation to decide what size furnace you would need. Because every house is dissimilar, sizing by square footage is a very piece of cake way to get a furnace that is either too big or too small.

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10. Because the cost of ductwork, it might be worthwhile to compare that with the cost of a minisplit heat pump for that room, if information technology's a big room. At least it'south something to check into.

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11. You have enough heat for that home. I have a1968 one,500 sq ft dwelling in MN, and with our cold -twenty˚ cold snap, it had no issue keeping the house warm.

    Too basement don't need much to keep warm since it'south in the ground.

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12. I would get alee and add vents down in that location. If the furnace is undersized then, close the vents. That elementary.

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13. REALLY ?

    Originally Posted by johnny_five

    45 BTUs per square foot (zone iv=S. MI) l BTUs per square foot (zone 5=MN)

    Are they just trying to sell a bigger furnace or is lx,000 BTU actually enough for 2000 sq ft in MN/MI? From previous posts sounds like yous can definitely get by with less -- are these BTU/sq ft recommendations blowing hot air?

    That the rule from yr 1891.

    .. Two centuries have passed. And then divide by two.

    Designer Dan __ It'south Not Rocket Scientific discipline, But It is Science with Some Art. _ _ Chiliad EEP I T S IMPLE & South INCERE ___ __ world wide web.mysimplifiedhvac.com ___ __ Define the Building Envelope & Perform a Detailed Load Calc: It'south ALL About Windows & Make-up Air Requirements. Know Your Equipment Capabilities

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14. 60,000 BTU might be on the low side simply, remember, oestrus rises and whatever you put into that room will mostly find its way upstairs, eventually (a sort of "auto-zoning").

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15. When you talk nearly over sizing, they practise information technology big time down here. This house has a 90,000 btu Lennox gas furnace for 1800 sq ft. Information technology'south fashion to much heat for Houston.

    I'm non tolerating Political Correctness anymore, from at present on it's tell information technology like it is.Veto Pro Pak - The best tool bag you'll ever ain

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16. Originally Posted by Texas-Tech

    When y'all talk most over sizing, they do it big time down here. This house has a 90,000 btu Lennox gas furnace for 1800 sq ft. Information technology'southward manner to much heat for Houston.

    
    Yous guys probably don't have much pick, since yo need to have a blower big enough for the A/c you lot need.

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17. Originally Posted by beenthere

    You guys probably don't take much selection, since yo need to have a blower large enough for the A/c you demand.

    You lot may be right, but I recall you could get a little less heat with the same blower package but maybe the temp rise would suffer. Hell, a bulk of the heaters here only run for mayhap 30 to 40 days out of the yr.

    I'm non tolerating Political Correctness anymore, from now on it's tell information technology like it is.Veto Pro Pak - The best tool bag you'll e'er ain

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18. Originally Posted by mayguy

    Also basement don't demand much to keep warm since information technology's in the ground.

    And significantly heated by radiation and leakage from the duct piece of work anyway. Spray foam your rim joist to stop infiltration downward in that location...

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60 000 Square Foot House,

Source: https://hvac-talk.com/vbb/threads/869482-60-000-BTU-for-2-000-sq-ft

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