furnace guy at the house today - http://www.hvacmechanic.com/ Forums
Original message
| wdsfr68
 |  "furnace guy at the house today"
, posted Thu 15 May 10:47  
Quick summary:
120 degree coming out of my main floor vents but only 88-90 degree coming out of second story vents. Furnace is about 6yrs old as is the house. Checked with/without filter and same results.
HVAC guy talked to my wife this morning and said we could try "air balancing the furnace" so we're receiving the same airflow from all registers for $350. He comment that we have some major bends in the ductwork.
He then said we may want to go with a new furnace, Carrier Infinity 96 as this may help. Unfortunetly I wasn't there to talk to him but if we have bad bends in the ductwork will it really matter what type of furnace we have. I understand the variable stage is more efficient but if the heat can't get to the register what differance does it make where it's coming from.
Also, has anyone ever heard or used Aeroseal? Apparently a company that comes out to seal any ductwork leaks.
I was going to try an inline duct fan first to see if that made any differance. Any thoughts as I don't really need to spend $5000 at this time.
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Replies:
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| Jojo98
| "Re(1):furnace guy at the house today" , posted Thu 15 May 22:20
If the system is 6 yrs. old and just began doing this, it's unlikly a air balance problem.
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| theduke03
| "Re(1):furnace guy at the house today" , posted Thu 15 May 17:51
Is this a zoned system?
"My dad was the most feared furnace fighter in Northern Indiana."
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| tinner73
| "Re(1):furnace guy at the house today" , posted Thu 15 May 15:21
major bends??? how will he balance the system..flow hood?..anemometer??
he's trying to sell you a new furnace....run away from this guy.
instead of aeroseal...go to Home Depot and get some mastic to seal the seams and connections of the ductwork. you may need the duct insulated if it goes through an unconditioned space in your home.
inline duct fans are a waste of $$$$$$$.
union trained in Chicago
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| | wdsfr68
| "Re(2):furnace guy at the house today" , posted Fri 16 May 09:55
Thanks
After about an hour of messing around with the dampers I'm getting much warmer air upstairs.
Just wondering what type of sealant I should use. Should I use the tape or the sealant ? If sealant, is their specific sealant just for ductwork ?
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| | Ray Jones3
| "Re(2):furnace guy at the house today" , posted Thu 15 May 17:01
I agree with tanner that it is probably an insulation problem. If air leaves the furnace at a given temperature the only way that it can change between the first floor outlets and the second floor outlets is by a loss in heat. This is caused by losses of heat through long insulated runs or short uninsulated runs, or some of both. Hope this helps.
rayjones3
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