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AceH · Feb 12, 2008, 06:06 AM

I have a gas central heating system. The heating guy adjusted the blower speed TO medium. It was set on low. I have 9 ft ceilings throughout the house. Will this adjustment help circulate the warm air better than the low speed? Will the higher blower speed push cool air through the system BEFORE the air is sufficiently heated?

hvac1000 · Feb 12, 2008, 07:23 AM

Will this adjustment help circulate the warm air better than the low speed?

Yes it will

Will the higher blower speed push cool air through the system BEFORE the air is sufficiently heated?

NO the blower is activated by a temperature activated device.

AceH · Feb 12, 2008, 09:57 AM

Thanks hvac1000.

AceH · Feb 14, 2008, 06:43 PM

I have a Bryant Gas Furnace model # 349HAV036075. As previously mentiond the service guy adjusted the blower speed to medium as it was on low. The brochure states:
"PRECISION-CONTROLLED OPERATION...Is one benefit of our electronic control board. Blower delay function allows air to warm up before being delivered to your living areas."

QUESTION: Is it safe for me to assume that as the blower speed is adjusted, the delay function (which allows air to warm up before being delivered to the living areas) is AUTOMATICALLY adjusted to accommodate the blower speed adjustment?

T-Top · Feb 14, 2008, 07:20 PM

The faster the blower speed the cooler the air at the registers. That's the reason for the factory set up of a lower blower speed for heat. On the newer furnace the blower is brought on by time not temp. You will loose heat with a higher volume air flow. Its like blowing on your soup spoon before you put it in your mouth it will cool it off.

AceH · Feb 14, 2008, 07:51 PM

My vents are in the ceiling. I have 9 ft ceilings throughout the house. At the lower speed, the warm are was basically hovering at the ceiling. The medium speed APPEARS to move the warm air down a bit better. I was hoping this is not just my imagination or wishful thinking. I would like to have this thing tweaked to peak performance without having to pay SEVERAL SERVICE CHARGES each time for them to come out and "experiment". Thus my question about the AUTOMATIC DELAY as the blower speed is adjusted.

I would like to gather as much information as I can from you guys who know about this before making another service call. I do appreciate your input in this.

T-Top · Feb 14, 2008, 08:10 PM

The speed setting is for the home owners preference. Lower speed less air noise and warmer air at the registers(slower air change over) it is made to run at all options. Some systems need that extra tweak for the home owner to be comfortable. The low speed may not have been what you needed for your square footage and duct work lay out. If your staying warm at this setting than that's what it needs to be set on.

AceH · Feb 15, 2008, 06:12 AM

I decided to leave the blower speed as is for the rest of this winter. At the beginning of each year I pay for "annual maintenance" (as part of the warranty agreement) for my furnace and A/C (in the spring they check the A/C and in the fall they check the furnace). When they come back in the fall I will ask them what is the heat temperature at the registers and check to see what is the recommended setting for my system and should there be any compensation for the higher than average ceilings).

FYI:
The initial installation of my heating system was plagued with problems. At the time of installation the company sent someone who was NOT licensed, which I found out several months AFTER installation. The company had to make about 5 additional trips to straighten out the mess to which one tech admitted he had never seen such a shotty installation job and appeared to be totally disgusted with it. The company has since straightened out their act with qualified personnel.

GE1223 · Feb 15, 2008, 02:23 PM

Just a recommendation that you might find helpful for future referance. You can go to "Angies list .com" and see a list of recommended contrators also check the company out by asking for referrals and ask if their technicians are "N.A.T.E." CERTIFIED. This is simillar to the ASE certification that auto mechanics get. It is pretty tough to get NATE certified, so you have to have a good deal of knowledge to be NATE certified.