The cold air at turn-on is leak-through of the 1" (down here) of insulation that surrounds the ducts......not much insulation considering your walls with 2x4 studs have 3 1/2" and your attic 6" or more.
Ducts may not look like it, but the surface area exposed to the cold in the attic for 1' of 13" duct is 3.4' so just a 10' duct run is 34 square feet of area exposed to the cold. That's 5' of wall equivalent with an 8' ceiling for just a 10 ' run of duct. Gonna bet a 6 room house has more like 20' per room for 120' total duct run, obviously some ducts larger, some smaller, exposed with only 1" of insulation.
Leaving the blower on, not only keeps the room temp averaged out, it also keeps the ducts warmed up to the average temp of the rooms so no cold starts.
Additionally leaving the blower on keeps the temperature passing the thermostat at more of an even level meaning that you don't have these big changes in room temp before it kicks on.
The amount of electricity to run the blower is nil. Down here for a quick example, a 2 ton (24,000 BTU AC/80,000 BTU furnace) unit runs a 1/3 hp blower. Throw in some efficiency numbers and that's about 1/3 of a kilowatt hour per hour plus losses for about 1/2 kWHr/hr.
Currently paying 13 cents per kWHr at my house. So 7c x 24 hrs x 30 days = $5 per month. But wait. Subtract out the time the blower runs anyway and it's maybe half that.
So, as I see it the "efficiency" setting you see on things like air conditioners where the fan is off is an absolute joke. What do you do to stir the air up.....turn on the ceiling fan......what did you gain?
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
