Appearently I do not have good luck with being able to heat a house.
This is the second house I have had that I have heating problems with
In March of this year we replaced our really drafty wooden double
pained windows. We installed 3 pane shucos with lowE and argon.
Besides not being able to open we replaced them since they leaked and
in the winter the house still had a chill.
Now here is the problem.............
(0) We have a natural gas lennox for heat.
(1) We have made no other changes to the house other than windows.
(2) Gas usage has doubled for same month last year.
(3) Electric has also doubled since I have been using a space heater in
living room to stay warm and to prevent heat from turning on.
(4) I have been documenting how often the heat turns on and off. When
it turns on it usually stays ON between 5-10 minutes regardless of the
time of day. However the cycle time (from Off to On) changes
considerably. During the day it is about every 10 minutes, then it
slowly decreases to every 5 minutes and then it becomes every 1 minute.
(5) Between around 10 am to about 6 pm it is every 10 minutes cycle
time. From about 9 pm till about 8 am it is a 1 minute cycle time. All
other times are about 5 minutes.
(6) Last year during winter I payed attention to how often it cycled on
and off it was always around a 10 minute cycle time. I remember since I
had heating problems in my previous house.
(7) We had heating company come out this week and they found no
problems. They checked the temperature between the in and out and the
difference was 45 degrees. For this unit the range is supposed to be
Any suggestions on what may be causing this? I have an appt for next
tuesday for another tech to come out to do some more extensive
* note: the cycle times i mentioned in (4 and 5) is a range. I do not
mean to say there are only 3 cycle times, but these are the most
I have not yet checked that but I plan on it hopefully this weekend.
However I do know that last year even in the coldest day of the year my
never cycled on 1 minute after it turned off.
Yesterday the high was 45 and the low was 31.
What kind of insulation do you have on your house? Walls, ceiling,
basement walls, etc. and is walls 2x4 or 2x6 construction?
IMO, first thing you do is energy assesment of your house ie. let expert
come out and go about your house to see where the heat loss(leak) is
occuring. Where I live it costs 150.00 to do thorough job with a written
report. Local gas company does this service. Or you can take a IR
picture of your house which will show the area of heat loss.
Not sure on wall insulation or construction.
House is entirely brick with a dining room addition which is not brick.
The attic insulation includes some sort of recycled newspaper with it.
So this would be good to replace.
But the attic insulation was the same last year as this year.
Is there a particular name which I could search for which does this
I checked with my gas and electric about 3 yrs ago and they do NOT
offer this sort of service.
I know in Florida my moms electric company did do this sort of thing,
but where I live the utilities do not.
Check the basics first. Start with your thermostat. See if it is
working correctly. It could be the reason why your furnace is cycling
a lot. There is usually a heat anticipator setting which controls the
cycling of the furnace. The higher the setting, the longer the cycle
What kind of heat do you have, hot water baseboard or forced hot air?
I have forced hot air. I plan on buying a cheapo thermostat this
weekend to see if that changes anything.
I have a Honeywell (square shaped) T86 programmable. (I am not 100% on
the model since honeywell support site is not responding).
If I can find the right model and instructions I will see if the cycle
rate can be changed. but as mentioned I will get a cheapo and try that
out to rule out thermostat.
You also might want to try ( if you can) increasing the run time of
your fan after the burners shut off. On my Trane, it was factory set at
I think a minute or so. I was able to flick some dip switches on the
control board so that the fan remains on for 2 1/2 minutes after the
burners shut off. Doing this lets the fan blow some warm air a little
Again, I don't know if you can do this on your Lennox. Check the
operating manual or the schematic.
What about water heater, cooking, laundry and bath use are they the
same, and water heater temp and efficiency, you flushed it and checked
the flame and it is burning good. What is R value of new windows vs old,
Usualy it is very little going from a dual pane Low E argon to triple
pane apx 1.5R or equal to 1/2 " fiberglass insulation. What is attic R
value or thickness. Was furnace cleaned. We had a record cold December
so far here in the midwest.
I dont know the old R value but they are original windows when the
house was built in the 60s. So i suspect it did not have lowE or argon,
but probably just air.
As far as water heater and such I will check the gas usage for last
year and this year in non-winter months to see if maybe that is where
the extra gas is going (but as i said the heater is cycling fast so i
am sure that is where the extra therms are going). However that is a
good suggestion to check the other gas appliances as well.
attic R have no idea. i believe it is same insulation from when house
was built in 60s. I have not had the furnace cleaned but I had it
inspected last year and this year. I believe the tech from the heating
company will open the system up more to check for blockages and such.
Do heat loss calc....
Here is my house heat loss:
What would my savings be if I replace standard windows with LowE?
Probably $1 - 2 on every $100 spent on heating....
Before replacing windows see if savings are there...
Also price of gas of our GasCo went up 36%....
Last november heating degree days were 369 @Indy
This november: 493
Your bill doubled? Possible...
Your present thermostat likely has a setting for swing or an
anticipator, but cycling may be the furnace itself, you havnt had it
cleaned or serviced so do that first.
You say your bill doubled in price well sure your gas is up 43% and its
a cold December, and you never cleaned your furnace or had it serviced.
Look at your attic and measure it and figure 3.5R per inch. It depends
on where you live but R 35 is not optimal in the midwest R 50-60 is, I
have alot more than that.
Have you done the obvious and compared the weather from last year to this year?
a lot colder this year, you're going to see higher utility bills. You can't
months and assume they're going to be the same from year to year.
The easy way is to track degree days. Our newspaper has them listed on the
weather page. Here in CT, it seems very cold, but we are still behind
"average" for the year, but we are ahead of last year. Our perception of
how cold it is is often thrown off by a very cold spell and we may forget
the very mild time. The thermometer is more true.
Try setting the thermostat anticipator setting for a system that uses
hot water radiators since that will cause it to cycle on and off less
often. I also wonder if you have a vent near your thermostat.
I have just replaced the thermostat with a new honeywell CT31 to see if
it makes a difference.
Thus far the last 20 minutes the system is cycling on and off about
every 2 minutes.
It is 42 degrees out right now.
You mentioned to change the anticipator setting. This model has
some adjustment which I assume is what you mean. I set it to 0.4.
Are you recommending I change it 0.8?
Is this the temperature drop at which it turns on or when it turns off?
gas/oil furnace 0.4
electric furnace 0.3
high effic. furnace 0.8
hot water 0.8
gas/oil steam system 1.2
It does seem odd that your house would cool off fast enough for the
heat to come on 2 minutes after it shuts off!
Have you plugged the hole in the wall behind the thermostat where the
wires come through? Maybe with the new windows the air infiltration is
greater through that hole now & the cold air is cooling the thermostat
causing faster cycling times.
should actually be CROCKydile, and I also
respectfully submit that many of you have just been hooked on a
troll line. A mental comparison, without any real work involved,
says to me that this is an imposter and has posted here under
several other names in the recent past. Hasn't AnyONE NOTICED a
similarity to any of this kind of post?
Good grief Charlie Brown! <g>
Have fun mates!
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