HVAC-Talk: Heating, Air & Refrigeration Discussion banner
1 - 20 of 20 Posts

thedude99

· Registered
Joined
·
9 Posts
Discussion starter · #1 ·
Hey guys. I'm trying to understand the higher electrical usage year over year in my house. I am using on average 6 Kwh more per day compared to this time last year. A few things have changed

My wife started working from home about ten months ago and she is on the computer all day in relation to that. Living up north it is also very dark much of the day and with an additional person home there would be more lights on and the furnace temp is set to 68 compared to 59 when she is not home. Having said that - I would have seen increases in electricity over the summer months too compared to prior year as she worked from home last summer whereas the one before she didn't. There were increases but not the 6 or so extra Kwh I saw in winter. From what I know, laptops draw very little power and bulbs aren't huge energy consumers (although i still have incandescents). Oh....other thing is she sells dresses on the side on Etsy using a serger and sewing machine and that use has gone up too

The two other things that changed were that I ran the built into furnace Wait 6000 humidifier this winter whereas I don't recall doing it last year. Also I ran a stand alone cool mist humidifier for half of this year's winter. Lastly I got a new furnace - a York Tm9x which I was told had a highly efficient ECM motor in it. This was an upgrade to my 25 year old Lennox which was making odd sounds at the end of last year and everyone told me it was better to replace rather than repair especially due to the 'energy savings'. My gas usage this year was abit lower then the previous year despite the wife being home as I mentioned so i suppose it was more efficient on nat gas usage - hard to say really. This was also a much milder winter compared to the prior year (Western Canada).

So my long winded question is......could the new furnace fan be causing the spike in electrical usage? I am hoping the other factors mentioned are explaining the increase. Might seem petty but our electric rates are high here and this is another $15 to $20 on the bill every month. Should I contact my installer to have them take a look and perhaps adjust the fan speed or something? Or did the other things I mention explain away the increase.
 
X2 on what TB said. i think it is all the things going on during the day that before was in setback. Not knowing where you are at, the wild winter could also add to that usage.
 
Save
Other things I have found that cause power bill to go up:

Clothes dryer. I started throwing my bath towel in the dryer every morning to eliminate mildew. It worked great, but that extra 10 minutes a day showed up on the bill.

Heating pad and space heater. I have used these in the past to make up for lower thermostat settings, but the electricity used by these very small appliances cost more than the gas I had used to heat the whole house. (I used a space heater one winter and a heating pad the next.)
 
Save
ECMs will consume more power than the dumb motors they replace if you have poor ductwork, since they will ramp up speed, and thus power use, to force the airflow through.

could be a hot water leak somewhere. had a customer thought their hp was issue, saw wh leaking in crawlspace when was checking indoor section of heat.
 
Save
Just a thought a year a go I did a change out at a house from a air to air Coleman to a high efficiency climatemaster water source . Home owners were complaining about high power bills before install. During the install we found a old filter that had fallin down in the duct work in a hard to see place . Good thing we did a manometer test after our install and found out there was an issue somewhere. Home owners are very happy right now .
 
Sure - it could be the furnace. Although not likely the blower.

What is the accurate heat loss calculation on the house?

What is the heating capacity of the new furnace?

What are the cycle times of the new furnace?

PHM
--------------




Hey guys. I'm trying to understand the higher electrical usage year over year in my house. I am using on average 6 Kwh more per day compared to this time last year. A few things have changed

My wife started working from home about ten months ago and she is on the computer all day in relation to that. Living up north it is also very dark much of the day and with an additional person home there would be more lights on and the furnace temp is set to 68 compared to 59 when she is not home. Having said that - I would have seen increases in electricity over the summer months too compared to prior year as she worked from home last summer whereas the one before she didn't. There were increases but not the 6 or so extra Kwh I saw in winter. From what I know, laptops draw very little power and bulbs aren't huge energy consumers (although i still have incandescents). Oh....other thing is she sells dresses on the side on Etsy using a serger and sewing machine and that use has gone up too

The two other things that changed were that I ran the built into furnace Wait 6000 humidifier this winter whereas I don't recall doing it last year. Also I ran a stand alone cool mist humidifier for half of this year's winter. Lastly I got a new furnace - a York Tm9x which I was told had a highly efficient ECM motor in it. This was an upgrade to my 25 year old Lennox which was making odd sounds at the end of last year and everyone told me it was better to replace rather than repair especially due to the 'energy savings'. My gas usage this year was abit lower then the previous year despite the wife being home as I mentioned so i suppose it was more efficient on nat gas usage - hard to say really. This was also a much milder winter compared to the prior year (Western Canada).

So my long winded question is......could the new furnace fan be causing the spike in electrical usage? I am hoping the other factors mentioned are explaining the increase. Might seem petty but our electric rates are high here and this is another $15 to $20 on the bill every month. Should I contact my installer to have them take a look and perhaps adjust the fan speed or something? Or did the other things I mention explain away the increase.
 
Save
Don't forget the opening and closing of the refrigerator door when she goes for breakfast, lunch, snack, drinks etc. Is she brewing coffee or heating water for tea? Are you on a well? Toilet being used more frequently will cause pump to run more often.

My guess is, her being home is costing you money. Send her back to work.:whistle:
 
Save
Hey guys. I'm trying to understand the higher electrical usage year over year in my house. I am using on average 6 Kwh more per day compared to this time last year. A few things have changed

My wife started working from home about ten months ago and she is on the computer all day in relation to that. Living up north it is also very dark much of the day and with an additional person home there would be more lights on and the furnace temp is set to 68 compared to 59 when she is not home. Having said that - I would have seen increases in electricity over the summer months too compared to prior year as she worked from home last summer whereas the one before she didn't. There were increases but not the 6 or so extra Kwh I saw in winter. From what I know, laptops draw very little power and bulbs aren't huge energy consumers (although i still have incandescents). Oh....other thing is she sells dresses on the side on Etsy using a serger and sewing machine and that use has gone up too

The two other things that changed were that I ran the built into furnace Wait 6000 humidifier this winter whereas I don't recall doing it last year. Also I ran a stand alone cool mist humidifier for half of this year's winter. Lastly I got a new furnace - a York Tm9x which I was told had a highly efficient ECM motor in it. This was an upgrade to my 25 year old Lennox which was making odd sounds at the end of last year and everyone told me it was better to replace rather than repair especially due to the 'energy savings'. My gas usage this year was abit lower then the previous year despite the wife being home as I mentioned so i suppose it was more efficient on nat gas usage - hard to say really. This was also a much milder winter compared to the prior year (Western Canada).

So my long winded question is......could the new furnace fan be causing the spike in electrical usage? I am hoping the other factors mentioned are explaining the increase. Might seem petty but our electric rates are high here and this is another $15 to $20 on the bill every month. Should I contact my installer to have them take a look and perhaps adjust the fan speed or something? Or did the other things I mention explain away the increase.
If the old electric furnace (assuming it is electric) was never energizing all of its elements , then a new furnace that does....could contribute to higher useage dependant on the load, outside weather conditions, thermostat setting, etc....

Further, you might be operating other electrical equipment more than you have in the past which is upping your bill . Finally, yuou should have the Installer return to setup the furnace / Heat Pump for maximized economy making sure the system is 'staged' properly .

If the system is gas , then I wouldn't expect a huge reduction in electricity from more efficient fan motors . In fact, when your ECM motor eventually fails, the replacement is going to wipe out allllll your savings plus some . They have a ways to go before they are considered highly-reliable.
 
Discussion starter · #16 ·
Yes system is gas

Was bored at work today. Compared year over year natural gas usage for the months of November to February and per day Gj usage with new furnace was 0.38 compared to 0.46 last year and 0.52 year before that. So at least i'm saving on the gas side!

Since i bought this system less than a year ago, I presume it's kosher to ask hvac installer to come have a look? Is there not anyway to measure the power it's using. I was thinking perhaps i can watch my meter over a 24 hour period and compare? Tomorrow will be coolish here whereas on the weekend quite warm and the furnace would run way less...
 
Discussion starter · #17 ·
If the old electric furnace (assuming it is electric) was never energizing all of its elements , then a new furnace that does....could contribute to higher useage dependant on the load, outside weather conditions, thermostat setting, etc....

Further, you might be operating other electrical equipment more than you have in the past which is upping your bill . Finally, yuou should have the Installer return to setup the furnace / Heat Pump for maximized economy making sure the system is 'staged' properly .

If the system is gas , then I wouldn't expect a huge reduction in electricity from more efficient fan motors . In fact, when your ECM motor eventually fails, the replacement is going to wipe out allllll your savings plus some . They have a ways to go before they are considered highly-reliable.
Yea it's funny the installer never mentioned that!!! I did have a post up here last year asking about this furnace and received fairly positive replies
 
Have one question for the OP.

Do you have a car garage?

If not, I bet the wife keeps the Camry plugged in those 9 hours that she would have had been working.

That 500w block heater would add 4.5kw spin to your meter per day.
 
1 - 20 of 20 Posts
You have insufficient privileges to reply here.