Heat pump....Cost to run....Heat vs air conditioning?

mark40511May 3, 2010


Say you have a 5 year old Trane ten seer heat pump

Take a COLD day with daytime high's in the 20's and low's in the single digits.

Then take a HOT day with Daytime highs around 90.......Low around 70

Which uses more energy....The air conditioning or the heat?

Thank you for reporting this comment. Undo

Heating, hands down in that scenario. You would almost certainly have the heat strips on, assuming the system uses that type of auxiliary heat.

    Bookmark   May 3, 2010 at 7:31AM
Thank you for reporting this comment. Undo

Even without using heat strips, you require (in general) more btus for heat. Look at the delta Ts (difference in temp between indoor and outdoor) and see what I mean. Now - real world doesn't work exactly that way because windows bring in heat from the sun and people generate heat and electronics generate heat. But you are comparing a 20 degree delta T to a 50 degree delta T. The insensible heat gains might be worth 10-15 degrees so heating will still use more BTUs.

    Bookmark   May 3, 2010 at 3:10PM
Thank you for reporting this comment. Undo

hvac 20 yrs old,ac leaking badly.even pay elect $113 and nat gas $71 per month(include household power well,gas water htr),looking at new system 15 seer and 96%variable speed furnacefor about$12K. someone sad check ground water heat pump, est:$18k how much m,ore efficient is ht pump for payback live in western iowa. which do i get

    Bookmark   July 12, 2011 at 10:28PM
Thank you for reporting this comment. Undo

It'll certainly, on average, cost more to heat than cool. A lot of areas now impose summer electrical rates which are higher than winter rates so they may be close. As for determining the cost effectiveness in relation to higher initial costs of higher SEER ratings, there may be more sizzle than steak. Compare the increase in energy savings with the higher efficiency units as opposed to the actual higher cost of a higher efficiency unit. The expected life cycle on a unit is 10 years so figure the energy savings you will experience in your area and see if it will shadow the initial and ongoing maintenance costs. Keep in mind the newer units also have a maintenance schedule that will be required by most companies, which is going to increase those costs. If your energy savings is more than the overall cost of the unit in a 10 year period, then it's worth it. But for the most part, I think you'll find it won't.

    Bookmark   July 12, 2011 at 11:00PM
Sign Up to comment
More Discussions
Central Air OR Mini-Split
Hello everyone, We bought our house 2 years ago (1938...
Honeywell th6320R Thermostat
My Honeywell TH6320R thermostat (communicating with...
Seeking input on HVAC replacement
I am getting ready to do a full replacement. Current...
2 HVAC quotes: need to decide
I'm ignorant of HVAC, but willing to do the research...
Advice on Attic insulation
So we just finished the second year in our house and...
Sponsored Products
52" Minka Aire Aluma Flat White Ceiling Fan
Lamps Plus
Anywhere Fireplace Tribeca II Ventless Fireplace
NuTone Ceiling Fans Commercial Series 56 in. Indoor White Ceiling Fan CFC56WH
Home Depot
Stainless Steel Double-bowl Kitchen Sink
Peri Opal Matte Bronze Sconce
$166.50 | Bellacor
Area Rug: Magi Sheeba Flex 2' x 3'
$89.97 | Home Depot
4" IC Air Seal New Construction Recessed Light Housing
Lamps Plus
Adagio Cottonwood Falls Wall Fountain Black Spider Marble
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™