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how much more efficient is my new furnace/ac?
I have an older AC/Furnace unit that i'm in the process of replacing. The old unit was considered too small for the house and was on the low end of the energy efficiency scale. The one i'm getting is very effecient (96% furnace and 16seer ac unit) and is 3 ton instead of 2 ton. I'm thinking the electric/gas bill won't be too much different, but does anyone have any experience with this and what I can expect in savings? Despite it being a gas furnace, will the blower be more electrictally efficient?
4 Answers
- ?Lv 58 years agoFavorite Answer
A/C and Furnace manufacturers are always improving the efficiency standards of their products. If it's even just 1 or 2 years newer the efficiency standards should be way better.
- Anonymous8 years ago
First off, If you are going from a 2 ton to a 3 ton that is a a HUGE difference. Someone messed up big time when sizing your equipment. If the 3 ton unit is for sure the appropriate size for your home then the previous unit was extremely undersized.
Also, If your previous unit was around 10 years old then its probably around 10 seer. Most units around 10 years of age were somewhere around 60-80% efficient. Your new unit being a 16 SEER will be much more efficient and probably use 25% less energy than the old one. Further, your new inside unit will probably use 15%-25% less gas than the old one. In other words, you should see utility savings in the 25% range on both gas and electricity.
Further, is your fan variable speed? If its not variable speed you are going to use the same amount of electricity to run the motor in the furnace as your previous unit. However, if it is variable speed you will be using less energy to run the fan and it will also be quieter.
Bottom line, you should see savings in both gas and electricity. And if in fact your unit is properly sized, your system should run smoother, better, and last longer. Make sure to get on an ANNUAL maintenance plan! Your new system will last longer be healthier and perform better with an annual maintenance.
Also, if your system does not have an Air Scrubber, I would highly recommend one. They are a new technology that keep your system and the air in your home clean. Here is the link along with an in depth informative brochure you can read: https://www.1hourheating.com/microguardian/
-Miller's One Hour Heating & Air Conditioning
Source(s): https://www.1hourheating.com/ Have more questions? http://www.youtube.com/millersonehour - 8 years ago
Older units with a standard efficiency (depending on the age) were typically 70-79%.
You would be improving your efficiency as much as 26%.
A word of caution though, typically ductwork systems are designed and installed to fit the relative size (tonnage) of the unit.
Only a step up or down of a half a ton is recommended.
Anything more than this could cause static pressures inside the ductwork to be too high causing loss of efficiency and cooling capacity during peak load intervals.
Source(s): 12+year HVAC Tech - Greg DLv 58 years ago
Really depends on what make and model you are installing. If you're installing a variable speed blower furnace, then you will see saving on electric and gas.
Gas is easy to calculate. If you had a 70% efficient furnace and then installed a 95% efficient furnace your saving will be around 25% for the year to heat your home.
For a/c you may save around 25% on the electricity used to cool your home.
