How may dollars do you spend in a year for heat/cooling?
In most cases it makes more sense to use the extra $$$ to seal up the house instead of buying a higher end HVAC unit.
I have 2 options:
option 1: SEER 15, EER 12.5, HSPF 8.5
option 2: SEER 16.2, EER 13.5, HSPF 9.0
is there anyway to translate the efficiency into dollars? does anyone have a ballpark figure?
thank you!
How may dollars do you spend in a year for heat/cooling?
In most cases it makes more sense to use the extra $$$ to seal up the house instead of buying a higher end HVAC unit.
You can put numbers on the difference; however, "there are far too many other factors that hinder or contribute to those efficiency numbers that their small rating differences become insignificant."
There are countless ways that the efficiency of heating & cooling a home can be improved whereby the small difference in equipment rating numbers can become relatively irrelevant.
You have far more than two options that can affect the cooling & heating annual utility costs...it might pay you to explore them...
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Generally, I agree with your comment though the price difference is low after all rebates/discounts are applied. That's the reason why the question is purely about efficiency because the cost is not a significant difference but just enough to ask my question...
Thank you.
If one is a 2stage and the other is a single stage there may be comfort differences.
not likely
it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair
Designer Dan __ It's Not Rocket Science, But It is SCIENCE with Some Art. _ _ KEEP IT SIMPLE & SINCERE ___ __ www.mysimplifiedhvac.com ___ __ Define the Building Envelope & Perform a Detailed Load Calc: It's ALL About Windows & Make-up Air Requirements. Know Your Equipment Capabilities
Thank you!
A life cycle cost comparison can help you estimate how much will ultimately be POTENTIALLY saved over the life of the equipment (potentially because it is an estimate, depending on variables that might change in real time). In order to figure this, you need the capacity of the units, the full cost including installation, the annual and occasional maintenance fees, your local energy rates and your location's average heating and cooling degree days.
Quick estimates of savings can be determined just by using the capacity of the equipment, EER, a set amount of hours and local electrical rates.
For instance, 18 ton units with different EER running 1000 hrs (that's 18,000,000 btuh):
1.5 ton 13.0 EER unit running 1000 hrs at $.155kWh will cost $215.18
1.5 ton 15.5 EER unit running 1000 hrs at $.155kWh will cost $179.71
1.5 ton 20.0 EER unit running 1000 hrs at $.155kWh will cost $139.78
Your example using the same size units at 1000 hrs:
1.5 tons 12.5 EER unit running 1000 hrs at .155kWh will cost $224
1.5 tons 13.5 EER unit running 1000 hrs at .155kWh will cost $207
A little more than 7% savings in this example, YMMV.
Keep in mind this example is for a 1.5 ton unit running 1000 hrs.
Your best justification is probably just the fact that the more efficient model is the more environmentally favorable choice.
Also look into incentives for choosing the higher efficiency model, not sure if there are any right now. It varies by location, sometimes your utility company may even offer something.
Good luck finding any air cooled equipment over 14 EER w/o breaking the bank. 12 EER equipment is common and affordable, just one line higher than the builder grade in most brands.
$16 cooling
$72 heating for this example.
Input of city, i.e. Baltimore ... program selects the Cooling and Heating Degree Days (HDD).
One must be responsible for determining program inputs,
whether it be their knowledge of utility rates or determining Old & New equipment ratings.
One always has the option of asking here, i.e. jcnyarch
Heating equipment size deserves thoughtful consideration.
If electric rate is $0.12 /kW versus $0.10/kw used in the example, add 20%.
One can use HVAC OP COST calculator for their situation to estimate $$$ in < 3 minutes. (Attachment)
AND one should NOT get into a lengthy a evaluation period on accuracy.
Obviously, the yearly variations in weather (CDD & HDDs) may have more to do with cost difference
than some of the equipment parameters.
Whoever ( US Air Conditioning Distributors) wrote HVAC OP COST program
provides a valuable, Quick service for reasonable decision making
IF ones uses the program properly. ( ... Disclaimer).
Designer Dan __ It's Not Rocket Science, But It is SCIENCE with Some Art. _ _ KEEP IT SIMPLE & SINCERE ___ __ www.mysimplifiedhvac.com ___ __ Define the Building Envelope & Perform a Detailed Load Calc: It's ALL About Windows & Make-up Air Requirements. Know Your Equipment Capabilities