advertisement
Forums

The Forum is sponsored by 
 

AAPL stock: Click Here

You are currently viewing the Tips and Deals forum
HVAC Resource Forum (HRF) - which system to get?
Posted by: clay
Date: September 10, 2019 01:32PM
Have a ~25 year old heat pump. Been nickel and diming parts and repairs for the past few years. Been considering replacement on our own terms, rather than mid-January in 10 degree weather or mid-July in 100 degree/75% humidity weather.

I've got a couple more estimates coming, but just got one from the company I like best, and just wanted a gut check on which route is likely to make the most sense for us.

  • 15 SEER unit - single speed compressor + indoor blower unit + thermostat + install + 1 yr labor/10 yr parts warranty ~$5500
  • 17 SEER unit - 2 stage compressor + indoor blower unit + thermostat + install + 1 yr labor/10 yr parts warranty ~$7500
  • 18 SEER unit - variable speed compressor + indoor blower unit + thermostat + install + 2 yr labor/10 yr parts warranty (12 years for compressor) ~$8500

They could give us pricing on 14 SEER units on the low end, and 20 SEER on the high end as well, FWIW.

A few items for consideration:
  • We are likely to be in the house for at least 10 years
  • We have PV solar, so our normal electric bills are low/non-existent in spring-fall. Winter we are still generating of course, but typically not enough to cover the monthly bill (maybe 4-5 months). So perhaps a $100 electric bill in those months, but very low/no bills the other 7-8 months.
  • Our appliances are entirely electric -- no gas/oil/etc.

So perhaps the question is two-fold:

1. How much efficiency is worth paying for in a heat pump? I'm sure there's a calculation that would give a clear answer. Is it a function of cost of electricity? or is it a function of the expected usable lifespan of the unit?
2. Our old heat pump is single speed. What do we know about reliability of 2 stage and variable speed compressors? Run away fast? Or embrace them as a natural advancement in compressor technology?

This is not a "done deal". Possible we will wait until spring, but wanted to at least get some numbers to see what the possibilities are. Looking for your experiences and recommendation. thanks!



Edited 1 time(s). Last edit at 09/10/2019 01:34PM by clay.
Options:  Reply • Quote
Re: HVAC Resource Forum (HRF) - which system to get?
Posted by: Ombligo
Date: September 10, 2019 02:20PM
i'd likely go with the 15 SEER. The higher ratings are most likely not going to pay you back. Over a period of 10 years, the savings between the 15 & 17 is only $800 (assuming a 3-ton unit, less if the units are smaller and a bit more if larger).

SEER Savings Calculator



“No persons are more frequently wrong, than those who will not admit they are wrong.”
-- François de La Rochefoucauld

"WE CALL BS!" -- Emma Gonzalez
Options:  Reply • Quote
Re: HVAC Resource Forum (HRF) - which system to get?
Posted by: jh
Date: September 10, 2019 02:32PM
We replaced our old heat pump single speed unit with a two stage unit several years ago and are pleased with it. Recently installed a nest thermostat. The electric has gone down with the two stage unit.
Options:  Reply • Quote
Re: HVAC Resource Forum (HRF) - which system to get?
Posted by: mikebw
Date: September 10, 2019 02:54PM
I would go with the 18. Not a huge performance difference energy-wise, but from what I have heard about variable speed compressors I think the more consistent comfort level will be worth it.
Options:  Reply • Quote
Re: HVAC Resource Forum (HRF) - which system to get?
Posted by: DinerDave
Date: September 10, 2019 03:36PM
I learned a LONBG time ago, you get what you pay for. The low end will have a better cost of entry, but long term, I feel getting a higher capacity unit is best. I don't like to have something "to get you by".
A slightly more powerful unit wouldn't work as hard or strain under the occasional higher load.

Glad to hear you have solar. Lovin' mine!

Dave



Welcome to Dave's BBQ!

Many have eaten here....

Few have died
Options:  Reply • Quote
Re: HVAC Resource Forum (HRF) - which system to get?
Posted by: Bill in NC
Date: September 10, 2019 03:59PM
You'll want the variable speed blower fan (inside)...if that's included in the SEER 15 quote go for that.



Edited 1 time(s). Last edit at 09/10/2019 03:59PM by Bill in NC.
Options:  Reply • Quote
Sorry, only registered users may post in this forum.

Click here to login

Online Users

Guests: 298
Record Number of Users: 52 on November 20, 2014
Record Number of Guests: 2330 on October 25, 2018