Yes. there is a number to quantify.

If you already have one, please share with us.

Thanks.

Already share. Pls read back.

Heard that inverter does not require 13A wiring anymore.. anybody can confirm?

Noted and thanks.

I need to compare the saving with the total cost (ac, installation, refrigerant, cleaning, etc ).

Yes, I can be picky at times. Ha.

Cheerio.

Got some data from an ac manufacturer. Still need the following infor if you have:

a. cost of 2 HP normal ac
b. cost of 2 HP inverter ac
c. installation cost for normal ac
d. installation cost for inverter ac (needs thicker pipe for the higher pressure)
e. refrigerant cost - R22 (normal) & R410A (inverter)

Cleaning cost for the 2 types will be about the same as per the manufacturer.

With the above, I can then calculate the breakeven point and share the finding here. Not rocket science accuracy but what you have paid will do.

I am from Sarawak and we pay 31 cents /kwh here. How much is 1 kwh in W M'sia?

Many thanks.

P/S Instead of individual split units, any one here using centralised system? Why? One bigger compressor should be cheaper than 3 or 4 smaller compressors. Yes, cheaper but one will loose out on availability-reliability.

Called a supplier and got some infor for my calculation.

It does not look good with more than 8 years to break even.

Even when there is no additional costs in installation and diff refrigerant, the payback is after 7 years.

Maybe I have used wrong data or something is not right with my cals.

Your view?

Thanks.

P/S Tried another case with twice the energy saving at 40% and 15 hrs /day operation, the payback is after 3 years. But is 40% saving realistic?

I use actual scenario. Compare old bill and after install use bill. Old non inverter unit and new inverter unit.

Your saving works out to be 40/110 = 36% (= energy saving).

What is the temp setting you used while using the :
* old ac and
* the new ac?

The manufacturer I called said that the saving will be greater when comparing the 2 ac running at low temp, 20 C or below. Less saving when at higher temp, e.g. 25 C.

Cheerio.

Have you factor in time to come R22 gas refill will be more expensive? Is like car a/c gas now try to refill the old gas is getting expensive.

Old = 18-20c
New = 24-25c

What manufacturing is that? The higher temperature make the aircon work lesser. The lower the temp, the aircon need to run max. We have a hot weather out there.

The comparison was on 2 ac (non inverter and inverter) both operating at low temp. It will be more energy draining for the non inverter at low temp than the inverter.

Yes, agree that the higher the temp setting, easier it is for the ac to operate and thus less energy consumed.

Your saving of RM40 may be partly due to the higher temp setting you used and the other part due to the inverter.

Cheerio.

Yes, the company I called mentions RM400 / bottle for the new refrigerant and RM100+ for the old refrigerant.

In my comparison, I used RM50 delta for the refrigerant.

Cheerio.

There is an interplay between your choice of A/C brand and the 2 factors here.
i.e.: Daikin has a R22 inverter model ...if you opt for that one, you don't need a thicker pipe and don't need to use R410a, which is still more expensive.

The old non inverter is 1HP and need lower temp setting to achieve my comfort level. While the inverter 1.5hp need only 24-25c temp to achieve my comfort level. So it doesn't makesense for me to lower till 18-20c and sleeping in shivering. And even the inverter is 1.5hp, it still save than the 1hp non inverter.

Each mth I save rm40 and yearly rm480. Should I get the non inverter to save the initial cost?

My inverter is using R410a gas. Consider most expensive gas. But 5yrs of using, didn't need to top up at all.

And even I need to top up back after 5yrs, the saving is more than enough for me to pay.

I did not follow much on a/c pricing since i move. What is the price of Panasonic inverter vs Daikin R22 inverter, what are the price difference, and can the price difference use for compensate the piping cost?

my real life data: setting 28°C DRY mode (makes air feel less hot), AC run 24/7.

non inverter carrier with 10.x (cant remember) efficiency

inverter: panasonic econavi

savings over four years vs. non-inverter is substantial: 55% less power consumption on AVERAGE.

so i guess you can for sure use 40% savings. your mileage should be LESS than mine because the initial cooling down of the room is not so efficient. you will probably have max gain when you A/C with comparatively high settings 24/7

oh and gas: normally you will not have to top-up. its a closed system. there is something wrong if you need to topup.

I'm not sure of the price either, but there isn't a significant delta last I recall. 1 HP for either model should be around the RM1300 price range. I think Daikin's R410a models are more expensive.
IMHO, if you have an existing R22 piping installation, you can save money now just upgrading with Daikin's R22 inverters. If your house is brand new with no piping, no harm future-proofing with a R410a installation.