ac guys

[tmacbow]

Does changing the condensers from old to new and bigger make it more efficient.. Thax

[gusman]

Yes if system is sized correct, indoor evaporator coil needs to match condensing unit tonage.

[critter69]

Yes if system is sized correct, indoor evaporator coil needs to match condensing unit tonage.

If you install a bigger condensor and the indoor coil is to small you are asking for trouble.

[creedkiller]

The outside unit needs to be smaller then the inside to.be efficient

[JEG8233]

By bigger are you talking SEER rating or capacity, i.e. 2, 3, 4 ton?

[tmacbow]

So if its a two ton and I but a five I'd have to change unit in the house??

[JEG8233]

So if its a two ton and I but a five I'd have to change unit in the house??

Yes. If you had a two ton currently and went back with a five ton, not only would you need to change evaporator coil but also the furnace if gas. If heat pump or straight electric heat you'd have to change out air handler.

And if going up in capacity you need to also look at upsizing the supply and return duct work.

[tmacbow]

Yes. If you had a two ton currently and went back with a five ton, not only would you need to change evaporator coil but also the furnace if gas. If heat pump or straight electric heat you'd have to change out air handler.

And if going up in capacity you need to also look at upsizing the supply and return duct work.

That I think I get it now!

[ballisticbudda]

Does changing the condensers from old to new and bigger make it more efficient.. Thax

Not if you left the old evaporator coil in place. The driving factor in SEER (seasonal energy efficiency rating) is having large coil surfaces in order to expel heat to the outside (condenser) and a large surface for the evaporator in order to absorb heat from the conditioned space. Many companies have taken to using an evaporator coil that has very small spaces between the fins in order to achieve higher SEER ratings.

Other things to take into consideration is if the indoor blower motor is an ECM motor or a PSC. The more energy efficient units will use ECM inside and out along with thermal expansion valves as metering devices.

You may have issues with liquid floodback to the compressor. Better to have a matched set (air handler and outdoor unit).

Just my .02, time to get back to lecturing.

[tmacbow]

Not if you left the old evaporator coil in place. The driving factor in SEER (seasonal energy efficiency rating) is having large coil surfaces in order to expel heat to the outside (condenser) and a large surface for the evaporator in order to absorb heat from the conditioned space. Many companies have taken to using an evaporator coil that has very small spaces between the fins in order to achieve higher SEER ratings.

Other things to take into consideration is if the indoor blower motor is an ECM motor or a PSC. The more energy efficient units will use ECM inside and out along with thermal expansion valves as metering devices.

You may have issues with liquid floodback to the compressor. Better to have a matched set (air handler and outdoor unit).

Just my .02, time to get back to lecturing.

I do not take any response a lecture I find it helpful or I wouldn't have ask the questions on here

[dwdaffan]

If you are going from a two ton to a five. The first question I would ask is why? If it is not sized properly you are asking for more trouble. And efficiency won't matter anyway. Bigger is not always better.

[LWolken]

So if its a two ton and I but a five I'd have to change unit in the house??

Yes, along with a new duct system matched to the flow capabilities of the new air handler/furnace one other issue is that the electrical service may not be large enough for the 5 ton air handler (electric heat) and the 5 ton outdoor unit will require larger electrical service. Also the copper line set will most likely need to be replaced going from a 2 ton to a 5 ton.

[tmacbow]

To all that comment I'm grateful for the information
I'm lookin to lower my bill by not spending a lot I have friends that get them hardly used....

[krisw]

I'd be worried about cooling to fast and not getting the moisture out of the air.

[JEG8233]

To all that comment I'm grateful for the information

I'm lookin to lower my bill by not spending a lot I have friends that get them hardly used....

Cheaper ain't always better when it comes to HVAC.