[steve wright]

I am not as knowledgeable in modern residential equipment as many of you are.

It is time to replace my heat pump, it is an 80% 13 seer hybrid HP.

I can do all the cost savings payback calculations, what I want to know should I go with 90+ hybrid system or go to a traditional HP. Reliability is the main concern.

Thank in advance

 

[jbhenergy]

I am not as knowledgeable in modern residential equipment as many of you are.

It is time to replace my heat pump, it is an 80% 13 seer hybrid HP.

I can do all the cost savings payback calculations, what I want to know should I go with 90+ hybrid system or go to a traditional HP. Reliability is the main concern.

Thank in advance

Lp or Nat gas?

Lp dual fuel
Nat just Nat gas

Based on prices in my area


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[steve wright]

LP are the 90 plus reliable, it in a crawl space, read some comments about secondary heat exchanger stopping up.

 

[theoldscroll]

LP are the 90 plus reliable, it in a crawl space, read some comments about secondary heat exchanger stopping up.

In Georgia does the cost difference add up in your calculations from 80% to 90? Run time on the gas furnace will be virtually nothing I would think.

 

[steve wright]

In Georgia does the cost difference add up in your calculations from 80% to 90? Run time on the gas furnace will be virtually nothing I would think.

Not really since like you said it will be on HP most of the time.

For the rest of the story we are encapsulating the crawl space so we will not have adequate combustion air for the 80% furnaces, need something that will bring combustion air from outside. That is why Im considering going back with conventional HP.

 

[theoldscroll]

Sealed combustion 80% are easy enough to find, but it sounds like you've already convincd yourself. How many days do you get below 20 degrees?, I know people in Florida who pull out "new" furnaces when they replace systems.

 

[doc havoc]

Reliability is the main concern.

If this truly is the main concern, all electric is probably your best option. There's just not as many things that can go wrong.
You start talking 90+% furnaces and now you have flame sensors, pressure switches, induced draft blowers, gas valves, roll out switches etc. that can fail. A stopped up condensate drain can create a no heat situation. A birds nest, bee hive or critter in the intake or exhaust can create no heat. So not only do you increase your chances of failure due to the many added components, but there are external factors as well.

 

[James Colver]

If this truly is the main concern, all electric is probably your best option. There's just not as many things that can go wrong.
You start talking 90+% furnaces and now you have flame sensors, pressure switches, induced draft blowers, gas valves, roll out switches etc. that can fail. A stopped up condensate drain can create a no heat situation. A birds nest, bee hive or critter in the intake or exhaust can create no heat. So not only do you increase your chances of failure due to the many added components, but there are external factors as well.

x2

Keep in mind that you'll also have predictability too. When gas prices shot up in 2008 the cost of oil and propane also greatly increased over night. With electricity you're going to be using a heavily regulated fuel source and they cannot double the cost of the fuel overnight like propane could

 

[steve wright]

Thanks, you guys convinced me I will be going with a conventional HP system. Our ASHRAE design is above 22*F we have 6” well insulated walls and 12” ceiling.

Your comments really changed my mind!