I am replacing my furnace and air conditioner in the near future. I will be purchasing the following Goodman system:
Furnace: 95%, variable DC fan, 2 stage, 90,000 btu Goodman GMV950905
Air Conditioner: 2.5 ton, 14 SEER (15 SEER with coil and furnace combo), R410A, Goodman SSX140301 (ARI # 3000063)
Humidifier: Currently installed Aprilaire 550
Air Cleaner: Currently installed Electro Air SS-10 EAC (may be changed, see below)
I still have questions on my air cleaner choice as well as on my thermostat after speaking to my chosen contractor (who I chose after considering referrals and quotes by several contractors).
I am not sure if my current Electronic Air Cleaner (EAC) is operating properly and what the airflow (cfm) of my new system will be to properly size a new filter system if needed.
The previous home owner installed an Electro Air SS-10 EAC. Problem is this unit is rated for up to 1200 cfm air flow (recommended for a house up to 2400 sq ft). My house is 2800 sq ft with a 10 year old Bryant 80% furnace so this unit was under sized and I am not sure if it is operating properly.
I cannot tell if it is absorbing as much dust as it should. The owner’s manual calls for monthly cleaning of the cells, but they did not seem to collect enough dirt to warrant this so I increased the time between cleanings. The last cleaning was after about 6 months of use and they only had a very fine film of dust on the plates. I imagine this is the amount of dust that would stick to any flat surface in the ducts due to the air flow around them. This is why I don’t think they are working properly.
I contacted the manufacturer who said since the 2 lights on the panel turn on the unit is functioning, but the air may be flowing past the cells too quickly for them to properly clean the air because the EAC is undersized.
Can anyone tell me what the airflow of the new furnace will be? The contractor told me the fan will be set for 1000 cfm for the a/c (400 cfm/ton) and that the air flow would be lower than that for heating. The furnace specs list air flows between 1458 to 2115 cfm for high stage heating so I am confused as to what the maximum air flow will be. This will determine if my existing EAC will work as well as if my return duct will need to be increased in size.
I am lost of what to go for here. My contractor told me he will install anything I want but didn’t give great direction here.
I read a little about the Honeywell IAQ that can control both temperature and humidity. Will this thermostat be able to control my Aprilaire 550 humidifier during heating season and be able to dehumidify using the a/c during cooling season?
Any other recommendations? I want a programmable thermostat because I use that feature.