I ended 2022 with two older HVAC systems
July 2022 and July 2023 is a good comparison of performance even though 2022 was much warmer with 3 days over 100 deg
Here are comparisons of July for both years Replacing only System 1 in 2023. Daily Temperatures are across the bottom of both graphics
Original Systems
New System 1 with Heat Pump
Observations:
•2022 was a product/usage deficit of 350 kWh vs 2023 was a surplus of 440kWh. A 790kWh delta
•2022 average temperature was 4 degrees hotter and had 3 100+ days where as 2023 had zero days above 100 deg
•2022 used more than generated 20 days. 2023 used more than generated 1 day (Cloud cover)
•In 2022, when temps> 90 deg usage ranged from 61kWh to 90 kWh, 61kWh to 75 kWh when looking at 91-98 to compare with 2023
•In 2023, when temps > 90 deg usage ranged from 50kWh to 55kWh (91-98 deg)
Clouds, temps etc where different so I pulled out two 98 degree days. You can't tell which is the Cloths Dryer and which are the different HVAC systems so we can only compare totals.
The one thing to note, on a 98 degree day changing only System 1 for a more efficient Heat Pump reduced consumption from 75kWh to 52.77 kWh.
It would have been interesting to see how it performed on a 100 deg say. in 2022 usage jumped up as high as 90 kWh
I am very pleased with how the system performs and the difference should help power an eventual EV
I would not expect replacement of System 2 to provide such a dramatic impact. Potentially another 5-10kWh improvement on high 90 deg days as a guess
- System 1 Goodman Furnace- 10 SEER AC- all 18 years old. (Guessing SEER closer to 6 actual due to age??)
- System 2 Goodman Furnace 18 years old, 13 SEER AC - 9 years old
July 2022 and July 2023 is a good comparison of performance even though 2022 was much warmer with 3 days over 100 deg
Here are comparisons of July for both years Replacing only System 1 in 2023. Daily Temperatures are across the bottom of both graphics
Original Systems
New System 1 with Heat Pump
Observations:
•2022 was a product/usage deficit of 350 kWh vs 2023 was a surplus of 440kWh. A 790kWh delta
•2022 average temperature was 4 degrees hotter and had 3 100+ days where as 2023 had zero days above 100 deg
•2022 used more than generated 20 days. 2023 used more than generated 1 day (Cloud cover)
•In 2022, when temps> 90 deg usage ranged from 61kWh to 90 kWh, 61kWh to 75 kWh when looking at 91-98 to compare with 2023
•In 2023, when temps > 90 deg usage ranged from 50kWh to 55kWh (91-98 deg)
Clouds, temps etc where different so I pulled out two 98 degree days. You can't tell which is the Cloths Dryer and which are the different HVAC systems so we can only compare totals.
The one thing to note, on a 98 degree day changing only System 1 for a more efficient Heat Pump reduced consumption from 75kWh to 52.77 kWh.
It would have been interesting to see how it performed on a 100 deg say. in 2022 usage jumped up as high as 90 kWh
I am very pleased with how the system performs and the difference should help power an eventual EV
I would not expect replacement of System 2 to provide such a dramatic impact. Potentially another 5-10kWh improvement on high 90 deg days as a guess
