Lately I have been looking at Carrier, Trane and Hallowell. What is Hallowell? They make what is known as a cold climate heat pump. Here is their web page: http://www.gotohallowell.com/
So Carrier provided me a cost savings of their unit vs my unit and I wanted to make a comparison. I assumed that both Carrier and Trane were equal in heating I compared them with hallowell. Please provide comments. Here we go...
Base (existing 10 SEER) system: Yearly heat usage:
Cooling cost: $324
Heating cost: $895.
Electric Cost: $0.1179/ kWh
Assumptions: Numbers provided by Carrier. These numbers are average numbers.
Heating usage: 895/ .1179 = 7591.18 kWh
Hallowell savings over typical heat pump: 1369/ 2490 = .54979
Assumptions: Numbers provided by Hallowell web site. http://www.gotohallowell.com/vsheatpump.html
NOTE: The above is based on $0.10 per kWh as compared with a standard air source heat pump. Yearly heating load assumed to be approximately 120,000,000 BTU. This is intended as an example only. Various factors including but not limited to home construction, insulation and home location will determine actual savings over other heating systems.
Assumption: Most modern heat pumps are similar in cooling. The only advantage Hallowell will have is in heating.
The saved usage is:
7591.18 * .5479 = 4173.64 kWH/ year
The adjusted heating cost per year:
4174.64 * $0.1179 = $492
The heating costs per year with other traditional heat pumps is:
Carrier Infinity 19: $731 (top of the line with variable speed air handler and sophisticated controls)
Carrier performance: $728 (variable speed air handler and sophisticated controls)
Carrier Comfort 13: $786. (bottom of the line - fixed speed air handler)
Existing: $895. (for comparison 10 SEER - fixed speed air handler)
Vs Infinity 19 = $731 - $492. = $239
Vs performance = $728 - $492. = $236
Carrier Comfort 13: = $786 - $492. = $294
Existing = $895 - $492. = $403
Loan period is 5 years so I will limit savings to loan term:
Vs Infinity 19 = 5 * 239= $1,195
Vs performance = 5 *$236 = $1,180
Carrier Comfort 13: = 5 * $294 = $1,470
Existing = 5 * $403 = $2,015
NOTE: There will be additional savings over the Comfort 13 and existing system since they are not as good at cooling as heat pumps with variable speed air handlers.
I am going to think about the above and if you have any comments please offer them. But looking at the above it looks like comparing the Hallowell against another modern variable speed air handler/ heat pump can provide $200 -$300 per year savings.
Now I understand that in 2010 the price for electric will go up. This will be due in part because the agreement between the electric company and the state expires at that time. But that is pretty far away and the down side to the Hallowell is it has a 5 year Warrantee where the other heat pumps have 10 year warrantees. So I will not speculate on future electric costs.