First post go easy, I need to replace my heat pump that is 3.5 ton, the manufacturer I am considering, offers 3 or 4 ton only. I know I need calculations done on the present system and the home. The present 23 year old system "seems" to be sized correctly or should I say I have no complaints on comfort. My question is what is the most common selection smaller or larger? Location is rural central Virginia.
Goodman 3 vs 4 ton options
VaGlock
21 - 35 of 35 Posts
I looked at one load form on the web last night. Was a little confusing as far as window and glass door inputs, the back of my home (south) has 20 ft of sliding glass door panels.
Started at 78, outside temp 89 with 58% humidity, it took unit 2 1/2 hours to drop temp to 75 deg. outside temp 90deg with 58% humidity. partly cloudy if it makes a difference. My duct outlet temps running 50 - 52 degrees.
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39,604 Posts
Which manufacturer is it that doesn't offer 0.5 ton increment sizing of condensing units?
PHM
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PHM
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Sorry did not get a chance to check cycle time, had to leave the house.
-- BUILDING THERMAL ENVELOPE _ Definition for Load Calc
1985 __ 1,900 Sq Ft with full basement
Perimeter: 2* ( 56 + 34) = 180
Wall Height: ~ 9'
Wall Area = 1,620 Sq Feet
same for basement
R-30 Ceiling
R-11 Walls
Windows - Double Pane ?
Total Glass Area = ~ 250 Sq Feet?
__________ or 400 with Sliding Glass Door - South
Please provide :
Dir
___ # Windows
N
S
E
West
1985 __ 1,900 Sq Ft with full basement
Perimeter: 2* ( 56 + 34) = 180
Wall Height: ~ 9'
Wall Area = 1,620 Sq Feet
same for basement
R-30 Ceiling
R-11 Walls
Windows - Double Pane ?
Total Glass Area = ~ 250 Sq Feet?
__________ or 400 with Sliding Glass Door - South
Please provide :
Dir
___ # Windows
N
S
E
West
At 90'F +, it should not be able to reduce the temperature.
Seems a Little Oversized to me At-The-Moment.
Will try to get as much of the measurements and directions as I can for you all this afternoon, have a graduation I need to go to this morning
I do appreciate all the knowledge and information you guys or sharing. This is a amazing forum.
.
I do appreciate all the knowledge and information you guys or sharing. This is a amazing forum.
.
There is 29 ft of cathedral ceilings if needed for calc.
House is 28 x 68 wood siding.
Similar temps today, 90 degrees, sunny, 60% humidity, cycle times are running 28 minutes running and 26 minutes off. 2pm to 4pm. outlet temp at closest register is 51 degrees.
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21 - 35 of 35 Posts
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