Name pat Walton
Email address patrickj.walton@yahoo.com
Phone number
Where is your project located? United States
State/Province Montana
Nearest City or County Lewis and Clark
How would you like use to size your system? Size by Square Footage and Location
Estimated Heating Demand 10.1 kW ( 34471.3 BTU/hr )
Output of selected heat pump at design temperature (-30C/-22F maximum) 9.2kW
Percentage of demand load requirement produced by heat pump at design temperature (-30C/-22F maximum) 91%
External backup boiler required 12kW
Internal backup boiler required if using Alt Source tank 12kW
Heating Design Temperature -10° F
Total Square Footage (sq. ft.) 4000sq.ft.
Insulation High
Arctic heat pump required 060ZA/BE
Comments 1" stucco exterior, cement tile roof , 2400 sq ft main floor with hydronic closed loops fastened to joists + 16 inch insulation beneath, solid foam in 6 inch exterior walls, r-19 blown in attic insulation. baseboard heat in finished basement, house built in1999. 3/4 inch hardwood floors over 1 " subfloor, double pane windows, 4 zone control heating with propane boiler. basement heating works perfectly, main floor cannot keep above 60-64 degrees in winter. wish to transition to air to water heat pump and add flat mount radiators on main floor if possible stubbed into existing subfloor lines '
Contact by Arctic Agent No

*NOTE* - The heating demand load we have estimated for this project is likely to be inaccurate. There are many variables that factor into a building’s heating demand, and although square footage and insulation value are major factors, many other building variables contribute. We compared the results of this tool against hundreds of custom manual J reports and found that this tool predicted the demand load within +/- 10% of actual calculated load in 25% of the manual J results we compared to. This tool has limited accuracy when predicting the demand load of a single project but is very accurate at predicting average demand loads on a macro scale.

To get a more accurate estimation of the final demand load range for your unique project, we suggest you run this tool at all three insulation value options (High, Medium, Low). 90% of the manual J reports we compared to have a demand load that fits within the three predictions generated by running this report at all three insulation values.

Arctic takes no responsibility for any performance issues resulting from using this estimation to size a heat pump. We recommend that every customer has a manual J conducted before purchasing heating and cooling equipment. A manual J is the most accurate way to predict a building’s demand load.

If you would like Arctic to conduct a manual J for your project, please click the link below:

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