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airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8064
Experience:  Furnace, A/C and heat pump specialist.
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Will a Rheem weather king work in 4 bedroom house

Customer Question

Will a Rheem weather king work in 4 bedroom house
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.
1. How many square feet and what part of the country are you in?To begin with, the only way to be sure unit is sized properly is to do a load calculation on the home.THis is known as a Manual J Load Calculation.It is a program where you enter all of the building construction factors such as square footage of home, construction type such as wood frame or brick,how much attic insulation, wall insulation. whether on a slab or up off the ground on peers. the square footage of glass windows and type of windows facing each direction, whether there are covered porches shading windows,number of occupants(figuring 2 per bedroom),number of fireplaces if any, number and type of exterior doors,ceiling types,geographic location and other such factors.For example a 1500 square foot well insulated home with double pane windows on a slab with 8 foot ceilings and very few windows facing east and west (receiving direct sunlight) with 2 bedrooms in North Carolina with an average high summer temperature of might 85 require only a 2 ton unit to properly cool the home where as the same1500 square home in South Alabama with an average high of 95 degrees.with 9 foot ceilings or if not well insulated and had a lot of glass windows facing west or east may require as much as 3 tons to properly cool the home.This takes about an hour and a half to two hours to do a manaual J by entering all the construction factors.Most contractors will run a manual J for about 200.00 and add it to the price of the installation.Many states are requiring the manual J in order for permit to be issued and inspected.This protects the homeowner and guarantees unit is properly sized.
Expert:  airheatman replied 1 year ago.
AS a general rule of thumb the unit which is a 5 ton will cool about 2800 square feet