Take the total amount of square feet in your home. The smallest unit is 18,000 BTUs (1.5 tons), while the largest is 60,000 BTUs (5 tons).
The formula I used to come up with the size I thought we needed was like this: ((2,350 x 25) / 12,000) + 0.5) = 5.39 my square footage was 1595.25What if my rough calculation is 4.67. We will get into these below, and show you a more accurate way to do the estimate. Would you round up to a 5 ton unit?While I don’t know how you did the calculations and what values you used, I generally would recommend with 4 ton instead, because most specifiers / contractors and even homeowners overestimate what they really need for capacity, and in the end spend much more than they need, in operating costs.Also keep in mind, that it’s much more “efficient” to fix air leaks, insulate, etc., than to oversize your HVAC system.If you don’t mind – what is the square footage that you used in calculations? To find out which tonnage will suit your room the best, please share details about your room such as dimensions, facing direction, floor, number of windows, etc.
AC calculator uses your house size (square feet), climate zone, efficiency and equipment type (standard central air vs central heat pump) to show you exactly what size central air unit you need.
The easiest place to look is on the AC unit itself. In fact, you can have homes that are identical in size, but still call for completely different size units.Here are the additional factors that need to be taken into consideration:Many homeowners hold on to the misconception that it can’t hurt to get a bigger central air conditioner than needed, just in case. To get a truly accurate size for central air that will work most efficiently in your house, you need to do a professional load calculation, known as “the Manual J”.Most HVAC installers include it for free as part of their estimate, when they give you the total Pro Tip: its best for you to ask him to actually perform a complete Manual J assessment (they have the software program that runs it).
Yelena also has a personal interest in interior design, as well as in unique DIY remodeling projects. Window Direction* All was insulated with roll in insolation and later blown in type over the roll in. Our house has dual glazed windows with some type of gas that is supposed to keep out the heat. AC Unit Size Calculator accurately estimates the size of the central air conditioner unit you should install in your house. AC units are not all created equal. Mini splits do not have this issue because the cold or hot air is produced right inside the room. For example, a 2,200 sq.ft. That’s it! Over the open beam there is 2 inch Styrofoam 1 inch plywood roofing felt and medium brown asphalt shingles.
It is like buying a 5 Amp power supply to power a 0.5 Amp device. This home would require a furnace that has a tonnage of approximately 3. Room Size(ft.)*
However, it is important to realize that because there are so many factors that may impact this calculation, you will most likely not be able to take them all into account properly. The importance of a quality install cannot be overstated enough. So, the bigger your room, the more cooling capacity your AC needs to have, hence, more tonnage. I’m planning on replacing my 28 year old 4 Ton 5 Seer air conditioning unit and ducting. Unit sizes go up in half ton increments:A unit that is above 5 tons is considered commercial size and these large units are actually not available for home installation.