What size AC for Borger, TX? 4 tons for 2,000 sq ft

What size AC a 2,000 sq ft house in Borger needs

4 tons central AC or heat pump, about 42,200 BTU/hr of load

Here the 20 BTU per square foot chart lands close: 3.5 tons against a load of 3.5 tons. This is one of the climates the chart was written for.

If a contractor quotes you more than 4 tons for an average 2,000 sq ft house here, ask to see the Manual J load calculation behind it before you sign. That works out to one ton per 569 square feet in this climate. For a single room, size by the room: 21.1 BTU/hr per square foot.

The climate it is sized for

Climate from NOAA's 1991 to 2020 normals at Borger Hutchinson County Airport (2.5 mi away). Jul is the hottest month, averaging a high of 95.4°F and a low of 70.5°F, with about 93 days a year at 90°F or more. That gives a design temperature of 102°F against 75°F inside.

What it costs to run

About 3,023 kWh a year at SEER2 14.3, or roughly $485 at Texas's average residential rate of 16.03¢ per kWh. Cooling runs 7 months of the year here.

What drives the load in Borger

Of the 42,200 BTU/hr, 19,440 comes through walls, roof and windows on a 102°F afternoon (46%), 13,000 is sun on the house (31%), 2,120 is four people and their appliances, and 7,600 is moisture the coil has to wring out of Borger's summer air (18%).

Heat through the shell is the biggest share here, so insulation and air sealing cut the size you need more than shading would. Sensible heat totals 34,560 BTU/hr before the moisture allowance.

Other house sizes in Borger

Single rooms with a window or mini-split unit: a 150 sq ft bedroom needs about 3,200 BTU/hr; a 350 sq ft living room needs about 7,400 BTU/hr; a 600 sq ft open plan kitchen and family room needs about 12,700 BTU/hr.

Month by month in Borger

Jul alone uses 27% of the year's cooling energy. The unit runs the equivalent of 1,025 hours a year at full output.

Borger against nearby cities

Of 252 Texas cities here, Borger has the 227th highest cooling load. The range runs from Levelland at 37,300 BTU/hr to Laredo at 51,500.

Where Borger's weather numbers come from

The nearest NOAA station with full 1991 to 2020 normals is Borger Hutchinson County Airport, 2.5 miles from the center of Borger at 3,041 ft above sea level. That is close enough that the station's summers are Borger's summers.

No other city in this set uses Borger Hutchinson County Airport, so this sizing is Borger's alone.

The sun over Borger in late July

At 35.66°N, the noon sun on 21 July stands 74.7° above the horizon over Borger and the day runs 14 h 04 min from sunrise to sunset. A lower noon sun puts more of the day's heat on east and west walls than on the roof, which is why shading west glass pays off here. Shorter days give the house a longer night to shed the day's heat.

11,892 people live in Borger, the 221st largest of the 252 Texas cities sized on this site. Coordinates used: 35.6594, -101.4024.

Borger AC sizing questions