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Standard Efficiency AC & Furnace Systems

Last step. Pick the size of the outdoor unit, the furnace's heating BTU, and which way the furnace blows. You'll land on every matched system for that combination, cheapest first.

Step 4: Size, BTU and airflow

Every standard efficiency combination we carry

SizeFurnaceAirflowSystemsFrom
1.5 Ton40,000 BTU, 80%Downflow15$3,432
1.5 Ton40,000 BTU, 80%Horizontal17$3,052
1.5 Ton40,000 BTU, 80%Upflow29$2,821
1.5 Ton60,000 BTU, 80%Downflow30$3,556
1.5 Ton60,000 BTU, 80%Horizontal44$3,560
1.5 Ton60,000 BTU, 80%Upflow50$3,061
1.5 Ton80,000 BTU, 80%Downflow2$5,099
1.5 Ton80,000 BTU, 80%Horizontal10$3,772
1.5 Ton80,000 BTU, 80%Upflow24$3,681
2.5 Ton40,000 BTU, 80%Downflow3$3,832
2.5 Ton40,000 BTU, 80%Upflow5$3,629
2.5 Ton60,000 BTU, 80%Downflow10$4,106
2.5 Ton60,000 BTU, 80%Horizontal49$3,325
2.5 Ton60,000 BTU, 80%Upflow55$3,348
2.5 Ton80,000 BTU, 80%Downflow37$4,111
2.5 Ton80,000 BTU, 80%Horizontal110$3,804
2.5 Ton80,000 BTU, 80%Upflow121$3,827
2.5 Ton100,000 BTU, 80%Downflow2$5,166
2.5 Ton100,000 BTU, 80%Horizontal7$3,902
2.5 Ton100,000 BTU, 80%Upflow3$3,925
2 Ton40,000 BTU, 80%Downflow16$3,639
2 Ton40,000 BTU, 80%Horizontal3$3,172
2 Ton40,000 BTU, 80%Upflow19$3,118
2 Ton60,000 BTU, 80%Downflow30$3,709
2 Ton60,000 BTU, 80%Horizontal44$3,262
2 Ton60,000 BTU, 80%Upflow66$3,181
2 Ton80,000 BTU, 80%Downflow3$5,024
2 Ton80,000 BTU, 80%Horizontal54$3,696
2 Ton80,000 BTU, 80%Upflow78$3,642
3.5 Ton80,000 BTU, 80%Downflow13$4,730
3.5 Ton80,000 BTU, 80%Horizontal52$3,791
3.5 Ton80,000 BTU, 80%Upflow48$3,833
3.5 Ton100,000 BTU, 80%Downflow14$4,844
3.5 Ton100,000 BTU, 80%Horizontal28$4,122
3.5 Ton100,000 BTU, 80%Upflow17$4,092
3.5 Ton120,000 BTU, 80%Upflow6$5,347
3 Ton60,000 BTU, 80%Downflow3$4,344
3 Ton60,000 BTU, 80%Horizontal31$3,425
3 Ton60,000 BTU, 80%Upflow28$3,497
3 Ton80,000 BTU, 80%Downflow23$4,349
3 Ton80,000 BTU, 80%Horizontal94$3,779
3 Ton80,000 BTU, 80%Upflow69$3,749
3 Ton100,000 BTU, 80%Downflow12$4,757
3 Ton100,000 BTU, 80%Horizontal34$3,877
3 Ton100,000 BTU, 80%Upflow17$3,848
4 Ton80,000 BTU, 80%Downflow6$5,149
4 Ton80,000 BTU, 80%Horizontal35$4,032
4 Ton80,000 BTU, 80%Upflow31$4,218
4 Ton100,000 BTU, 80%Downflow5$5,475
4 Ton100,000 BTU, 80%Horizontal11$4,320
4 Ton100,000 BTU, 80%Upflow9$4,368
4 Ton120,000 BTU, 80%Horizontal6$5,224
4 Ton120,000 BTU, 80%Upflow6$5,530
5 Ton80,000 BTU, 80%Downflow4$5,755
5 Ton80,000 BTU, 80%Horizontal7$5,345
5 Ton80,000 BTU, 80%Upflow15$5,286
5 Ton100,000 BTU, 80%Downflow6$5,507
5 Ton100,000 BTU, 80%Horizontal4$4,661
5 Ton100,000 BTU, 80%Upflow10$4,618
5 Ton120,000 BTU, 80%Horizontal6$5,573
5 Ton120,000 BTU, 80%Upflow6$5,899
Airflow direction. Upflow furnaces sit in a basement or closet and push air up. Downflow furnaces push air down into floor ducts, common on slab homes. Horizontal furnaces lie on their side in an attic or crawl space. Match what you have now.

BTU and tonnage. One ton of cooling moves 12,000 BTU of heat per hour. Furnace BTU is the heat it can put out. A colder climate or a draftier house needs more BTU for the same size home.
Not sure what you have? Send us a photo of the data plate on your outdoor unit and furnace, or call our team in Winder, GA at (877) 843-4822. Free shipping on orders over $99, and financing is available at checkout through Affirm. Need help with size? Try the sizing tool.