Use the chart below to find the correct heater size. If you have any trouble with this you can email us. Once you find the correct size your ready to find a heater. You can click the heater tab above to start browsing through our heater line or click here to continue to Cost Comparison.

Temp Rise	10	15	20	25	30
Surface Area (Sq Ft.)	Required Heater output in BTU/Hr:
200	21,000	31,600	42,000	52,500	63,000
300	31,500	47,300	73,000	78,800	94,500
400	42,000	68,000	84,000	105,000	126,000
500	52,500	78,800	105,000	131,000	157,000
600	63,000	84,500	126,000	157,000	189,000
700	78,500	110,000	147,000	184,000	220,000
800	84,000	126,000	168,000	210,000	252,000
900	94,000	142,000	189,000	236,000	284,000
1000	105,000	157,000	210,000	263,000	315,000

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