At 2W/GH you realize how big your electricity bill will be right?

What is the cost kWh in the location you are settings up?

278 S1 Ants x 180GH x 2W = 100,080W

Standard home user rate of 15c kWh = 100kW x 24hrs x $0.15 = $360 per day or $10,800 per month.

Buying the 1W/GH S2 would probably pay for itself pretty quickly with half the power cost and it will be a lot easier to deal with half the heat.