Up front capital invested can range from as low as $500 for a small, shallow pond aeration system to as much as $8,000 or more for a larger system or a solar aerator.Operating cost is dependent on the number of amps needed to power an electric motor multiplied by the electricity cost in your area.ome electric aerators might run for 2-3 years without any major issues and others might run 5-7 years or longer. The table below is based on a set of assumptions that is fairly representative of actual costs for a 1 to 2 acre pond or small lake.
Surface Hub costs less than half that, and is in essence a collaborative center in a box. Costs for a conference room that would accommodate the lower-end unit are about $6,500 to $27,000, again not including furniture, installation, service, and ongoing management costs, so a similar savings can be had there as well.
The price then rose to close at $2.46/MMBtu yesterday. Prices in most markets, except the Northeast, followed a similar pattern, ending down for the week, after reaching weekly lows on Friday. Chicago Citygate spot prices started at $2.56/MMBtu last Wednesday and closed yesterday at $2.46/MMBtu. The Henry Hub spot price began the week at $2.47 per million British thermal units (MMBtu) last Wednesday then closed the week down by 1Â¢ at $2.46/MMBtu yesterday. 2  At the New York Mercantile Exchange (Nymex), the November near-month contract decreased from $2.524/MMBtu last Wednesday to $2.474/MMBtu yesterday.