A far more efficient option is a fire which has a convector firebox to boost output.

Despite the drawbacks, the elimination of extra operations often makes using form tools the most efficient option.

The chief town planner said that the omitted proposal "was not an efficient option and would create unnecessary construction waste".

The subway system, originally built by separate companies, has always lacked efficient east-west options.

The shuttles were by no means as efficient an option as the transporters would have been.

Open hostilities are costly, and in the game setting, rarely prove to be the most efficient option.

Sometimes, Ostrom points out, local solutions can be the most efficient and effective options.

Solar power is an energy efficient option, too.

But no matter how you look at it, the static field is not the most efficient option," Brooks observed.

Either way, this seemed the most efficient option.