Restrictive covenants are not considered illegal, but restrictions that are particularly exacting have been found to limit the ability of an individual to do business. In these cases, some courts have found a specific restrictive covenant agreement not to be valid. That is, the court in question would not hear the case.
1 Because tankless water heaters require a 220V/240V electrical outlet or larger gas pipes than found in an average home plus a stainless steel ventilation system, installation can add $1,000-$3,000 or more, bringing total costs to $1,800-$4,500. A central tankless water heater providing hot water for an entire house can cost $800-$3,000 or more, depending on gpm capacity and whether it's gas or electric, plus features like a safety temperature lock or a remote control.
As opposed to a traditional tank storage water heater which uses a steady supply of electricity to store and constantly heat water, the tankless models only heat water as necessary. The average cost for a propane powered single-point tankless water heater system will be $1,500 - $2,000. Tankless units can be installed on the interior or exterior of the building near the water use point and no more than 50 ft. from an adjacent power source (typically requiring 220 volts).