Supplied as kits, Halls ' comprehensive range of free-standing and lean-to greenhouses is made from maintenance-free aluminum.
The other is a maintenance-free battery.
With a maintenance-free battery, you have nothing to do except keep it clean and make sure the terminals and connections are in good shape.
Solar shingles remain practically maintenance free after they are installed.
Stainless steel is the poorest conductor of heat among metal pans, but it is most widely used because it does not cause any chemical reactions to food and is virtually maintenance free.
