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2. 10 Signs Your Heater Isn’t Working as Well as It Could (and ...

   www.aol.com/10-signs-heater-isn-t-200000044.html

   Ultimately, the older a heater gets, the less efficient it will become, so if the heater is 15 to 25 years of age, it may be time to start saving for an upgrade. 5. Clogged Air Filter

3. Home wiring - Wikipedia

   en.wikipedia.org/wiki/Home_wiring

   Single-phase ~230 V/40 A/9 kW fuse box for apartment rewiring. Each appliance and each room are highlighted into autonomous circuits - this apartment has 14 individual circuits. A relay is used to control the light fixtures in a large room. In new home construction, wiring for all electrical services can be installed before the walls are finished.

4. NEMA enclosure types - Wikipedia

   en.wikipedia.org/wiki/NEMA_enclosure_types

   The National Electrical Manufacturers Association (NEMA) defines standards used in North America for various grades of electrical enclosures typically used in industrial applications. Each is rated to protect against personal access to hazardous parts, and additional type-dependent designated environmental conditions.

5. Trace heating - Wikipedia

   en.wikipedia.org/wiki/Trace_heating

   Electric heat tracing, heat tape or surface heating, is a system used to maintain or raise the temperature of pipes and vessels using heat tracing cables. Trace heating takes the form of an electrical heating element run in physical contact along the length of a pipe.

6. Do I need to worry about space heaters? Here’s what experts ...

   www.aol.com/lifestyle/worry-space-heaters...

   If your space heater is five or more years old, it's a good idea to check to make sure it has modern safety features like automatic shut-off if the device is tipped over or overheats, Lambert says ...

7. Patio heater - Wikipedia

   en.wikipedia.org/wiki/Patio_heater

   Hanging patio heater: portable and small footprint; comes in electric only Tabletop patio heater: ultra-portable and great for smaller groups or outdoor dining, but it uses a small propane tank Patio heaters have become popular with bars and restaurants, since they extend the day and the season for their customers to sit outdoors.