Infrared heats objects not air, so you are kept warmer even in a relatively cold room.
Some heaters use a quartz glass heating element and some use a metal sheath tubular element.
Metal heaters last longer, and are not as subject to damage from environmental factors, shock and impact. Quartz emits light as well. Fostoria Trimline Quartz Tube Assemblies. Model CH-46 has a 120 volt plug and cord for residential home use. Fostoria FFH Quartz Tube Assemblies.