Neither a nor an can be added before furniture. Furniture is the general term for "furniture" and refers to large movable items indoors. It is an uncountable noun and does not have a plural form.
n. Furniture; device; customary opinion; storage, content; rifle base; (for typesetting) large blank lead, fill-in-the-blank material
Vocabulary collocation:
Composite furniture? Composite furniture; Composite furniture; Composite household appliances; Composite
Antique furniture; Ancient furniture; Antique furniture
Chinese furniture? Chinese furniture; China Equipment; Ming-style furniture Synonyms: equipment
Pronounced in English and American
n. Equipment, utensils; the process of equipping (for someone or something); (should have to do something) (of) quality, talent
Phrases
peripheral equipment? [calculation]? External equipment; logistics peripheral equipment; peripheral equipment
sports equipment? Sports equipment; sports Equipment; sports equipment; sports equipment
medical equipment? Medical equipment; medical equipment