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5 Tips for buying an AC unit online - Blog - Realty Executives

Verify if the manufacturer's warranty remains valid if you purchase online and install it yourself. Many brands require installation by a licensed HVAC professional to keep the warranty intact.

Buying an air conditioner online is convenient and often cheaper, but requires careful planning since you cannot physically inspect the unit or test its noise levels beforehand.

Online prices rarely include installation. Factor in an additional $500 to $1,000 for professional labor, especially for split systems or units requiring new electrical lines.

Buying the wrong size is the most common mistake. A general rule is 20 BTUs per square foot . 5,000 – 8,000 BTU: For rooms 150 to 350 sq. ft.. 8,000 – 12,000 BTU: For rooms 350 to 550 sq. ft..