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Top-Rated Energy efficiency auditors in Marathon - Updated Nov 2026

Energy Efficiency Auditing FAQs, answered by experts

Costs depend on pipe length, accessibility, and whether additional services are required.

Home power is measured in kilowatt-hours, commonly expressed as kWh. The average home uses between 800 and 1,000 kWh per month. Peak usage (and highest bills) occurs in the middle of summer and the depths of winter. Keeping on top of your usage during these crucial months will lower your annual average usage considerably. 

Costs depend on the property size, audit complexity, and whether additional testing (e.g., blower door) is included.

Heat pumps transfer existing heat instead of generating it, using less energy. Compared to baseboard heaters, they can reduce heating costs by up to 50% and provide efficient cooling, lowering electricity bills and carbon footprint.

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

The Marathon, WI homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.