Energy Use in Multifamily Buildings - Phase One

MGE recently completed a first-of-its-kind study of multifamily buildings in our service area to measure actual metered energy use. The study was based on electricity and natural gas consumption and cost histories for the period September 2004 to September 2005.

Annual total Electricity and Gas Costs

Annual total electricity and gas costs [53 kB PDF] (sorted by lowest to highest overall cost per square foot)

Findings from 66 properties:

  • Total energy costs per square foot of floor space per year varied greatly—from about 60 cents to $1.80 per square foot.
  • Heating costs varied from 11 cents to 62 cents per square foot. There is great potential for improvement, especially in newly designed buildings.
  • Forced-air heating sites had the best average heating costs. CWLHP (closed water loop heat pump) sites averaged second best. The hydronic category had the worst and the best individual site heating costs per square foot. The age of CWLHP buildings averaged the newest and hydronic averaged the oldest in the study.

When comparing one HVAC class to another, it may be prudent to look at a few of the best buildings in each HVAC class and the decade built.

For more information

Email Brian Driscoll at MGE.

Annual Energy Costs by Site

Annual energy costs by site [187 kB PDF] (sorted by heating-system type, decade of construction and number of stories)

Weather-Normalized Estimated Annual Space Healing Costs by Site - (Sorted by heating system type, decade of construction and number of stories)

Weather-normalized estimated annual space-heating costs by site [133 kB PDF] (sorted by heating-system type, decade of construction and number of stories)

Weather-Normalized Estimated Annual Space Cooling Costs by Site - (Sorted by cooling system type, decade of construction and number of stories)

Weather-normalized estimated annual space-cooling costs by site [111 kB PDF] (sorted by cooling-system type, decade of construction and number of stories)

Weather-Normalized Estimated Annual Space Heating and Cooling Costs (Combined) by Site - (Sorted by heating system type, decade of construction and number of stories)

Weather-normalized estimated annual space-heating and cooling costs (combined) by site [174 kB PDF] (sorted by heating-system type, decade of construction and number of stories)

Study Group Characteristics

Study group characteristics [34 kB PDF]