Indiana HVAC leads

Indiana heating and cooling degree days

Indiana sits near the middle of the country on both measures, which means both seasons count. NOAA’s Climate at a Glance heating series records 5,587 heating degree days for 2025, close to the 1991-2020 average of 5,628 and 23rd highest of the 48 states with a statewide series.

On the cooling side, the cooling degree day series shows 1,047 for 2025, about 15% above the 1991-2020 average of 911 and 22nd of the 48 states. A state that ranks in the middle on both lists gives a furnace a full winter and an air conditioner a full summer. In 2025 the heating total landed within 1% of its average, while cooling ran well above its own.

How NCEI gets these numbers: every day, the gap between the mean temperature and 65°F is counted as heating degree days (when colder) or cooling degree days (when warmer). Summing January through December gives the 2025 total, and averaging the annual totals for 1991-2020 in the same statewide series gives the comparison figure.

Indiana counties by owner-occupied homes

The ten Indiana counties with the most owner-occupied homes appear below with the share of those homes heated by utility gas and by electricity, from ACS 5-year 2020-2024 tables B25003 and B25117. It shows housing and heating fuel only, not where leads come from.

Northern Indiana is the most gas-heavy part of the list: Porter (91.9%), Lake (91.1%), St. Joseph (88.7%) and Elkhart (85.7%) all exceed the statewide 64.1% in the county data (2020-2024 ACS). The Indianapolis-area counties run more electric, with Hendricks at 31.2% and Marion at 29.8%, and Hendricks also has the most propane of the ten at 5.9%.

Because 8.8% of owner homes statewide use propane and none of these ten counties passes 5.9% in the 2020-2024 ACS county data, the counties outside this table must together have a propane share above the statewide figure.

What Indiana HVAC buyers filter on

Indiana HVAC buyers narrow requests with the same kinds of fields that other home services buyers use. Each of the four below links back to a figure earlier on this page:

• Project type: for example install, replace or repair, for heating or cooling. With both seasons in the middle of the national range, Indiana buyers often take both.
• Homeowner status: owners approve replacements; the owner count is in the housing section.
• Timeframe: whether the homeowner needs work now or is planning a replacement.
• ZIP code: buyers set the ZIP codes their crews can reach, for example the gas-heavy northern counties, the Indianapolis area, or rural ZIP codes where propane is more common.

When HVAC opens, Indiana buyers will set these filters per campaign, down to the ZIP code, as on Summit’s other home services leads. Once HVAC opens, HVAC leads will be exclusive by default, with shared delivery on request. The full field list is on the sample HVAC lead.

Join the Indiana HVAC buyer list

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