Energy Efficiency and Heating Your Home: A Milwaukee Homeowner's Guide

As the leaves begin to change and Wisconsinites start getting ready for the cold, a lot of homeowners have a top priority on their mind: how to heat their home as energy efficiently as possible.

It's a good instinct to have this year in particular, since Milwaukee area natural gas rates jumped 58% between March 2025 and March 2026, and a typical home using 150 therms a month is now paying roughly $75 more on its bill than it was the year before. With rates on the rise, a heating system that's quietly leaking money is no longer just a comfort issue, it's become a household budget issue too.

The good news is that heating your home efficiently doesn't have to mean guesswork, and it doesn't have to be expensive. At Green Homeowners United, we believe every Wisconsin homeowner should have access to the rebates, incentives, and know how it takes to lower their bills, not just the ones who already know where to look. Here's what actually matters when it comes to keeping your home warm, keeping your bills manageable, and finding energy efficient ways to heat your home this year.

Why Heating Efficiency Matters More Than You Think

Heating and cooling account for nearly half of the average home's energy usage, more than any other category, which means a heating system that's running below its potential, or fighting a losing battle against drafts and heat loss, is the single biggest lever most homeowners have for lowering their energy bill.

"Homeowners are looking for ways to take control of their monthly costs," says Kevin Kane, Chief Economist at Green Homeowners United. "Improvements like basement insulation, air sealing, and efficient heating systems don't just improve comfort, they can significantly reduce energy waste and lower monthly bills."

That combination of comfort and savings is exactly why heating efficiency deserves more attention than most homeowners give it. It's easy to notice a cold room or a spiking bill and assume the furnace is to blame, but often the real story is more complicated, and more fixable, than that.

The Real Cost of an Inefficient Heating System

With energy prices climbing, improving the efficiency of your home has become one of the most immediate ways to actually save money, since it doesn't require waiting on rate negotiations or utility policy changes, just a system that isn't working against you. An inefficient heating system doesn't just cost more to run, it works harder to do a worse job.

An aging furnace, poor insulation, or unsealed air leaks all force your heating system to overcompensate. Rooms stay cold no matter how high the thermostat goes, furnaces short cycle by switching on and off more than they should, and that extra wear breaks equipment down faster than normal use would, all while the meter keeps running.

Green Homeowners United's own field research backs this up. Through a 200 home energy assessment study across the Milwaukee area, we've seen firsthand just how much heat, and money, the average Wisconsin home loses simply because no one's identified exactly where it's happening.

Where Heat Loss Actually Starts (Hint: It's Not Just the Furnace)

Most homeowners assume a cold house means a broken furnace, but in reality the furnace is usually doing exactly what it was built to do. It's the rest of the house that's letting it down.

Attic and basement insulation gaps are two of the most common culprits. Heat rises, so an under insulated attic will let it escape straight through the roof before it ever has a chance to warm the rooms below. At the other end of the house, uninsulated basement walls and rim joists let cold air creep in from underneath, forcing your heating system to fight a battle it was never designed to win on its own.

Air sealing plays a role here too, since gaps around windows, doors, and utility penetrations let conditioned air escape and cold air in, quietly undermining the performance of even a brand new, high efficiency furnace.

We'll walk through the specific warning signs that your home needs more insulation in an upcoming post, but the short version is this: if your heating bills feel high relative to your home's size, insulation and air sealing are usually the first place to look, not the furnace.

Energy-Efficient Heating Upgrades Worth Considering

Once the envelope of your home, meaning its insulation and air sealing, is in good shape, upgrading your heating equipment starts to make a lot more sense, and there are genuinely good energy efficient hvac upgrades available to Wisconsin homeowners right now.

High efficiency furnaces and heat pumps are the two biggest options. Heat pumps in particular have come a long way in cold climate performance and can handle both heating and cooling duties in one system, which is part of why we're seeing more Milwaukee homeowners ask about them every season. Smart thermostats are a smaller, lower cost upgrade, and Focus on Energy currently offers an instant discount on ENERGY STAR certified models, which still make a real difference in everyday efficiency.

One sequencing note worth keeping in mind is that insulation upgrades should come before or alongside heating equipment upgrades, not after. Installing a brand new furnace in a leaky, under insulated house usually means oversizing the equipment to compensate for problems that insulation could have solved for less money. Get the envelope right first, and your heating system doesn't have to work nearly as hard, which is one of the simplest ways to reduce energy bills with your HVAC system without replacing anything at all.

We go deeper on specific improvement options in "What Are Energy Efficient Home Improvements?"

How Wisconsin Homeowners Can Pay for This

"A lot of families assume these improvements are financially out of reach," Kane adds. "But there are levels of funding available right now to help homeowners make these upgrades more affordable."

That's not an exaggeration, and helping people see that is honestly a big part of why we do this work. Wisconsin homeowners currently have access to a genuinely substantial stack of rebates and incentives:

• Focus on Energy offers instant discounts and mail in rebates on heating equipment, ranging from $50 for a smart thermostat up to well over $1,000 for high efficiency furnaces, boilers, and heat pumps, depending on the equipment and your income eligibility.

• IRA Home Energy Rebates, which include both the HOMES program (open to all Wisconsin households, with higher rebates for lower income households) and HEAR (for households at or below 150% of area median income), are live and accepting applications now.

• The Basement Insulation Grant helps offset the cost of exactly the kind of insulation work that makes heating upgrades more effective in the first place.

• Green Homeowners United also partners with Forward Together Wisconsin on a revolving loan fund, so financing doesn't have to be a barrier to getting started.

  
  

Nationally, somewhere between 700 and 800 HOMES projects have been completed since the program launched, and more than 300 of those have been right here in Wisconsin, with our team leading the majority of that work statewide. That track record matters, since navigating rebate paperwork and eligibility requirements is a lot less stressful with a contractor who's done it hundreds of times before.

Not Sure Where to Start? Get a Home Energy Assessment

If all of this feels like a lot to sort through on your own, that's exactly what a home energy assessment is for. A trained assessor identifies where your home is actually losing heat and money, rather than guessing, and shows you which upgrades will make the biggest difference for your specific house.

Thanks to a partnership between the City of Milwaukee's ECO Office and Focus on Energy, qualifying Milwaukee and Waukesha County residents can currently access a $0 home energy assessment, unlocking up to $20,000 in available incentives.

If you're curious what an assessment actually looks like, take a look at our Energy Savings Report, or go ahead and schedule a Home Energy Assessment directly.

Wisconsin Home Energy Savings Checklist

Want a quick reference you can work through room by room before winter hits? We've put together a full Wisconsin Home Energy Savings Checklist to help you spot the easy wins early.

Ready to Lower Your Heating Bills?

Milwaukee winters are tough on inefficient homes, and between rising natural gas prices and a limited window on some of these rebates, this fall is a good time to stop guessing and find out exactly where your home stands.

Schedule a free Home Energy Assessment with Green Homeowners United and find out where you're losing heat, and money, before winter sets in.