What Size Furnace Do I Need? A Grand Rapids Sizing Guide
Don't guess your furnace size. How BTUs, Manual J load calculations, and West Michigan's climate determine the right furnace for your Grand Rapids home.

Professional furnace installation for Georgetown homes and businesses. Mazure's Heating & Air Conditioning is just 5 minutes from our Jenison shop — fast response when you need it most.
If your Georgetown Township home needs a new furnace, Mazure's Heating & Air Conditioning is five minutes away. We've installed hundreds of furnaces across Georgetown since 1987, from older ranch homes near Bauer to newer subdivisions off Cottonwood Drive. Mike Mazure personally oversees every installation. We size the system correctly using Manual J load calculations, install it in one day, and stand behind our work. Call (616) 669-8085 for a free estimate.
We regularly serve homes in Georgetown Township — near Georgetown Township Hall and Bauer. Our Jenison headquarters puts us just 5 minutes from our Jenison shop, which means convenient scheduling for appointments and installations.
Georgetown Township homes vary a lot. You've got 1970s split-levels on larger lots near 48th Avenue, early 2000s colonials in planned subdivisions, and newer builds going up along the township's western edge. Each house has different heating needs, and the furnace that works well in a tight 1,200-square-foot ranch won't cut it in a 2,800-square-foot two-story.
We start every installation with a Manual J load calculation. This isn't a guess based on square footage. We measure windows, insulation, ceiling height, ductwork, and sun exposure. The result tells us exactly how many BTUs your home needs. An oversized furnace short-cycles, wastes energy, and wears out faster. An undersized one runs constantly and never quite gets the house warm. Getting it right matters.
Efficiency is the other big decision. Standard furnaces run around 80% AFUE, meaning 80 cents of every dollar you spend on gas actually heats your home. High-efficiency condensing furnaces hit 96% to 98% AFUE. They cost more upfront, but Georgetown homeowners with higher gas bills often recoup that difference within five to seven years. We'll show you the numbers for your specific situation and let you decide.
We show up in the morning, usually between 8 and 9 AM. Our crew removes your old furnace, disconnects the gas and electrical, and hauls it out. If your ductwork needs modifications or your flue needs updating for a high-efficiency unit, we handle that the same day.
The new furnace goes in, gets connected, and gets tested. We run it through a full startup sequence: check gas pressure, verify airflow across the heat exchanger, test the safety controls, and make sure every register in your house is getting warm air. Most Georgetown installations are done by mid-afternoon.
Before we leave, we walk you through the new thermostat, show you where the filter goes, and tell you what maintenance schedule to follow. We clean up our work area and take the old equipment with us. You don't have to deal with any of it.
We install Carrier, Lennox, and other major brands. Mike will recommend what fits your budget and your home, not what pays us the biggest margin. That's been our approach since 1987, and it's why Georgetown families keep calling us back.
A new furnace installation in Georgetown Township typically runs between $3,500 and $7,500. The price depends on the efficiency rating, the brand, and how much ductwork modification is needed. A straightforward swap of an 80% furnace in a home with good existing ductwork sits at the lower end. A high-efficiency upgrade that requires new venting and duct changes will be toward the higher end.
We provide free in-home estimates. Mike or one of our senior techs comes to your Georgetown home, measures everything, looks at your existing ductwork, and gives you a written quote. No pressure. No expiring discounts designed to rush your decision.
We also offer financing options for Georgetown homeowners who'd rather spread the cost over time. Ask us about available plans when we come out for the estimate.
One more thing worth knowing: the federal tax credit for high-efficiency furnaces ended for systems installed after 2025, so don't count on it. Consumers Energy has offered rebates on qualifying high-efficiency furnaces, and we'll check what's current when we write your estimate.



Don't guess your furnace size. How BTUs, Manual J load calculations, and West Michigan's climate determine the right furnace for your Grand Rapids home.
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Mazure's is just 5 minutes from our Jenison shop. Call for fast, honest service from a company that's been trusted since 1987.