Use fuel more effectively
A higher AFUE furnace converts more of its fuel into useful heat. Compare the selected model with your current system and the full installed cost.
DeWitt Furnaces
10-Year Guarantee
On all parts, labor and materials.
Included with your DeWitt furnace installation.
DeWitt’s project guarantee. Ask for the written coverage terms before you purchase. Manufacturer warranties are separate.
DeWitt HVAC
Heating & cooling for your home.
Explore Goodman furnaces and air conditioning options for year-round comfort. Talk with DeWitt about the right equipment for your home. Get a clear, no-pressure estimate from DeWitt Building & Construction.
Financing availableAll credit applications accepted.
We’ll explain the work and answer your questions before you decide.
Choose what works for your home
Heating and cooling that fit your home.
DeWitt installs Goodman furnaces and offers heating and cooling options. Match the equipment to your home’s heating load, ductwork and installation conditions, then compare the efficiency and comfort features that matter to you.
Choose steadier comfort
Two-stage heating and variable-speed blower options can adjust operation to demand. Available features differ by furnace model.
Plan heating and cooling together
A compatible indoor coil, blower and outdoor A/C unit work as a matched system. Ductwork, airflow and controls are part of that decision.
The details behind the decision
Know what you’re choosing.
Goodman offers a range of equipment configurations. Your estimate identifies the exact models, capacity, efficiency, refrigerant, included work and warranty.
| What to compare | Specification or selection | Why it matters |
|---|---|---|
| Equipment identity | Exact model numbers | List furnace, outdoor unit, indoor coil and thermostat rather than the brand alone. |
| Furnace efficiency | AFUE percentage | Goodman lists 80% and 90%+ furnace families. The selected model determines its actual rating. |
| Heating and cooling capacity | BTU/h and cooling tons | Size from a professional load calculation; larger equipment is not automatically a better fit. |
| Heating stages and blower | Confirm both separately | Single-/two-stage heat and multi-/variable-speed ECM blower descriptions refer to different components. |
| Cooling efficiency | SEER2 for the matched system | Higher SEER2 indicates greater rated seasonal efficiency. Request the AHRI reference for the quoted combination. |
| Refrigerant and fit | Model-specific requirements | Confirm refrigerant, line-set compatibility, electrical supply, outdoor clearances and equipment dimensions. |
| Furnace installation | Venting, drainage and airflow | A condensing-furnace upgrade can require vent changes. Discuss condensate handling, ducts and startup checks. |
| Warranty | Written model-specific terms | Separate manufacturer parts/heat-exchanger coverage from installation labor; review registration conditions. |
Product references & technical information
Manufacturer and technical resources reviewed October 25, 2026. Educational references explain the products and ratings; your written estimate identifies the specific equipment, materials and work included.
Have a style or specification in mind? Include it with your estimate request.
Discuss my projectWhy work with DeWitt?
A local name.
A family behind it.
Alex HasanOwner, DeWitt Building & Construction
Alex kept the DeWitt name to carry on a business that has served homeowners since 1969—and to build a future for his sons.
Meet Alex & the DeWitt family →More of your home, in one conversation
Heating and cooling equipment works with your ducts and the rest of your home. DeWitt also offers windows and insulation, so your conversation can include the house as well as the equipment.
Based here in Southfield
DeWitt serves homeowners across Metro Detroit. You know the company you’re calling and the owner behind its name. Reach us at (248) 559-7300 to talk about your home.
A free estimate, with time to decide
Talk through your project, materials and price before choosing. The estimate is free, and there is no obligation to move forward. Ask about available financing options for qualified buyers.
Goodman heating & cooling
Explore furnaces and air conditioning.
See examples of Goodman equipment and discuss heating, cooling or a combined system with DeWitt.
Goodman gas furnace
Explore gas furnace options for your home’s heating needs.
Additional furnace options
Compare furnace configurations with DeWitt. We’ll help confirm the right fit for your installation.
Goodman central air conditioning
Ask about outdoor A/C equipment, indoor coil compatibility and cooling system sizing.
Goodman side-discharge A/C
Explore a different outdoor unit configuration. Ask which options suit your home and installation space.
Product images from Goodman are equipment examples, not a guarantee of a particular model or current stock. Your estimate confirms equipment, sizing, efficiency, features, installation and pricing. Air conditioning and combined-system work are quoted for your project.
Get a heating & cooling estimateHeating equipment
Goodman® furnace installation.
We install Goodman furnaces. Start with the right size and equipment for your home.
Goodman
Ask about available gas furnace models, efficiency ratings and blower options. We’ll discuss your home’s heating needs, existing ductwork, venting and installation scope before you choose.
Equipment features and efficiency vary by model. Your estimate identifies the equipment and installation included.
Local service, a familiar name.
Talk with our Southfield office about your project in Detroit, Dearborn, Livonia, Farmington Hills, Warren, Sterling Heights, Lansing or another community we serve.
See all 25 service communities →Start with a free estimate
Tell us how to reach you.
Send your estimate request directly to DeWitt. We’ll follow up to discuss your project.
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(248) 559-7300
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Your request goes directly to DeWitt Building & Construction. You can also call (248) 559-7300.
Furnace installation questions
Questions worth asking.
Have another question? Call DeWitt and talk it through with us.
Call (248) 559-7300Can I get an estimate for both a furnace and air conditioning?
Yes. Ask us for an estimate that identifies the furnace, air conditioning equipment and installation work for your home.
Will the highest efficiency always save the most overall?
Compare installation cost, current equipment, fuel and electricity use, and your home’s needs. A rating is not a guaranteed bill reduction.
What does furnace installation cost?
Your estimate depends on your home, product choices and installation needs. We’ll explain the price and scope of work clearly before you decide.
Are monthly payments available?
Financing is available. All credit applications accepted. Ask us about available payment options.
Do I have to commit after the estimate?
No. The estimate is free, and you can review your options before choosing whether to move forward.