System size estimator with the Manual J warning
Why a square-foot rule is not a size, what raises or lowers your house's load, and the Manual J question to put to any Michigan HVAC quote.
Open the toolFurnaces, boilers, heat pumps and air conditioners fail on different days of the year, and the rules and prices differ from one state to the next. Pick the job and add your ZIP code, and we pass the request to one heating and cooling company that serves it. You agree the price with that company. Before work starts, ask for its license number and check it with your state's licensing board; our state pages link the lookup.
Request sent
We passed your job request to one heating and cooling company serving your area. Keep your phone nearby.
If you smell gas or a carbon monoxide alarm sounds, leave the house and call 911, then your gas utility's emergency number printed on your bill; our state pages list the numbers. Do not wait for our call.
Each service page covers what a technician does on the job, the cost evidence, when it cannot wait and when it may need a permit. Heating and cooling jobs sit side by side, and a page says so when no source turned up.
What to check, what is a safety call, and who may repair a furnace.
What it costsFirst checks, refrigerant rules and cost evidence.
What it costsSizing, permit, efficiency and rebate facts.
What it costsCold-climate heat pumps, rebates, permits and refrigerant rules.
What it costsWhat is sourced about ducts, and what is not.
What it costsTriage for gas smells, alarms and a furnace that quit in winter.
What it costsThree steps, with nothing for sale at the end. The heating and cooling company that receives your request pays us, and you never do.
How we are paidOne tap for the job, then five digits. If no company we send to serves your ZIP, the form says so now, before it asks for your phone number.
Name, phone and email go on the last step, with a line beside each saying why we ask. Only the company that gets your request is meant to call the number you give.
It names its own price and you can say no. If nobody calls, no company took the job, and the guides on this site are your next step.
The system size estimator, the repair or replace check and the rebate and tax-credit finder each answer a question people have before they ask for a quote. None of them asks for your name.
Why a square-foot rule is not a size, what raises or lowers your house's load, and the Manual J question to put to any Michigan HVAC quote.
Open the toolFour taps give a direction: leave if you smell gas, then repair, get a second opinion or price a replacement, using ENERGY STAR's age line.
Open the toolDTE, Consumers Energy, Lansing BWL, Ann Arbor and MiHER rebates with the date we checked each, and the federal credit status per the IRS.
Open the toolEach state page names the licensing authority, the mechanical code in force and the permit offices. City pages add local facts such as housing age and degree days.
The guides cover furnace permits, winter shutoff protection, cold-snap no-heat checks, heat pumps in cold weather, carbon monoxide alarms and utility rebates, and each lists its sources at the bottom.
If you run a heating and cooling company and want homeowner requests for the work and ZIP codes you choose, the partner page explains what we send and how to apply.