How Long Does a Furnace Replacement Take?
A straight furnace swap is usually done in one day. Venting changes, a chimney liner, gas line or duct work, and the permit inspection add time. What to expect.
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Replacing a furnace in New Prague runs $4,500–$9,500 installed with us, set mostly by 80% versus 96–98% AFUE and the venting. Every quote is written, flat-rate and sized by Manual J. CenterPoint Energy supplies gas in town, and its furnace rebate lets you choose your own dealer.
Most New Prague replacements right now are 2000s builder furnaces coming out of two-stories, split-entries and twinhomes. Those houses already have PVC venting, but a new furnace's manual may call for a different pipe size or termination kit, and some original runs are pitched wrong or end too low for our snow. We check before reusing any of it. Builders also tended to install whatever fit the budget, so a Manual J often changes the size, and a two-stage model helps the rooms at the end of long runs.
Around Main Street the older houses bring a separate list: a chimney-vented 80% furnace or a converted gravity system, a water heater that may need a liner once the furnace leaves the chimney, and tight basement stairs. CenterPoint Energy's heating rebates let you use the dealer of your choice, and the application has to go in the same calendar year as the install. We pull the mechanical permit.
Updated September 23, 2026
An installed furnace from us runs about $4,500–$9,500 in New Prague: 80% AFUE roughly $4,500–$6,000, 96–98% AFUE roughly $6,500–$9,500. Same prices in New Prague as in every town we serve. See the furnace replacement cost guide.
Because most of New Prague buys electricity from New Prague Utilities, electric-side rebates come from the city's program, run with the Southern Minnesota Municipal Power Agency; it has covered air-source heat pumps, cooling equipment and tune-ups, and furnace fan motors. Some addresses are on Minnesota Valley Electric Cooperative instead, which ties heat pump rebates to its off-peak program. On the gas side, CenterPoint Energy's heating rebates cover high-efficiency furnaces and boilers installed by any dealer. Rebate programs change every year, so check the utility's current terms before you buy.
Our guides: Xcel and CenterPoint rebates, heat pump rebates.

More detail on our furnace installation page.
Sometimes. The pipe has to match the diameter the new furnace requires for its length and number of elbows, slope back toward the furnace so condensate drains, and end at terminations that clear the snow line and nearby windows. Many builder runs meet that and some don't. We check against the new model's installation manual and put any venting changes in the written quote.
Often, in these houses. A builder furnace and condenser installed the same week tend to wear out within a few years of each other, and the AC coil sits on the furnace. Replacing both means one matched system, one round of coil and line-set work, and one permit visit. If the AC is younger or was recently repaired, we can replace the furnace alone and keep the coil connection.
A straight furnace swap is usually done in one day. Venting changes, a chimney liner, gas line or duct work, and the permit inspection add time. What to expect.
Read the guideReplacing the furnace and AC together in Minnesota costs $9,700–$19,300 installed with us. Matched coils, AHRI ratings, and when to split the job instead.
Read the guideConverting an oil furnace or boiler to gas in Minnesota: typical national costs, getting gas to the house, venting, the oil tank, hot water and rebates.
Read the guideFurnace replacement in New Prague? Call or send a request.