Trying to compare HVAC quotes is difficult because they are rarely comparable. Two contractors can quote very different numbers for what looks like the same job, and unless you know what sits behind the numbers, the only thing left to compare is price.
Here is what to look for in every furnace replacement quote. It pairs with our guide on choosing an HVAC contractor, which covers who to call. This one covers what they hand you afterward.
A number given over the phone, or after a two-minute look at the old unit, is not an estimate. It is a guess with a dollar sign in front of it.
A real furnace replacement quote is based on the heating and cooling requirement of your house — square footage, ceiling heights, insulation, window area and orientation, air leakage and layout. Not the capacity of the old furnace, which may have been wrong for twenty years.
Ask what the calculation came to. The industry standard is ACCA Manual J, and a contractor who ran one will tell you. Why it matters is covered in HVAC sizing and Manual J.
Manufacturer, model number, capacity in BTU, efficiency rating and stage type. Single-stage, two-stage or modulating. Blower type. If a coil or air conditioner is included, its model and rating too.
Without model numbers you cannot compare HVAC quotes at all, because “a new furnace” covers an enormous range of equipment.
A proper HVAC estimate breakdown lists each part of the job. Removal and disposal of old equipment. New equipment installation. Venting work. Gas line modifications. Electrical work. Condensate provisions. Duct transitions or modifications. Thermostat.
This is where quotes diverge most. One includes venting modification, duct transitions, a new thermostat and a condensate pump. The other assumes everything is reusable. The second number is lower right up until installation day.
High-efficiency variable-speed equipment on undersized ductwork does not perform like high-efficiency variable-speed equipment. A quote should reflect whether your duct system can move the required air, which comes from a static pressure measurement rather than an assumption.
If duct modification is needed, it should be in the quote, not discovered later.
Ask what gets measured and verified when the system is commissioned. Gas pressure. Temperature rise against the data plate. Airflow. Safety control testing. On a heat pump, superheat and subcool, defrost verification and changeover testing.
If a furnace replacement quote does not mention commissioning, ask. The answer tells you a lot. Installation is not finished when the system turns on.
Required work should be permitted. Requirements vary by municipality, and a contractor should be able to tell you exactly what applies and include it.
Warranty should be stated in two parts: the manufacturer warranty on the equipment and the contractor’s labor warranty, with their own terms. What voids a manufacturer warranty is covered in our furnace warranty guide.
When you compare HVAC quotes that are far apart, it is almost always one of these.
Different equipment tiers. A single-stage 80 percent AFUE furnace and a modulating 96 percent variable-speed furnace are not the same product.
Different scope. One includes work the other left out.
Different sizing. A contractor who ran a load calculation may be quoting a smaller unit than one who matched the old nameplate. Smaller is often correct, and it usually costs less.
Different labor standards. Proper evacuation, correct line sizing, sealed transitions and full commissioning take real time.
Different overhead. Insurance, training, warranty support and having someone answer the phone in January all cost money.
A price with no site visit. Sizing based on the old unit’s nameplate. Today-only pricing on a decision this size. No load calculation and no willingness to discuss one. Skipped permits. A one-line quote with no model numbers. No mention of what happens at startup.
We come out, evaluate the house, run the calculation and give you a written quote with a line-by-line HVAC estimate breakdown: what is being installed and what is being done. If there is more than one reasonable path, you get them laid out with the trade-offs rather than a single take-it-or-leave-it number.
Replacement estimates are free, and financing is available with approved credit. During installation, floor coverings go down, access paths get protected, and your old equipment is removed for recycling. What that day looks like is covered in furnace installation day.
That approach is why families across Southwest Michigan have stayed with us for over 50 years.
Two or three is reasonable. What matters more than the number is that they are comparable, which means each specifies equipment models and scope of work.
Not automatically. A lower number that excludes venting work, duct modification or commissioning is not actually lower — it defers the cost.
Requirements vary by jurisdiction, and permitted work is generally the right approach. A contractor should tell you what applies in your municipality and include it in the quote.
Comparing quotes right now? Call J&J at (269) 965-1627 or schedule a free estimate today.
9000 M-66 South • East Leroy, MI 49051
(269) 965-1627
Monday - Friday: 8:00am - 5:00pm
