How to pay for a new HVAC system

Heating and cooling equipment fails without warning, cannot be deferred in a climate with real winters or summers, and is quoted within a day or two of the diagnosis. That combination makes HVAC replacement one of the most commonly financed home repairs, and it means the financing terms deserve the same attention as the equipment choice.

Why HVAC replacement is financed

A furnace or air conditioner that fails in the middle of a season is an emergency purchase. The homeowner has no time to shop, the contractor knows it, and the quote often arrives with a financing option already attached. The equipment itself is only part of the price: labour, permits, ductwork changes, refrigerant lines and the disposal of the old unit all move the total.

The size of the number is what makes financing normal. A full system replacement is one of the larger routine home expenses, and paying it from savings is not an option for every household. That is not a reason to accept the first financing offer, because the range between the cheapest and most expensive ways to pay is wide.

Source: Freddie Mac Primary Mortgage Market Survey, as published at freddiemac.com/pmms. National averages for conforming loans; your rate depends on credit, points, loan size and property.

The rate context: secured against unsecured

If you own a home with equity, a secured product is normally cheaper per dollar than an unsecured one, because the lender can recover the debt from the property. Freddie Mac publishes the national average mortgage rates that secured products are priced against, and the table below is that survey. It is a national average, not your rate, and it is the honest benchmark for a home equity quote.

A home equity loan or line of credit puts the home at risk if you default, which is a material fact rather than a detail. An unsecured personal loan costs more but cannot take the house. The Federal Reserve H.15 bank prime rate is the reference many unsecured consumer lenders price against, and it is the rate used in the worked example below.

The four financing routes

**Contractor financing.** Convenient and arranged at the kitchen table. The contractor is usually paid a fee by the finance company, and that fee is built into your rate. Ask for the cash price as well, because the two are not the same.

**A home equity loan or line of credit.** Usually the cheapest per dollar if you have equity and qualify. Closing costs may apply, and the lender can take the home on default.

**A personal loan.** Unsecured, fast and fixed term. More expensive than secured borrowing and usually cheaper than contractor financing for a comparable amount.

**A credit card.** The most expensive route unless the balance is cleared inside a promotional window. Use it for a deposit at most.

• Get three written quotes that itemise equipment, labour and permits.
• Ask each contractor for the cash price and the financed price.
• Confirm who holds the warranty and what it covers.
• Check the contractor's licence and insurance in your state or province.

A worked repayment example

The example below uses the Federal Reserve H.15 bank prime loan rate and a standard amortising schedule. It is arithmetic from a published rate, not a quote, and it lets you test the contractor's plan against an independent benchmark.

Worked example, with the assumption stated: $9,000 borrowed at the Federal Reserve H.15 bank prime loan rate of 6.75% (published 2026-09-16) repaid over 60 months on a standard amortising schedule. That gives a monthly payment of $177.15, total interest of $1,629.07 and a total repayment of $10,629.07. This is arithmetic from a published rate, not a quote: a real APR includes fees and is set by the lender from your credit, so your figures will differ. A 36-month term on the same balance costs more per month and less in total interest, so compare both against the contractor's plan before choosing.

If the contractor offers an interest-free period, ask whether it is a true no-interest plan or a deferred-interest plan. The difference is whether interest is backdated if the balance is not cleared in time, and it can be the difference between a free loan and an expensive one.

How to compare HVAC quotes

A proper quote begins with a load calculation, not a rule of thumb based on square footage. The calculation determines the capacity the house actually needs, and an oversized system short-cycles, wears faster and costs more to run. Ask whether a load calculation was performed and ask for the result.

Compare the efficiency ratings on the same basis. In the United States, air conditioners and heat pumps are rated by SEER2 and furnaces by AFUE; in Canada, HSPF and AFUE are the common figures. A quote that names the model and its rating is comparable; one that names only a brand is not.

• Ask for the model number and efficiency rating of the equipment quoted.
• Ask whether the quoted price includes permits and the disposal of the old unit.
• Ask whether ductwork or refrigerant lines will be replaced or reused.
• Ask what the labour warranty covers and for how long.

Rebates, tax credits and the order of operations

Energy Star publishes the efficiency thresholds for equipment that qualifies for federal tax credits and many utility rebates, and those programmes change from year to year. The right order is to establish the qualifying equipment, then claim the rebate, then finance only the net amount. Financing the gross price and waiting for a rebate means paying interest on money you were going to get back.

Ask the contractor which rebates and credits the quoted equipment qualifies for and who files the paperwork. Some contractors handle it, some do not, and a rebate that is never claimed is a discount you gave up. Get the answer in writing before you sign.

Where these figures come from

Related pages

• Heating and cooling costs by state and province
• Heat pump vs furnace
• Repair or replace your furnace
• Loan payment calculator

Frequently asked questions