"Install an AC, Get a FREE Furnace!" — How Free HVAC Equipment Offers Really Work

You've seen the ads: "Install an air conditioner, get a FREE furnace!" Or free ductwork. Free thermostat. Free air purifier. Free maintenance for life.

Here's the truth from a contractor who has been pricing HVAC projects in the Bay Area for years: nobody gives you anything free. Not us, not the company running the ad, not anyone. Equipment costs money. Labor costs money. The "free" furnace was paid for — by you. It was just moved to a different line of the invoice where you can't see it.

This post explains exactly how these offers work, because once you see the mechanics, you can't unsee them — and you'll never fall for one again.

The Math That Makes "Free" Impossible

A gas furnace costs a contractor real money: the equipment itself, the sheet metal transition, the venting, the gas and electrical connections, and most of a day of skilled labor. Add permits and overhead, and a furnace install has thousands of dollars of hard cost before any profit.

A business that genuinely gave that away on every AC job would lose money on every sale and be gone in a season. The companies running these promotions are not going out of business — many of them are the biggest advertisers in the market. That advertising budget, and the "free" furnace, come from the same place: the total price you pay.

The Federal Trade Commission has had rules about this for decades — its guide on the use of the word "free" exists precisely because "free" offers so often hide the cost in the price of the item you're required to buy. That's not a new trick. It's the oldest one there is.

Where the "Free" Furnace Is Actually Hiding

When you get a quote with free equipment attached, the cost is recovered in one (usually more than one) of these places:

1. The inflated base price. The AC portion of the job is priced high enough to absorb the furnace. A $12,000 AC install becomes an $18,000 "AC + free furnace" package. You didn't get a $6,000 gift — you got a $18,000 system with creative labeling. This is why these companies resist itemizing anything: the whole trick depends on you never seeing what the AC alone would have cost.

2. The downgraded equipment. "Free furnace" almost never means the furnace you would have chosen. It means the cheapest builder-grade unit the company can source — often a basic 80% AFUE single-stage model with the shortest warranty in the lineup. You "save" on a furnace you wouldn't have bought, attached to an AC you overpaid for.

3. The stripped scope. This is the one that costs you the most later. To make the package price work, things quietly disappear: the permit and HERS testing ("we can skip that to keep your price down"), the load calculation (the tonnage gets copied off the old unit), the commissioning readings (the system is never verified to actually perform), duct sealing, electrical upgrades, even the labor warranty. The equipment shows up. The craftsmanship doesn't.

4. The "free ductwork" variant. Same trick, worse consequences. Ductwork done right — properly sized, sealed, and tested for leakage — is skilled work that takes time. "Free" ductwork is whatever can be installed fastest: undersized flex duct, minimal sealing, no static pressure verification. You'll pay for it every month on your energy bill and every summer in the bedroom that never cools.

The Sales Tactics That Travel With "Free"

These offers rarely arrive alone. Watch for the rest of the package:

• The deadline. "This promotion ends Friday." Real pricing doesn't expire in 72 hours. Manufactured urgency exists to stop you from getting a second quote — because the trick only works if you never compare totals.
• The tonight-only discount. A price that drops thousands of dollars if you sign before the salesperson leaves your kitchen was never a real price.
• The payment-focused pitch. "Just $189 a month!" with no total price discussed. Monthly payments hide the total; the total is where the furnace is hiding. (Financing itself is fine — we offer it too — but you should always know the full number you're financing. Our financing guide explains how to evaluate the options.)
• The reluctance to itemize. Ask what the job costs without the promotion and watch what happens. Evasion is your answer.

The FTC's contractor-hiring guidance and the California Contractors State License Board both warn about high-pressure tactics for the same reason: legitimate contractors don't need them.

The 30-Second Test for Any HVAC Promotion

You don't need to be an expert to defuse this. Ask one question:

"What is your price for this exact equipment and scope of work — without the promotion?"

A fair contractor answers immediately, because their price is their price. A promotion-driven contractor will stall, re-pitch the package, or "check with the manager" — because answering honestly would reveal that the package and the regular price are the same number wearing different clothes.

Then do the thing every guide (including ours) tells you to do: get at least three quotes for the same scope and compare totals. Not discounts, not freebies, not monthly payments — total installed price for the same equipment tier, same sizing process, same permits and testing, same warranty. If the "free furnace" company isn't clearly cheaper in total, you have your answer. In our experience, they almost never are.

Why Galaxy Doesn't Play This Game

We could run these promotions. The math is easy to engineer, and the phones ring when you promise free things. We don't, for a simple reason: we know it's a trick, and our customers eventually would too.

Instead, here's our version of a promotion, available year-round:

• A fair, transparent price — we publish real cost ranges in our Bay Area installation cost guide and our ultimate HVAC cost guide so you can check our numbers before we ever visit
• An itemized scope — exact model numbers, sizing from a real Manual J load calculation, ductwork and electrical spelled out, permits and HERS testing included, commissioning readings provided
• A 5-year labor warranty in writing, on top of full manufacturer warranties — installed by our own employees, never subcontractors
• No deadlines, no tonight-only prices, no games — our quote is good whether you sign today or after you've collected two more

When we do run seasonal offers, they're straightforward dollar amounts off a transparent price — never "free" equipment with the cost buried in the total.

If your system is aging and you're weighing options, start with our guide on when to replace your HVAC system — and when you're ready for a number you can actually compare, we're happy to be one of your three quotes. We'll win on the total, not the packaging.

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About Galaxy Heating & Air Conditioning

Galaxy Heating & Air Conditioning provides professional HVAC installations across the San Francisco Bay Area. We hold California Contractor License #1076868, our technicians are NATE certified and EPA 608 certified, and every installation includes a 5-year labor warranty plus full manufacturer warranties (up to 12 years with Mitsubishi Diamond Elite and Daikin authorized dealer benefits).

Call (925) 578-3379 or request a free estimate online.

We serve Concord, Walnut Creek, Pleasant Hill, Lafayette, Orinda, Danville, San Ramon, Dublin, Pleasanton, Livermore, Oakland, Berkeley, Alameda, Richmond, San Pablo, Pinole, Hercules, San Mateo, Burlingame, Millbrae, Palo Alto, Mountain View, Cupertino, Sunnyvale, San Jose, and 50+ other Bay Area cities.

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Licensed CSLB #1076868 | NATE Certified | EPA 608 Certified