The machine matters less than the hands that install it. A mid-tier heat pump sized and commissioned correctly will outperform a premium machine guessed onto the wrong house every winter it runs, and Central Ohio's mix of prewar brick, postwar rings, and builder-grade suburbs punishes guessing. This guide is a set of eight tests you can run from a kitchen table, no technical background required. A bidder who passes them is worth paying; a bidder who fails several has told you, cheaply and early, what the installation would have told you expensively in January.
Test One: The Load Calculation
Ask every bidder one question: will you perform a room-by-room load calculation on my house, and will I see it? The only good answer is an unhesitating yes. Sizing by square footage, by the old equipment's nameplate, or by eyeball is how machines end up oversized into short-cycling or undersized onto their resistance strips. This is doubly binding in a replacement market like this one, where copying the old heat pump's tonnage forward, the trap our cold-weather guide dissects, is the most common specification error in the metro.
Test Two: Capacity in Writing
Central Ohio design nights sit in the single digits. Ask what the quoted machine delivers, in BTU per hour, at that condition, and ask for it in writing next to your house's calculated load. Every manufacturer publishes the table; attaching it costs a competent bidder nothing. A quote that offers a nameplate tonnage but no low-temperature capacity figure has not answered the winter question, and the silence is the answer.
Test Three: The Zero-Rebate Tell
This market hands you a vetting gift. As our rebates guide lays out, AEP Ohio pays no heat pump rebate, Ohio has no state program, and the federal 25C and 25D credits ended December 31, 2025. The correct incentive line on a Columbus quote is zero, with one narrow exception for co-op meters at the carve's rural edges. A bidder who folds federal credits into the price, or waves at utility rebates an AEP Ohio address cannot claim, has misstated checkable facts on page one. Staleness on the incentive line is a fair proxy for staleness elsewhere: refrigerant handling, code currency, commissioning practice. Treat it as disqualifying.
Test Four: The Panel Question
Older stock across German Village, Victorian Village, and the early postwar rings often runs 100 amp service, and a whole-home conversion can force new circuits or a service upgrade with real cost and lead time. The honest bidder opens the panel at the site visit and prices the answer into the quote. A quote on an older house that never mentions the panel is not cheaper; it is incomplete, and incomplete quotes grow after signing.
Test Five: Ducts Measured, Not Assumed
Ducts sized for a gas furnace's hot, fast air sometimes run undersized for a heat pump's cooler, steadier supply. The credible bidder measures static pressure and inspects returns rather than assuming the trunks are fine because air came out of them last winter. In the prewar stock, the equivalent test is head placement and line-set routing reasoned aloud: a contractor who has done ductless conversions in century brick talks about it differently than one who is about to learn on your house.
Test Six: Licensing, Permits, and the Paper Trail
A real Columbus bid names its license, pulls permits without being asked, and treats inspection as routine rather than friction. Permits protect you at resale and insurance time, and a bidder who suggests skipping them has volunteered how they handle everything else you cannot watch. The refrigerant on the quote should be R-454B, the current standard; a bid built around outgoing equipment is a bid built around clearing someone's warehouse.
Test Seven: References That Match Your House
Ask for two or three references from projects like yours: a ductless conversion in a brick double if that is your house, a ducted changeout in a Dublin colonial if that is. Central Ohio's housing range means a contractor can be excellent in builder stock and lost in 1910 masonry. Matching references cost the bidder five minutes and tell you more than any review aggregate.
Test Eight: Commissioning, Stated in Advance
Installation ends with measurement, not with the truck leaving. Refrigerant charge verified against the manufacturer's tables, airflow measured, static pressure recorded, controls and backup staging demonstrated, defrost behavior explained. Ask every bidder what their commissioning checklist covers and what documentation you keep. The machines are sold everywhere; commissioning is where good contractors separate, and it is the difference between the published capacity figures and the capacity your house actually receives.
Reading Three Bids Together
Run all eight tests across three bids and the decision usually makes itself. Hold every bidder to the same document set, load calculation, model numbers with capacity tables, duct and panel findings, itemized price, and the spread becomes information: the high bid must justify itself with scope, the low bid must show what it left out, and the middle bid earns nothing by being in the middle. With no rebate arithmetic to hide behind in this market, every dollar on every page is scope, equipment, or margin, and the full price context lives in our installation cost guide.
Timing and Temperament
The best contractors book out, especially at the season's edges, and the worst sales pressure exploits emergencies. If your equipment is past fifteen years old, start the process on your calendar, not the furnace's. And weigh temperament: the bidder who says "I will not know until I measure" is worth more than the one with an instant answer for everything. Measurement is what you are buying.
What the Tests Cannot Catch, and What Covers It
Eight tests filter hard, but no checklist replaces the paper trail that protects you after signing. The contract should name the model numbers, the load calculation's design load, the commissioning deliverables, the permit responsibility, and the warranty terms for both equipment and labor, in writing, before a deposit moves. Warranty language deserves two minutes of actual reading: equipment warranties are the manufacturer's, labor warranties are the contractor's, and the second is the one that varies. Payment schedule is a signal of its own; a modest deposit with the balance at commissioning is standard, and a bidder who wants most of the money before the first tool comes off the truck is asking you to hold their risk. None of this is adversarial. The good contractors put it in writing unprompted, which is, one last time, the test.
Get Your Free Central Ohio Quote
Start your free quote: two minutes, free, no obligation. You will be matched with contractors who pass these tests as a matter of habit: real load calculations, published capacity in writing, honest panels, and no rebates invented for a market that has none.