The machine matters less than the hands that size and set it, and Kentuckiana grades the difference on both ends of its calendar: design nights around ten degrees, and a long Ohio Valley summer whose humidity works cooling equipment as hard as the winter works the compressor. A well-installed mid-tier heat pump outperforms a badly installed flagship in any climate; here the gap between the two installers shows up as strip-heat bills every January and clammy rooms every July. This guide is eight tests, each answerable in a first conversation or a first document, each designed so that a contractor who fails it has told you something you needed to know at the cheapest possible moment.
Test One: The Load Calculation, Performed, Not Estimated
The foundation of every defensible bid is a room-by-room heating and cooling load calculation performed on your actual house: measurements, insulation levels, window areas, orientation, infiltration. In this valley the cooling load deserves the same rigor as the heating load, because it runs more hours and carries the humidity term. The failing answers are familiar and fatal: sizing by square footage, sizing by the old unit's nameplate, sizing by a walk-through glance. A tightened-up Prospect house and a drafty Old Louisville Victorian can share square footage and sit a ton of capacity apart. Ask one question: will you perform a room-by-room load calculation and give me the report? Anything but yes ends the interview.
Test Two: Capacity at Design Temperature, in Writing
The coldest nights here sit around ten degrees, and the bid must show the proposed machine's published heating output at that condition, printed beside your calculated load, per the discipline in our cold-weather guide. Most quality variable-speed machines pass; the test is whether the contractor bothered to check. One who offers nameplate tonnage and reassurance is not doing engineering, and the house will translate the difference into strip-heat bills every snap.
Test Three: The Rebate Line, Stated Correctly
Kentucky's incentive map builds the honesty test in. LG&E and KU pay $400 on a qualifying ENERGY STAR air-source heat pump for accounts on an eligible residential rate; the TVA EnergyRight footprint in far-western Kentucky pays up to $800 with an electric-replacement rule and a Quality Contractor Network installer requirement; the map lives in our rebates guide. The test: does the bidder name the program your address actually qualifies for, confirm the conditions, and show the rebate as a named line? A bidder who promises the wrong program's money, inflates the amount, or cites the federal credits that ended December 31, 2025 as live money has misstated checkable facts on page one. Staleness about money travels with staleness about refrigerants, code, and commissioning.
Test Four: The Humidity Answer
Ask directly: how will this system handle a Louisville July? The fluent answer covers variable-speed operation at part load, sizing that avoids the oversized-machine short-cycle that cools without drying, and what the household should expect on a ninety-degree, soup-air afternoon. A contractor who has commissioned systems through Ohio Valley summers answers from experience; one who talks only tonnage is selling capacity, not comfort. The same machine must then carry the ten-degree night, which is why the two-season specification in the cold-weather guide reads as one document.
Test Five: The Panel Question
The prewar stock, Old Louisville, Germantown, Butchertown, Clifton, Crescent Hill, often runs 100 amp service, and a whole-home conversion can force new circuits or a service upgrade with utility coordination and lead time attached. The honest bidder opens the panel at the site visit and prices what they find; the evasive one discovers it after signing, as a change order. Put the question in the first phone call: what will you check on my electrical panel, and will panel work be itemized in the quote? Full cost context sits in our installation cost guide.
Test Six: Ducts Measured, Licensing, Permits, and R-454B
The postwar and newer stock through St. Matthews, Middletown, Jeffersontown, Prospect, and Shively mostly carries reusable trunks, but ducts sized for a furnace's hot, fast air can choke a heat pump's steadier flow, and undersized returns complain loudest in July. The credible contractor measures static pressure before sizing anything. Licensing and permitting run by jurisdiction across the metro, and the Kentuckiana market adds a state line: the contractor should say fluently who pulls the permit at your address, on either side of the river, and what inspections follow, with insurance certificates on request. Add the 2026-specific line: current quotes should specify R-454B equipment, and a bid built on outgoing refrigerant platforms is a bid built on someone's warehouse problem.
Test Seven: References That Match Your House
Ask for references from projects like yours, and be literal about it. A ducted changeout in a Middletown two-story says little about a multi-head conversion in an Old Louisville Victorian, and neither says much about a baseboard-to-ductless swap in a Shively rental. Then ask each reference a full year's worth of questions: did the sizing hold through the January snaps, did the house stay dry and comfortable through the humid months, and did the bills match what the contractor projected?
Test Eight: Commissioning, the Quiet Divider
The gap between an installed heat pump and a performing one closes at commissioning: refrigerant charge verified by measurement, airflow set to specification, controls and backup staging configured so the strips wait for the nights they were sized for, defrost behavior checked, cooling and dehumidification verified while the crew is still on site. Ask what the commissioning process includes and what documentation you receive. Contractors who treat startup as flipping a breaker leave capacity and efficiency you paid for sitting in the equipment, in both seasons.
How the Eight Tests Behave in a Real Search
Run three bidders through the same document set and the market sorts itself quickly. Expect one bid to arrive fast, low, and paperless; it fails tests one and two immediately, and its price is not a price, it is an estimate of your patience. Expect one bid to arrive high and thorough; make it justify its scope line by line, which a good contractor does without flinching. The bid worth signing is usually the one that produced documents before being asked, showed the correct rebate line for your territory, and answered the humidity question from experience rather than confidence. Price still matters, but only between bids that passed.
The Short Version
Eight tests: a performed load calculation covering both seasons, published capacity at the ten-degree design night, the correct rebate stated with its conditions, the humidity answer from experience, the panel opened and priced, ducts measured with permits and R-454B, references that match your housing stock, and real commissioning. No single test requires expertise to administer; every one requires the contractor to demonstrate theirs. January and July grade the winner together.
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