CARR vs MAIR: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: CARR is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. CARR and MAIR share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined CARR and MAIR exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Carrier Global Corporation is a global leader in intelligent climate and energy solutions. After spinning off from United Technologies in 2020, it sold its Fire & Security and Commercial Refrigeration businesses and acquired Viessmann Climate Solutions in 2024 to become a pure-play climate company. Its portfolio spans HVAC, refrigeration and cold chain transportation through brands including Carrier, Viessmann, Toshiba, Automated Logic and Carrier Transicold. The business is organized into four segments: Climate Solutions Americas, Climate Solutions Europe (home to Viessmann), Climate Solutions Asia Pacific Middle East Africa, and Climate Solutions Transportation. Full year 2025 net sales were roughly $21.75 billion, and trailing twelve-month revenue reached about $22.1 billion by mid-2026.

Full CARR guide

Madison Air Solutions Corporation (NYSE: MAIR) designs and manufactures indoor air quality, heating, air movement, filtration and cooling systems, selling through a portfolio of well-known brands including Big Ass Fans, Nortek Air Solutions, AprilAire, Broan-NuTone, Reznor and Roberts-Gordon. Founded by Larry Gies in 2017 and headquartered in Chicago, the company serves data centers, healthcare, manufacturing, education and residential housing, and it completed a large NYSE IPO in 2026 (priced at $27 per share).

Full MAIR guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• CARR drivers: Data center cooling boom; Heat pumps and electrification of heat.
• MAIR drivers: AI data center cooling; Multi-brand platform breadth.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Residential and light commercial HVAC is cyclical and sensitive to housing activity, interest rates and consumer spending, and organic revenue has recently been roughly flat to slightly negative. For MAIR, the ebm-papst acquisition is now the largest single risk: it is roughly 40% of the company's market value, adds about $2.8 billion of debt and cash funding on top of roughly $3.19 billion of existing debt, and requires integrating a large German manufacturer.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick CARR if you believe its drivers more; MAIR if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the CARR and MAIR guides.

CARR. As of October 16, 2026 CARR traded near $55 with a market cap around $46 billion, down from about $58 billion in July. The trailing GAAP P/E near 40x overstates the multiple because GAAP earnings carry charges, while the forward P/E of about 17x on 2027 consensus EPS near $3.31 is well below where the stock traded in the summer. Q2 2026 beat on revenue and EPS, and the valuation now leans on data center and commercial HVAC growth continuing while the residential cycle recovers.

MAIR. The multiple has compressed sharply since mid-2026: price-to-sales fell from about 6x to about 3x and the forward P/E sits near 19, as the market priced in the dilution and leverage of the roughly $5 billion ebm-papst purchase. Operating results have kept growing at about 20% with an earnings beat in the second quarter and a raised revenue outlook, so the debate has moved from whether the growth is real to whether the acquisition is worth its cost. The nine covering analysts average a target near $38.67, though RBC trimmed its target to $35 in October.

Headline figures (approximate, October 2026): CARR shows revenue (ttm) ~$22.1B, q2 2026 revenue ~$6.35B, up ~3.9% YoY, adjusted eps (q2 2026) $0.86 vs ~$0.82 est., net income (ttm) ~$1.17B (~5.5% margin); MAIR shows revenue (ttm) ~$3.75B; Q2 2026 ~$991M, up ~21% year over year, margins (ttm) ~39% gross, ~20% operating, ~3.7% net, net income (ttm) ~$142M; Q2 2026 EPS ~$0.31 vs ~$0.24 consensus, p/e trailing / forward ~47x / ~19x.

CARR and MAIR are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined CARR and MAIR exposure against your real portfolio. It is not an investment adviser.