AC search spikes 4× in July.
The contractors ranking built the pages in February.

Replacement work, almost without exception. The unit economics aren't comparable: an $89 diagnostic-and-repair service call has gross margin of $30-150, while a system replacement runs $5,000-$25,000 with $1,500-$7,000 in gross profit per job. The contractors who quietly out-earn the rest of their market are the ones whose SEO surface area is built around replacement intent — heat pump installation, furnace replacement, AC replacement cost, ductless mini-split install — rather than the high-volume, low-margin service-call queries. Service-call SEO is a useful entry point that funnels into a maintenance-plan sale, but the replacement queries are where the year-end profit lives. We weight content investment 60/40 toward replacement, even though search volume skews the other direction.

Financing is a buyer-stage SEO discipline in HVAC because the average ticket forces it. Homeowners researching a $12,000 furnace replacement search 'HVAC financing,' '0 APR HVAC,' 'GreenSky HVAC,' 'Synchrony HVAC contractors,' and 'HVAC payment plans' before they've even decided which contractor to call. The contractors whose financing pages rank for those queries enter the consideration set 2-3 weeks earlier than competitors who only show up in 'AC repair near me.' We build dedicated financing pages per partner (GreenSky, Synchrony, Wells Fargo, Service Finance), per APR campaign (0% for 12 months, 0% for 18 months), and per buyer-segment (no-credit-check, military discount, senior-citizen). Most HVAC sites bury financing in a footer link; we treat it as a content tier of its own.

Three distinct lift mechanisms. First, brand+location queries are a real and underserved keyword cluster — homeowners search 'Carrier dealer near me,' 'Trane Comfort Specialist [city],' 'Lennox premier dealer [zip],' and the contractors who claim those queries through dedicated pages and schema markup capture them with comparatively low competition. Second, manufacturer dealer-locator pages are high-domain-authority backlinks that the manufacturers themselves push to dealers; integrating them into your link profile produces measurable trust signal. Third, brand-tier badges (Trane Comfort Specialist, Lennox Premier Dealer, Carrier Factory Authorized) lift on-page conversion 20-40% on the dealer-status landing page itself because the buyer reads them as third-party validation. We treat manufacturer status the way agencies treat industry awards — except dealer status actually moves rankings.

Four to six months before the seasonal peak, every time. HVAC search volume isn't a smooth curve — summer AC queries spike approximately 4x in July versus February, and winter heat queries spike 3x in January versus August. Most agencies wake up to the season and start producing content in May for July's peak. The math doesn't work: Google rarely indexes brand-new pages quickly enough to rank during a 6-8 week peak window. The contractors who win the seasonal surge built the pages in February (for summer) and August (for winter), let them age into Google's index for 4-6 months, and arrived at the peak with established rankings. We bake this into every HVAC engagement — the seasonal content tier is built first, regardless of what month the engagement starts, because the indexing window is the binding constraint.

Almost always split. Commercial HVAC — rooftop units, chillers, building automation, light-commercial packaged systems — is a different audience entirely. The buyer is a facility manager, building owner, or property manager researching a 6-18 month procurement cycle, not a homeowner whose AC stopped working yesterday. The keywords are different ('commercial RTU replacement,' 'chiller maintenance contract,' 'building automation HVAC integrator'), the content is different (case studies, energy-efficiency calculations, BAS integration documentation), and the conversion is different (RFP response, multi-stakeholder approval, often a competitive bid). We typically build commercial as its own /commercial-hvac/ subdirectory with separate schema, separate GBP secondary categories, and separate review velocity tracking. Most HVAC sites bolt commercial onto the residential homepage and capture neither audience well.

It's a real and growing category — and one of the few HVAC verticals where competition is still soft enough that ranking is achievable inside 90 days. Post-2020, homeowner search volume for IAQ-adjacent queries has roughly tripled: whole-house air purifiers, HEPA filtration, UV-light HVAC additions, dehumidifier integration, ERV/HRV ventilation, and humidity control. Most HVAC contractors haven't built dedicated IAQ landing pages — they treat it as an accessory upsell on a furnace install. The contractors who build a real IAQ content tier capture the buyer who started searching with an air-quality concern (allergies, mold, pet dander, COVID-era ventilation) and end up booking a much larger system upgrade than they would have via a typical service call. We treat IAQ as a margin-accretive content tier worth dedicated investment, especially in metros with high allergen counts or older housing stock.

Best fit: HVAC contractors doing $1M-$10M annual revenue with at least one fixed service area, an in-house or outsourced installer crew capable of handling replacement volume, and an existing financing partnership. Below $1M revenue, the per-month investment doesn't pay back fast enough — focus on a tightened-up GBP, review velocity, and one strong replacement landing page rather than full content tiers. Above $10M, the operation typically has multi-location complexity (separate residential, commercial, and new-construction divisions) that warrants senior strategy partnership rather than execution alone. The sweet spot — $2M-$6M residential operations with light commercial mixed in — is where the tier-by-tier content build produces the cleanest 12-month return. We work with both single-location and small multi-location HVAC operations across the US.

Primary category should be 'HVAC contractor.' Secondary categories should be claimed surgically based on which services you genuinely offer and want to rank for — not stuffed indiscriminately, because Google can flag over-claiming as a quality signal. The high-leverage secondaries for residential HVAC: 'Air conditioning contractor,' 'Heating contractor,' 'Furnace repair service,' 'Air conditioning repair service,' 'Heat pump supplier,' and 'Ductwork specialist' if you do duct-replacement work. Add 'Indoor air quality service' if you have a real IAQ offering. For commercial-residential hybrids, add 'Commercial refrigerator supplier' or 'Building automation system dealer' as appropriate. Avoid claiming categories you don't actively service — Google's local-pack algorithm now downweights listings whose service area, photos, and reviews don't match the claimed categories.