HVAC lead generation has a split personality, and it trips up a lot of owners. Replacement and install work is a big-ticket, considered purchase: the homeowner is getting quotes, maybe lining up financing, and deciding over days or weeks. Service and repair work is the opposite — the AC died in a heat wave, and the homeowner is calling down the list until someone answers. Those two jobs need different lead sources and different follow-up, and buying one when you need the other is how good money buys bad leads.
Layer on seasonality — cooling peaks in summer, heating in winter, dead spots in the shoulder months — and pay-per-lead budgeting gets spiky. Lead costs rise exactly when demand spikes and everyone is bidding. Planning around that is half the battle.
Replacement and install leads
For big-ticket replacement, you want homeowners who are actually shopping to replace a system, ideally ready for financing. Modernize is built for exactly this kind of considered, replacement-style purchase. Pricing is dynamic and consultation-based — no public flat rate — and their own marketing cites “10M+ homeowner inquiries, 400K+ leads delivered, 50 states” (per modernize.com). Modernize fits the replacement and install side of your business; it is not built for emergency repair.
The catch with replacement leads is the timeline. The homeowner won’t sign on the first call, so your follow-up sequence matters as much as the lead itself. A replacement lead you call once and forget is wasted money; the same lead nurtured over a couple of weeks closes.
Service and repair leads
Emergency service is won on the phone, by whoever answers first. That makes Google Local Services Ads (LSA) the strongest single channel for most HVAC service businesses. Your listing appears at the top of search with a verification badge, you pay only when a customer calls, messages, or books (not per click), and because the homeowner chose you, the leads behave like exclusive leads. You set an average weekly budget; the monthly max works out to weekly budget × 30.4 ÷ 7.
One current detail to get right: as of October 20, 2025, Google retired the old “Google Guaranteed,” “Google Screened,” and “License Verified by Google” badges and unified them into a single blue “Google Verified” badge, and discontinued the old money-back guarantee (per Google Local Services Help). If an older guide is still selling you on the “Google Guaranteed” money-back promise, it’s out of date. To run LSA you’ll need license and insurance verification, a background check, and a verified Google Business Profile.
The generic marketplaces fill gaps. Angi brings shared homeowner volume on an annual-membership-plus-pay-per-lead model (price quoted after signup). Thumbtack lets you set a max price per lead and a weekly budget with no mandatory subscription, paying only when a customer responds. Networx offers both shared and exclusive plans, with published bands of $10–$100+ per shared lead and $15–$120+ per exclusive lead (exact price in your dashboard, per help.networx.com). On shared leads, assume you’re racing several other HVAC shops, which brings us to the real decider.
Shared vs. exclusive, and why speed wins service work
A shared lead goes to multiple contractors at once; an exclusive lead is yours alone. Exclusive costs more per lead but converts far better, and for emergency service the gap is brutal: the homeowner with no AC books the first company to pick up, so a shared service lead you reach second or third is often already gone. This is why fixing your response time usually beats buying more leads. You can have the best LSA budget in town and still lose the call you didn’t answer.
LeadTruffle is built for this. It pulls your lead sources — website forms, phone, Google LSA, Facebook, Thumbtack, Yelp, Angi — into one inbox and responds instantly by SMS, email, or AI voice, does missed-call text-back, and runs a 24/7 AI voice agent that qualifies leads, filters spam, and books into your CRM. It integrates natively with Jobber, Housecall Pro, ServiceTitan, and Workiz, among others. Published pricing is $229/mo (150 leads), $399/mo (300 leads), and $629/mo (500 leads), plus a $299 one-time onboarding, month-to-month with no contract (per leadtruffle.co/pricing). It’s a conversion layer, not a lead source. The missed-call dollar math is worth running before you write off the cost — we lay it out in our guide to AI receptionist software, and HVAC emergency calls are the textbook case. Skip it only if you genuinely answer every call live, day and night, in peak season.
Your cheapest leads are the customers you already have
HVAC has a structural advantage: every install is a future service call, and every aging system is a future replacement. The reactivation campaigns built into your field software are some of the highest-ROI “lead generation” you’ll do, because you’re not buying a stranger, you’re re-engaging someone who already trusts you. ServiceTitan‘s Marketing Pro add-on runs email campaigns to existing customers (think aging-equipment and expiring-membership outreach), automates review requests and listings, and integrates Google Ads with dynamic call tracking that ties calls to revenue (no public pricing; quote-based, best for larger operations already on ServiceTitan). Jobber‘s Marketing Suite ($79/mo add-on on all plans except Lite) sends automatic Google review requests, runs email campaigns to segments like “lost leads,” and includes a Referrals product with tracking. Housecall Pro has built-in Campaigns (postcards, email, SMS), automated reminders and follow-ups, and review management (Basic from $59–$79/mo, Essentials $149–$189/mo, MAX custom, per housecallpro.com/pricing). None of these sell you marketplace leads; they squeeze more jobs out of the relationships you’ve already paid to win.
Reviews tie it together. Recent five-star reviews lift your LSA and map ranking, lowering your cost per lead everywhere. NiceJob automates review requests by email and SMS after each job and runs tracked referral campaigns (Reviews $75/mo, Pro $125/mo, 14-day free trial, per get.nicejob.com/pricing).
Putting it together
Build your foundation on the channel you own — LSA plus a review engine — because it carries your service work and gets cheaper as your reviews grow. Use Modernize for replacement shoppers and treat Angi, Thumbtack, and Networx as overflow, leaning exclusive when the math works. Plan your pay-per-lead spend around your seasonal peaks so you’re not overpaying at the top of summer. And before you buy another lead, make sure you can answer the phone in seconds, because in HVAC that’s the difference between a booked job and a competitor’s booked job. For the full software stack, see our best AI tools for HVAC contractors, and for how HVAC fits the bigger picture, our pillar guide to the best lead generation companies for contractors.
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Michael is the founder of Augmented Trades, an independent site that tests and reviews AI tools for trade contractors. Tools are recommended on fit for your shop — affiliate partnerships never decide coverage.