303 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Genoa: G & R Heating and Air, CR Score 62/100; 4.8★ from 2,067 Google reviews; open 24/7.
Best for emergencies (open 24/7): Lifeline Plumbing, Heating & Cooling, posts 24/7 hours; ranked #2 of 303.
Most-reviewed: Lifeline Plumbing, Heating & Cooling, 3,222 Google reviews at 4.9★, the most of 303 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
303 Genoa HVAC contractors are ranked here by CR Score, from ten published factors. 150 are open 24/7, 212 open Saturdays and 174 open Sundays, based on posted hours. The median Google rating is 4.9★ across 303 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | G & R Heating and Air | 62 | 4.8★ (2,067) | Gilberts, 17 mi away | 24/7 | Overall |
| 2 | Lifeline Plumbing, Heating & Cooling | 62 | 4.9★ (3,222) | Elgin, 22 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Service Now Home Services | 62 | 4.9★ (879) | DeKalb, 14 mi away | 24/7 | — |
| 4 | Climate Control Services LLC | 62 | 5.0★ (776) | Elgin, 17 mi away | 24/7 | — |
| 5 | Kustom Heating and Cooling | 62 | 5.0★ (1,021) | Elgin, 19 mi away | 24/7 | — |
| 6 | Leith Heating and Cooling Inc. | 62 | 5.0★ (784) | Elgin, 18 mi away | 24/7 | — |
| 7 | Smith-Dahlquist, Inc. | 62 | 4.9★ (194) | Sycamore, 7 mi away | 24/7 | — |
| 8 | CKA Mechanical Inc. | 62 | 5.0★ (153) | Hampshire, 8 mi away | 24/7 | — |
| 9 | Assured Appliance & Heating & Air | 61 | 4.8★ (62) | Genoa | 24/7 | — |
| 10 | Woodstock Heating, Cooling & Electrical | 61 | 4.9★ (1,222) | Woodstock, 20 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.8★ from 2,067 Google reviews, listed on Google as “HVAC contractor”.
Based in Elgin, 22 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 3,222 Google reviews, listed on Google as “HVAC contractor”.
Based in DeKalb, 14 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 879 Google reviews, listed on Google as “Heating contractor”.
Based in Elgin, 17 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 776 Google reviews, listed on Google as “HVAC contractor”.
Based in Elgin, 19 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 1,021 Google reviews, listed on Google as “HVAC contractor”.
Based in Elgin, 18 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 784 Google reviews, listed on Google as “HVAC contractor”.
Based in Sycamore, 7 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 194 Google reviews, listed on Google as “HVAC contractor”.
Based in Hampshire, 8 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 153 Google reviews, listed on Google as “HVAC contractor”.
Based in Genoa
Ranked #9 because of its Google rating and trade focus: 4.8★ from 62 Google reviews, listed on Google as “HVAC contractor”.
Based in Woodstock, 20 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 1,222 Google reviews, listed on Google as “HVAC contractor”.
Based in Lake in the Hills, 22 mi away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 1,374 Google reviews, listed on Google as “HVAC contractor”.
Based in Woodstock, 19 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 747 Google reviews, listed on Google as “HVAC contractor”.
Based in DeKalb, 11 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 129 Google reviews, listed on Google as “HVAC contractor”.
Based in Sycamore, 8 mi away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 128 Google reviews, listed on Google as “HVAC contractor”.
Based in Hampshire, 9 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 229 Google reviews, listed on Google as “HVAC contractor”.
Based in Rockford, 16 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 463 Google reviews, listed on Google as “HVAC contractor”.
Based in DeKalb, 12 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 209 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 22 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 1,043 Google reviews, listed on Google as “HVAC contractor”.
Based in Huntley, 23 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 820 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 21 mi away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 571 Google reviews, listed on Google as “HVAC contractor”.
Based in Genoa
Ranked #21 because of its Google rating and trade focus: 4.8★ from 21 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Elgin, 19 mi away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 351 Google reviews, listed on Google as “HVAC contractor”.
Based in Geneva, 25 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 1,224 Google reviews, listed on Google as “HVAC contractor”.
Based in DeKalb, 15 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 127 Google reviews, listed on Google as “HVAC contractor”.
Based in Crystal Lake, 22 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 744 Google reviews, listed on Google as “Furnace repair service”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 303 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| A & J General | 5.0★ (2) | 20 mi |
| A Hartlett & Son | 4.5★ (2) | 20 mi |
| Advantage Plumbing, Heating & Air Conditioning | 4.7★ (4,045) | 23 mi |
| Air Management Services Inc | 4.0★ (2) | 23 mi |
| Alex’s Duct Cleaning | 5.0★ (269) | 23 mi |
| AM to PM Heating & Cooling | 5.0★ (2) | 20 mi |
| Boone County HVAC/R Services | In Genoa | |
| Conservative Heating & Air Conditioning | 3.0★ (2) | 19 mi |
| Countryview heating and cooling | 5.0★ (2) | 22 mi |
| D & D Comfort Inc. Heating & Air Conditioning, Inc. | 4.9★ (110) | 15 mi |
| Dad And Son LLC | 5.0★ (2) | 17 mi |
| Heating & Cooling | 5.0★ (2) | 24 mi |
| LE Heating And Cooling | 5.0★ (2) | 17 mi |
| Newton's HVAC | 5.0★ (2) | 5 mi |
| Nick's Action Air | 5.0★ (2) | 18 mi |
| Northway Heating, Cooling & Sheet Metal, Inc. | 5.0★ (2) | 15 mi |
| One Call Heating & Cooling | 5.0★ (2) | 9 mi |
| Ron's Heating & Air Conditioning - 24 h/r emergency service | 4.6★ (47) | 8 mi |
| Service Concepts Inc - Commercial Heating and Cooling - Genoa, IL | 3.0★ (2) | In Genoa |
| ZN Heating and Cooling, Inc | 5.0★ (2) | 8 mi |
National price ranges in USD, not adjusted for Genoa. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Illinois, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 303 Genoa HVAC contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Genoa data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |