Analyzing 9,863,3979.9M ReviewsFor 27,77127.8K Experts

Experts Reviews · Company report
Zark Heating & Cooling Inc. logoHow the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%97+52.9Reliability 24%96+23.3Value 14%100+14.1Replies to reviews 7%100+7.1Experts Score= 97Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.97SCORE

Zark Heating & Cooling Inc.

Joliet, IL · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #2Position by Experts Score among all companies we track in this category. of 10 boiler installers · 5.0★ from 891 Google reviews

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Report card

Percentile vs other boiler installers (100 = best)Each factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: craft & service and value; weakest: reliability.

SatisfactionSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Zark Heating & Cooling Inc. is better than 97% of boiler installers.A
97
ReliabilityReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Zark Heating & Cooling Inc. is better than 96% of boiler installers.A
96
Craft & serviceCraft & service · 0% of the scoreGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Zark Heating & Cooling Inc. is better than 100% of boiler installers.A
100
ValueValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Zark Heating & Cooling Inc. is better than 100% of boiler installers.A
100
MomentumMomentum · 0% of the scorePenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Zark Heating & Cooling Inc. is better than 100% of boiler installers.A
100
Replies to reviewsReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.Zark Heating & Cooling Inc. is better than 100% of boiler installers.A
100

Reviews for your job

Customers hired Zark Heating & Cooling Inc. for 8 kinds of job.

Zark Heating & Cooling Inc. for thermostat repair

Clear ✕
Jobs reviewedHow many Google reviews are tagged with this job.5
★ on this jobAverage stars on the reviews where the customer tagged this exact job (Google’s “Services” field).5.00
Usually paidThe price range customers picked most often for this job.$1–200
Rank for this jobPosition of this company in the Job match ranking for this job among the companies we track.Its Job match: 88/100.How Job match is calculatedBuilt only from reviews Google tagged “Thermostat repair”:Stars on this job 55%Number of such jobs 25%Overall Experts Score 20%Stars are pulled toward the category average when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.#3 / 6
Said fairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”.100%

All 5 Google reviews tagged “Thermostat repair”

MichaelLocal Guide · 59 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited 2 months ago★★★★★

Honest and professional work! They've done a water heater replacement, AC repair, and furnace maintenance for us. Can't recommend them enough! Same great service on 9/10/26, they were able to get our shop AC up and running quickly! Bill was knowledgeable and through. Excellent job again.

Paid $400–600Great priceA/C system maintenanceDuctless heating & A/C servicesHeating system maintenance+ Responsiveness+ Punctuality+ Professionalism
Helen6 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited 4 months ago★★★★★

They are very professional. Quality work and equipment. They clean up nicely when done. I will recommend them to everyone.

Paid $1–200Reasonable priceA/C system maintenanceHVAC system maintenanceInstall AC+ Responsiveness+ Punctuality+ Quality
Carol10 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 5 years ago★★★★★

Excellent service. Can't say enough good things about Dan. Such a nice young man. Zark is a local heating & AC company in Manhattan so if you are needing anything done on your furnace or AC, Zark is the company to call.

Ductless heating & A/C servicesThermostat repair+ Responsiveness+ Punctuality+ Quality
Ryan2 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 6 years ago★★★★★

Excellent service, great pricing and friendly people. Been using him for many years after being burned by a large local HVAC vendor.

A/C system maintenanceHVAC system maintenanceThermostat repair+ Punctuality+ Professionalism+ Value
Jenr2 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 years ago★★★★★

Rating only, no written review.

A/C system maintenanceHeating system maintenanceHVAC system maintenance+ Responsiveness+ Quality

Price

$2270% vs typical boiler installers

Bar = middle half of what customers paid · gold mark = category median.

Price verdictsGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.

Great price 48%Reasonable 49%Overpriced 2%Not sure 2%

Jobs customers hired them for

JobReviewsCategory typical
HVAC system maintenance144$37–$264
HVAC system repair93$145–$618
Heating system installation75$1.4k–$2.8k
Install AC73$1.6k–$3.2k
Heating system maintenance67$37–$317
A/C system maintenance66$39–$318
Heating system repair63$78–$745
A/C system repair45$216–$611

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