How much does a Cooling Tower Cleaning & Disinfection cost to buy?

A typical Cooling Tower Cleaning & Disinfection sells for 2.5x to 4x seller's discretionary earnings. With estimated SDE of $240K, expect to pay roughly $600K to $960K before adjustments for assets, debt, growth, and local market quality.

How much does it cost to start a Cooling Tower Cleaning & Disinfection?

Startup costs range from $40K to $150K depending on location, equipment, and scale.

Service

Cooling Tower Cleaning & Disinfection

Q: What are the profit margins for a Cooling Tower Cleaning & Disinfection?

The average profit margin for a Cooling Tower Cleaning & Disinfection is around 40%. Primary costs are technician labor ($28–$45/hr loaded), biocide chemicals, third-party Legionella lab fees ($75–$150/sample), and rooftop access equipment. Liability and workers' comp insurance commonly run 8–12% of revenue.

Hospitals legally cannot let their cooling towers grow Legionella — you stop that for $4K a visit

Bottom line

Attractive margins, but operations need a serious buyer.

Cooling tower cleaning operators decontaminate, disinfect, and disinfect-test the open evaporative cooling towers atop hospitals, data centers, manufacturing plants, and large office buildings. ASHRAE 188 and (in NYC, NJ, and growing) state law require quarterly cleaning and Legionella culture testing — a single 500-ton tower runs $2,500–$6,000 per cleaning, twice a year minimum. Recurring annual contracts on 40–80 towers gross $400K–$1.2M with 35–45% margins. The work is dirty, OSHA-regulated, and almost no general HVAC company touches it — leaving fat margins for specialists.

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Acquisition score

Strong

Avg Revenue

$600K

Profit Margin

40%

Acquisition Multiple

2.5x - 4x

Startup Cost

$40K - $150K

How It Works

Crews of 2–3 OSHA-trained technicians arrive at a building rooftop, lock out the tower, drain and pressure-wash the basin and fill media, scrape biofilm, apply EPA-registered biocide, and pull water samples for a third-party Legionella PCR culture lab. Reports are filed for OSHA/ASHRAE 188 compliance. Most contracts are 3-year, twice-yearly cleanings with quarterly water-treatment add-ons. NYC's Local Law 77 created a permanent compliance market post-2015 Bronx outbreak; states are copying it. Buyers pay 3x SDE because the contract book is sticky and license-mandated.

Revenue Range

Low End

$250K

Typical

$600K

High End

$1.5M

Pros

+Legally mandated by ASHRAE 188 and a growing list of state Legionella laws — non-discretionary spend
+Recurring multi-year contracts with hospitals, universities, and data centers
+High barriers — OSHA confined-space training, water treatment licensing — keep generalists out
+Specialists trade at 3x SDE with sticky contract books

Cons

-Confined-space and rooftop work — workers' comp insurance is expensive
-Legionella outbreak liability is real — must carry $2M+ general liability
-Crew turnover is high — work is physically grueling

Best For

HVAC or water treatment operators in dense metros (NYC, NJ, Chicago, Boston, SF) ready to pursue ASHRAE 188 compliance contracts

Operating Costs

Primary costs are technician labor ($28–$45/hr loaded), biocide chemicals, third-party Legionella lab fees ($75–$150/sample), and rooftop access equipment. Liability and workers' comp insurance commonly run 8–12% of revenue.

SBA Financing Estimator

Adjust the deal — see if it cash flows after debt service

+$1K/mo

after debt service

Deal price — $1.8M

Range: $1.2M (2.5×) to $3.0M (4×+)

Down payment — 15% ($270K)

SBA minimum equity injection is 10% for change-of-ownership

Interest rate — 8.00%

Current prime-based SBA rates: 7.5–10.5%

Loan term — 10 years (120 mo)

Standard SBA 7(a): 10 years for business acquisition

Down payment

$270K

15% equity injection

Loan amount

$1.5M

85% SBA-financed

Monthly payment

$19K/mo

$698K total interest

Monthly profit

$20K/mo

at 40% margin

Monthly cash flow after debt service

+$1K/mo

Down payment paid back in ~188 months — long horizon

Estimates only. Excludes owner compensation, capex, working capital draws, and taxes. Margin assumes average occupancy and volume. Actual SBA terms vary by lender and borrower profile.