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Top-Rated Tankless water heater installers in Commack - Updated Nov 2026

Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
4.4(
244
)
Tankless Water Heater - Install

Serving Commack, NY and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"From the moment Ryan came through the door We felt that we were in good hands!! From Ryan, Vedil and Mike they did a great job installing our new hot water heater!! No issues at all !! I highly recommend these pros to anyone and will use them again !! Thanks guys !!"
Shower Fixtures
Installation
Truck
Best of L.I. Winner 2024
Angi 2022 Super Service Award Winner

+86

Response time11 hrs
130 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Excellent Plumbing & Heating
Excellent Plumbing & Heating
4.9(
28
)
Tankless Water Heater - Install

Serving Commack, NY and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"These guys are fabulous! They arrived on time, took the time to troubleshoot the problem, worked professionally, courteously and neatly! Kept me informed throughout the entire process and quickly got me a new water heater installed in less than 3 hours at half the price, half the time and zero problems my friend had 2 months ago! I will sing their praises and will refer them forever! They left me 100% satisfied with their clean up and efficiency! Do not hesitate to use them, they are wonderful!!!"
Oil to Gas Conversion
Response time3 hrs
Response rate99%
Recommended by42%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Tankless Water Heater - Install

Serving Commack, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Tom was terrific....repaired boiler....cost reasonable.....explained everything so clearly so that even this 88year old understood it....experience with company from start to finish was a pleasure"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Santise Plumbing & Heating, LLC
Santise Plumbing & Heating, LLC
5.0(
4
)
Tankless Water Heater - Install

Serving Commack, NY and surrounding areas

Approved

In business since 2020

Small jobs welcome

Credit card accepted

Licensed and insured Master Plumber with over 10 years of experience in the plumbing industry, we are the experts you need to take care of your home or business. We handle everything from remodels to water heaters. We will treat your home as we would treat our own. Give Santise Plumbing & Heating a call today, we look forward to working with you!

Boiler x-209
Boiler - x-209
1
2
1

+1

Response time4 hrs
Recommended by100%of homeowners
Avatar for Four Points Mechanical
Four Points Mechanical
4.5(
17
)
Tankless Water Heater - Install

Serving Commack, NY and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Excellent! Jimmy was on-time - his work was perfect - installed new kitchen faucet and totally replaced bathroom tub/shower fixture - had to cut through sheet rock, he replaced and repaired -completely cleaned up everything. Will definitely use Four Points again and recommend them highly."
Response time8 hrs
Recommended by100%of homeowners
Avatar for BERARDI ELECTRICAL CONTRACTING, INC.
BERARDI ELECTRICAL CONTRACTING, INC.
3.7(
72
)
Tankless Water Heater - Install

Serving Commack, NY and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Leo and Bernardi Electrical were phenomenal, from contact to cleanup. Work was impeccable, showed up on time, came prepared, guided me in choice of units to purchase, made sure all were properly wired, Great communicator, easy to work with, follow up was great, made sure I was happy with work and that a everything worked to my satisfaction and that my expectations were met. In truth my expectations were exceeded. Having Leo around was like having a brother in the business. The guy and work was the best."
Lido beach NY
Lido beach NY
Lido beach NY
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
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