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Reliance Mechanical Services is Long Island’s full service HVAC solution!

Here at Reliance Mechanical Services, we offer state of the art Solutions with the highest quality commercial and residential service. At Reliance Mechanical Services we boast a courteous team of expert professionals with years of acquired industry experience. We are here to help you make the right choice for your home or commercial property. We provide 24/7 efficient service and offer service contracts, as well as financing solutions based on your needs. At Reliance Mechanical Services, we are proud to consider ourselves Long Island’s most reliable, full service HVAC contractor. We provide free consultations so we can help you design a package that best suits the need of your property and your finances. Allow us the pleasure of securing the comfort for your residential and or commercial needs. Please feel free to contact our helpful team of consultants today. Click on the “Our Team” page to find out more about you’re your trained comfort consultants. We look forward to hearing from you! Reliance Mechanical Service provides HVAC services to Nassau, Suffolk, Long Island and Queens. Call us at 1 (855) RMS-5255 today. If you are having problems with your home heating systems, check out our furnace repair page.

Go to the Nassau residential HVAC service page, Suffolk residential HVAC page or the Nassau Commercial HVAC , Suffolk commercial HVAC service page.

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Customer Testimonials

Testimonials

I have dealt with many service-oriented firms in my life, and can truly appreciate a quality organization such as yours. I have always had a prompt response from your organization to my service calls and questions.
Rick B.

The professionalism and expertise of your installers was evident as they completed installation work without delay or any inconvenience to our operations.
National Grid

We deal with dozens of trades on our job site and would rank but RMS is one of the top three trades that are a pleasure to do business with. They possess immeasurable work ethic and consistently display a high degree of integrity and professionalism.
Thomas P.

Just a note to thank you for your prompt handling of our service call to repair our air conditioner. Also your repair service man Frank G. was not only efficient, but quiet and neat, above and beyond his requirement.
South Shore Medical Care & Diagnostics



Special Offers
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Nassau HVAC coverage Areas

Albertson 11507
Alden Manor 11003
Allenwood 11021
Argo Village 11003
Atlantic Beach 11509
Baldwin 11510
Baldwin Harbor 11510
Bar Harbor 11762
Barnum Island 11558
Baxter Estates 11050
Bayville 11709
Bellerose Terrace 11001
Bellerose Village 11001
Bellmore 11710
Bethpage 11714
Briar Park 11793
Brookville 11545
Carle Place 11514
Cedarhurst 11516
Centre Island 11771
Cove Neck 11771
East Atlantic Beach 11561
East Farmingdale 11735
East Hills 11548
East Massapequa 11758
East Meadow 11554
East Norwich 11732
East Rockaway 11518
East Williston 11596
Elmont 11003
Far Rockaway 11096
Farmingdale 11735
Floral Park 11001
Franklin Square 11010
Freeport 11520
Garden City 11530
Garden City Park 11040
Garden City South 11530
Glen Cove 11542
Glen Head 11545
Glenwood Landing 11547
Great Neck 11020
Great Neck Estates 11021
Greenvale 11548
Harbor Acres 11050
Harbor Hills 11023
Harbor Isle 11558
Hempstead 11549
Herricks 11040
Hewlett 11557
Hewlett Bay 11557
Hewlett Bay Park 11557
Hewlett Harbor 11557
Hewlett Neck 11598
Hicksville 11801
Inwood 11096
Island Park 11558
Island Trees 11756
Jericho 11753, 11853
Kenilworth 11024
Kensington 11021
Kings Point 11024
Lake Gardens 11022
Lake Success 11020
Lakeview 11552
Lakeville Estates 11040
Lattingtown 11560
Laurel Hollow 11771
Lawrence 11559
Levittown 11756
Lido Beach 11561
Locust Valley 11560
Locustwood 11003
Long Beach 11561
Lynbrook 11563
Malverne 11565
Manhasset 11030
Manhasset Hills 11040
Manorhaven 11050
Massapequa 11758
Massapequa Park 11762
Matinecock 11560
Meacham 11003
Meadowmere Park 11559
Merrick 11566
Mill Neck 11765
Mineola 11501
Mitchell Field 11530
Muttontown 11545
New Cassel 11590
New Hyde Park 11040
North Baldwin 11510
North Bellmore 11710
North Hills 11040
North Massapequa 11758
North Merrick 11566
North New Hyde Park 11040
North Valley Stream 11580
North Wantagh 11793
North Woodmere 11581
Oceanside 11572
Old Bethpage 11804
Old Brookville 11545
Old Westbury 11568
Oyster Bay 11771
Oyster Bay Cove 11771
Plainedge 11756
Plainview 11803
Plandome 11030
Point Lookout 11569
Port Washington 11050
Rockville Centre 11570
Roosevelt 11575
Roosevelt Field 11530
Roslyn 11576
Roslyn Estates 11576
Roslyn Harbor 11545
Roslyn Heights 11577
Russell Gardens 11021
Saddle Rock 11023
Saddle Rock Estates 11021
Sands Point 11050
Sea Cliff 11579
Seaford 11783
South Farmingdale 11735
South Floral Park 11001
South Hempstead 11550
Stewart Manor 11530
Strathmore 11030
Sutton Park 11559
Syosset 11773, 11791
The Terrace 11050
Thomaston 11021
Uniondale 115538
University Gardens 11020
Upper Brookville 115451
Valley Stream 11580
Wantagh 11793
West Hempstead 11552
Westbury 11568
Williston Park 11596
Woodbury 11797
Woodmere 11598
Woodsburgh 11598

Suffolk HVAC Coverage Area

Amagansett 11930
Amity Harbor 11701
Amityville 11701
Aquebogue 11931
Asharoken 11768
Babylon 11702
Baiting Hollow 11933
Bay Hills 11743
Bay Point 11963
Bay Shore 11706
Bayberry Point 11751
Baycrest 11743
Bayport 11705
Beach Hampton 11930
Beech Croft 11743
Belle Terre 11777
Bellport 11713
Blue Point 11715
Bohemia 11716
Box Hill 11780
Brentwood 11717
Bridgehampton 11932
Brightwaters 11718
Brookhaven 11719
Calverton 11933
Canaan Lake 11772
Captree Island 11702
Carver Park 11980
Center Moriches 11934
Centereach 11720
Centerport 11721
Central Islip 11722
Cherry Grove 11782
Cold Spring Harbor 11724
Cold Spring Hills 11743
Commack 11725
Copiague 11726
Coram 11727
Corneil Estates 11770
Crab Meadow 11768
Cutchogue 11935
Davis Park 11772
Deer Park 11729
Deer Wells 11780
Dix Hills 11746
East Hampton 11937
East Islip 11730
East Marion 11939
East Moriches 11940
East Northport 11731
East Patchogue 11772
East Quogue 11942
East Setauket 11733
East Yaphank 11967
Eastport 11941
Eatons Neck 11768
Edgewood 11717
Elwood 11731
Fair Harbor 11706
Farmingville 11738
Fire Island 11770
Fire Island Pines 11782
Fishers Island 6390
Flanders 11901
Flowerfield 11780
Fort Salonga 11768
Gilgo Beach 11702
Gordon Heights 11763
Great River 11739
Greenlawn 11740
Greenport 11944
Halesite 11743
Hampton Bays 11946
Harbor Heights 11743
Hauppauge 11749
Head of the Harbor 11780
Heer Park 11757
Hither Plains 11954

Holbrook 11741
Holtsville 11742
Huntington 11743
Huntington Bay 11743
Huntington Station 11746
Islandia 11749
Islip 11751
Islip Manor 11751
Islip Terrace 11752
Jamesport 11947
Kings Park 11754
Kismet 11706
Knollwood Beach 11743
Lake Grove 11755
Lake Panamoka 11961
Lake Ronkonkoma 11779
Lake Ronkonkoma Heights 11779
Laurel 11948
Lindenhurst 11757
Lloyd Harbor 11743
Lloyd Neck 11743
Manor Park 11950
Manorville 11949

Marconiville 11726
Mastic 11950
Mastic Beach 11951
Mattituck 11952
Medford 11763
Melville 11747
Mid Island 11805
Middle Island 11953
Miller Place 11764
Montauk 11954
Moriches 11955
Mount Sinai 11766
Nassau Point 11935
Nesconset 11767
New Suffolk 11956
Nissequogue 11780
North Amityville 11701
North Babylon 11703
North Bay Shore 11706
North Bellport 11713
North Haven 11963
North Lindenhurst 11757
North Patchogue 11772
North Sea 11968
Northampton 11901
Northport 11768
Oak Beach 11702
Oak Island 11702
Oakdale 11769
Ocean Bay Park 11770
Ocean Beach 11770
Old Field 11733
Old Mastic 11951
Old Westfield 11784
Orient 11957
Orient Point 11957
Panamoka 11961
Patchogue 11772
Peconic 11958
Pine Air 11717
Pine Neck 11963
Point O Woods 11706
Poquott 11733
Port Jefferson 11777
Port Jefferson Station 11776
Promised Land 11930
Quioque 11978
Quogue 11959
Remsenburg 11960
Ridge 11961
Riverhead 11901
Rivers Edge 11950
Rocky Point 11778
Ronkonkoma 11749
Sag Harbor 11963
Sagaponack 11962
Saint James 11780
Saltaire 11706
San Remo 11754
Sayville 11782
Scotts Beach 11789
Seaview 11770
Selden 11784
Setauket 11733
Shelter Island 11964
Shelter Island Heights 11965
Shirley 11967
Shoreham 11786
Smithtown 11745
Sound Beach 11789
South Hauppauge 11722
South Haven 11719
South Huntington 11746
South Jamesport 11970
South Setauket 11720
Southampton 11968
Southold 11971
Speonk 11972
Stony Brook 11790
Strongs Neck 11733
Sunken Meadow 11768
Terryville 11776
Upton 11973
Wading River 11792
Wainscott 11975
Water Mill 11976
West Babylon 11704
West Bay Shore 11706
West Brentwood 11717
West Gilgo Beach 11702
West Hills 11743
West Islip 11795
West Sayville 11796
Westhampton 11977
Westhampton Beach 11978
Westhampton Dunes 11978
Wheatley Heights 11798
Wildwood 11792
Wincoma 11743
Wyandanch 11798
Yaphank 11980

Queens HVAC Service Area

Arverne, NY
Astoria, NY
Bayside, NY
Bellerose, NY
Breezy Point, NY
Cambria Heights, NY
College Point, NY
Corona, NY
East Elmhurst, NY
Elmhurst, NY
Far Rockaway, NY
Floral Park, NY
Flushing, NY
Forest Hills, NY
Fresh Meadows, NY
Glen Oaks, NY
Hollis, NY
Howard Beach, NY
Jackson Heights, NY
Jamaica, NY
Kew Gardens, NY
Little Neck, NY
Long Island City, NY
Maspeth, NY
Middle Village, NY
Oakland Gardens, NY
Ozone Park, NY
Queens Village, NY
Rego Park, NY
Richmond Hill, NY
Ridgewood, NY
Rockaway Park, NY
Rosedale, NY
Saint Albans, NY
South Ozone Park, NY
South Richmond Hill, NY
Springfield Gardens, NY
Sunnyside, NY
Whitestone, NY
Woodhaven, NY
Woodside, NY