Suffolk County's Premier Heating Contractor

From rooftop heating systems to residential furnaces, we provide reliable heating service, repair, and maintenance for clients across Long Island.

Long Island Heating Services

Commercial & Residential Heating That Keeps You Operational Year-Round

Temperature Control Systems provides expert heating services for businesses and homeowners across Suffolk County, NY. Whether you manage a warehouse, office, retail space, or simply want peace of mind at home, our technicians deliver fast, professional service for all types of heating systems.

We specialize in rooftop units, furnaces, and multi-zone commercial heating equipment, and we also provide seasonal tune-ups and emergency service for residential clients.

For more advice on managing your commercial HVAC system, explore our blog resources.

Heating Systems We Service Across Long Island

With more than 6,000 completed projects since 1999, our team works on a wide range of heating equipment used in commercial and residential properties.

Rooftop Heating Units
Forced Air Gas Furnaces
Electric & Oil Furnaces
Radiant Heat Systems
Heat Pumps & Hybrid Systems
Thermostat & Control Panel Upgrades
Ducted & Ductless Zone Heating

Heating Projects Completed On Long Island

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Our Services

Commercial Refrigeration

Keep your walk-ins, reach-ins, and display cases running 24/7. We service restaurants, delis, and grocery stores across Suffolk County with emergency repairs and preventative maintenance to protect your inventory.

Air Conditioning Installation

New construction or replacing that 20-year-old unit that’s barely keeping up? We size systems properly (most companies don’t), handle all permits, and get your AC running right the first time.

Furnace Installation

Installing new furnaces across Suffolk County for over 25 years. Gas, oil, or electric – we measure your house properly, size the system right, and complete most installs in 6-8 hours with minimal disruption.

Heat Pump Installation

Heat pumps are getting crazy popular because one unit does heating AND cooling. Way more efficient than old oil furnaces, and your electric bills drop like crazy. We install them right so they work in our Long Island winters.

Air Conditioning Repair

Your AC died in the middle of July? We get it – happens to everyone. Our trucks are stocked with parts for most major brands, so we usually fix it on the first visit without the “I’ll have to order that” runaround.

Emergency Heating

Heat died at 2AM when its 15 degrees outside? We answer our phones 24/7 and keep emergency trucks ready because heating problems don’t wait for business hours. Usually there within 90 minutes.

Boiler Installation

Radiant heat is incredible when it works right. We install high-efficiency boilers for homes and commercial buildings, handle all the zone controls, and make sure every room gets the heat it needs.

Commercial HVAC Installation

King Kullen, medical buildings, warehouses – we handle commercial installs that need permits, crane rentals, and weekend work so we don’t disrupt your business. Rooftop units, split systems, whatever you need.

Air Conditioning Maintenance

A $129 spring tune-up prevents a $4,000 emergency replacement in August. We clean coils, check refrigerant levels, test electrical connections, and catch small problems before they become expensive ones.

Furnace Repair

Weird noises coming from the basement? Heating bills climbing for no reason? We diagnose and fix gas, oil, and electric furnaces fast. Most repairs done same-day with our fully-stocked service trucks.

Boiler Repair

Leaking boiler? No heat in half the house? Pressure issues? We work on all boiler types and actually understand hydronic systems. Most techs don’t – we’ve been doing this since 1999.

Commercial Heating

Retail stores, restaurants, office buildings – when your commercial heat goes down, you lose money fast. We service and install commercial heating systems throughout Suffolk County with minimal downtime and proper maintenance scheduling.

Trusted for Heating Service Across Suffolk County

They fixed our rooftop heating unit fast and under budget. Perfect for our restaurant.

Jerry T

Ronkonkoma, NY

We use them every fall for inspections. Zero breakdowns in 3 years.

Sandra M

Oakdale, NY

The only company I trust for heating issues at home and work.

Nina D

Riverhead, NY

Our Service Areas

We’ve been servicing HVAC systems across Suffolk County for over 25 years. Our trucks are on the road every day from Huntington to Montauk, and we know Long Island homes inside and out. If you’re in Suffolk County, we’re already in your neighborhood.

Ronkonkoma

Our home base since 1999 – we’re your neighbors servicing furnaces, AC units, and commercial HVAC throughout the community.

Islip

Complete heating and cooling services for Islip, East Islip, and Central Islip homes and commercial properties.

Huntington

Fast response times for heating and cooling emergencies across Huntington, Huntington Station, and surrounding areas.

Babylon

Serving Babylon, West Babylon, and North Babylon with reliable furnace installation, AC repair, and emergency HVAC services.

Patchogue

From emergency furnace repairs to new AC installations, we service homes and businesses throughout the greater Patchogue area.

Brookhaven

Full-service HVAC coverage for Brookhaven Town – from residential furnace repairs to commercial heating installations.

Smithtown

Trusted HVAC contractor for Smithtown families and businesses – same-day service available for heating and cooling emergencies.

Heating System Tips & Maintenance Advice

HVAC Energy-Saving Tips for Suffolk County Businesses

Cut energy costs with energy-efficient HVAC Suffolk County solutions. Discover practical tips to optimize your commercial heating and cooling systems today.

October 20, 2025

Top Tips for HVAC for Restaurants in Suffolk County

Discover essential tips for HVAC for restaurants in Suffolk County. Learn about efficient cooling, ventilation, and heating solutions to keep your dining space comfortable year-round.

September 23, 2025

Frequently Asked Questions About Our Heating Services

Here’s what Suffolk County customers ask most about our heating repairs, maintenance, and emergency service.

What types of commercial heating systems do you work on?

We specialize in rooftop units, gas furnaces, and multi-zone heating systems for large facilities.

Do you offer emergency heating repair?

Yes, we provide 24/7 emergency response for heating failures across Suffolk County.

Can I sign up for scheduled maintenance?

Absolutely. We offer routine heating service plans for both commercial and residential clients.

Do you install new heating systems?

Yes. We handle full replacements, system upgrades, and new installs.

What brands do you service?

We work with all major heating equipment brands, including Trane, Lennox, Carrier, Goodman, and more.