Business Details
45 Years
experience
Emergency
services
Expert HVAC Repair & Installation Services in Gaithersburg, MD
Since 1981, J & K Air Conditioning & Heating has been a trusted family-owned provider of HVAC solutions in Montgomery County, Maryland. Our team specializes in residential and commercial air conditioning repair, heating system installations, and preventive maintenance contracts. We serve Gaithersburg, Clarksburg, Germantown, Rockville, and surrounding areas, offering Carrier and Lennox products with 10-year warranties. Our technicians hold industry accreditations and maintain fully equipped vehicles for same-day service.With decades of combined experience, we prioritize customer satisfaction through transparent pricing, no trip charges, and emergency services available after regular business hours. Our commitment to quality has earned us top ratings in consumer publications and long-term relationships with clients across Maryland and Virginia.
Services
Air Conditioning Repair
Heat Pump Installation
Gas Furnace Service
Air Purification Systems
Duct Installation
Emergency HVAC Service
Service Contracts
Mini Split Systems
Burner Maintenance
Thermostat Upgrades
Details
- Year established: 1981
Highlights and features
- We've provided HVAC services in Montgomery County since 1981
- Our technicians offer 24/7 emergency repair availability
- We install Carrier and Lennox systems with 10-year warranties
- Free equipment estimates with no trip or gas charges
- Worry-free service contracts extend system longevity
What people say
Quality service is extraordinary
Over 30 years relationship
Glowing remarks on Facebook
No trip charges
Top ratings in publications
Services
Air Conditioning Repair
Our certified technicians diagnose and fix all AC brands, restoring cooling performance within hours. We service units from Lennox, Carrier, and Rheem with factory-trained expertise. Emergency repairs available after regular business hours for urgent comfort needs.
Heat Pump Installation
We install energy-efficient heat pumps that provide both heating and cooling. Our team handles permits, old system removal, and ductwork modifications. New installations include programmable thermostats and manufacturer warranty registration for maximum protection.
Air Purification Systems
We install Fresh-Aire UV APCO air purifiers that eliminate odors, allergens, and microbes. Our technicians customize solutions for residential and commercial spaces. Systems use UV light and carbon cells for continuous air cleaning without ozone production.
Service Contracts
Our maintenance agreements include seasonal system checkups, priority scheduling, and repair discounts. Regular maintenance extends equipment lifespan and maintains manufacturer warranties. Contracts cover HVAC components, humidifiers, and air filters.
Duct Installation
We design and install custom duct systems for new construction or renovations. Our sealed ductwork improves energy efficiency and air distribution. Technicians use modern materials to reduce noise and prevent air leakage in residential and commercial buildings.
Questions
What areas do you service?
We serve Montgomery, Prince George's, and Frederick Counties in Maryland plus Fairfax County, Virginia including Gaithersburg, Rockville, and Germantown.
Do you offer emergency HVAC service?
Yes, we provide after-hours emergency service for urgent heating and cooling needs with no additional trip charges.
Are financing options available?
Qualified buyers can choose no-interest financing for 12 months or combine rebates with financing for new Lennox system installations.
What HVAC brands do you work with?
We service all major brands including Carrier, Lennox, Rheem, Goodman, and Honeywell for both repair and installation services.
Do you provide maintenance contracts?
Yes, our service contracts include seasonal tune-ups, priority scheduling, and repair discounts to maintain system efficiency and warranties.
Are tax credits available for new systems?
Federal tax credits up to $2,000 are available for qualifying HVAC installations through December 31, 2025 under the Inflation Reduction Act.
