"I just had my routine bi-annual service inspection completed on Monday. I wanted management to know their technician (I believe his name is Brad) did a great job. He thoroughly inspected all three units I have (interior and exterior), changed my air filters, took the filter grates outside and cleaned those, cleaned the drain pipes, etc. He was very knowledgeable of my systems and told me the things I needed to keep an eye on. He did not try to sell me on anything I did not need and was the most thorough technician that has performed the bi-annual maintenance." Air Conditioning Repair Service Heating and Cooling Contractor in Mobile, AL, Theodore, AL, Spanish Fort, AL, Grand Bay, AL, Daphne, AL, Fairhope, AL, Robertsdale, AL, Semmes, AL, & Tillmans Corner, AL At Head's HVAC, we always strive to provide knowledgeable and economical solutions to your home and commercial comfort needs.  With nearly four generations of HVAC experience, we deliver a higher level of expertise.  Our NATE-certified technicians have the industry knowledge to provide innovative and cost-saving improvements to your home or commercial facility.  

We are the largest residential air conditioning contractor throughout Mobile, AL, Theodore, AL, Spanish Fort, AL, Grand Bay, AL, Daphne, AL, Fairhope, AL, Robertsdale, AL, Semmes, AL, & Tillmans Corner, AL.  2002 ford focus ac compressor replacementHaving installed around 50,000 systems, our services are recommended by a very long list of satisfied customers.kenmore central ac unit Providing experienced technicians for your heating and cooling needs!car ac repair greenville ncHVAC Repair Company in Mobile, AL, Theodore, AL, Spanish Fort, AL, Grand Bay, AL, Daphne, AL, Fairhope, AL, Robertsdale, AL, Semmes, AL, & Tillmans Corner, AL Head's HVAC is uniquely qualified to handle the temperature control and air quality challenges of your residence or commercial space.  

Our team of expert technicians are extensively trained, experienced, and receive continued updates on advancements in technology, products, and techniques.  We are a Carrier Factory Authorized Dealer, a recognition that is not handed out but earned through the consistent demonstration of exemplary customer service, business management, and equipment understanding.  We address your specific requirements and expectations and answer with highly-efficient, proven reliable systems and precision workmanship.  You can count on Head's HVAC for lasting results, and know there’s never any guesswork involved. For six years, Head's HVAC served as a member of the ACCA board.  ACCA (Air Conditioning Contractors of America) is comprised of over 4,000 contractors who are dedicated to the improvement of the industry by promoting good business practices.  ACCA is the largest association of HVACR contractors and the preferred service provider for members across the nation and worldwide.   We are also EPA certified and a member of RESNET.

Know you can trust in the team at Head's HVAC for all your insulation, air quality, duct sealing/cleaning, and HVAC installation, service, or repair needs! We know how to evaluate your home to recommend and properly install the right air quality products.  Head's HVAC is BPI-certified, having completed rigorous written and hands-on practical exams, demonstrating our knowledge and expertise in building science solutions.  We are qualified in the implementation of important safety and efficiency improvements, such as mold prevention, carbon monoxide testing, and combustion appliance safety checks. Whether you are looking for a heating/cooling upgrade, installation, maintenance, or repair, expect on-time, on budget, and exceptional results from Head's HVAC.  We offer duct cleaning and sealing to further protect your comfort and investment, and a variety of energy saving services, such as Home Energy Audits.  Head's HVAC has the experience, qualifications, and dedication to provide simple, straightforward solutions to your highest expectations.

HVAC Installation in Theodore, AL | AC Repair in Mobile, AL, Theodore, AL, Spanish Fort, AL, Grand Bay, AL, Daphne, AL, Fairhope, AL, Robertsdale, AL, Semmes, AL, & Tillmans Corner, AL Need air conditioning, furnace or heat pump service/repair? Trust Head's HVAC for all of your heating and cooling needs! Our technicians provide nothing but the best HVAC service for our customers, leaving their home looking the same as it was before they started the job! Make sure your air conditioner is serviced this year before the heat really hits! Routine A/C service can help reduce wear and tear, decreasing the chance of costly air conditioning repairs down the road. The technicians at Head's HVAC are also experts at the installation of our highly energy efficient Carrier air conditioners. If you need a new air conditioner installation this year, give us a call (251) 653-7873 for more information. Proudly Serving All of Mobile, AL ‘s Heating and Air Conditioning Repair, Service, and Installation since 1979.

HVAC Repair Company, Air Conditioning Installation, AC Repair & Service, Furnace Repair, Furnace Installation, Heating Service, Heating and Cooling Contractor in Mobile, AL, Theodore, AL, Spanish Fort, AL, Grand Bay, AL, Daphne, AL, Fairhope, AL, Robertsdale, AL, Semmes, AL, & Tillmans Corner, AL HVAC Service Company, AC Service & Installation, Air Conditioner Repair, Air Conditioning Service, Air Conditioning Installation, AC Repair in: Mobile, AL, Tillmans Corner, AL, Grand Bay, AL, Daphne, AL, Theodore, AL, Fairhope, AL, Robertsdale, AL, Semmes, AL, & Spanish Fort, ALNC - Noise Criterion Noise Criterion - NC - level is a standard that describes the relative loudness of a space examining a range of frequencies Noise Criterion - NC - were established in U.S. for rating indoor noise, noise from air-conditioning equipment etc. In Europe it is common to use the Noise Rating Curve - NR. The method consists of a set of criteria curves extending 63 to 8000 Hz and a tangency rating procedure.

The criteria curves define the limits of octave band spectra that must not be exceeded to meet the occupants acceptance in certain spaces. The NC rating can be obtained by plotting the octave band levels for a given noise spectrum - the NC curves. The noise spectrum is specified as having a NC rating same as the lowest NC curve which is not exceeded by the spectrum. Print NC-diagram Noise Criterion Octave Band Center Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 Sound Pressure Levels (dB) NC-15 47 36 29 22 17 14 12 11 NC-20 51 40 33 26 22 19 17 16 NC-25 54 44 37 31 27 24 22 21 NC-30 57 48 41 35 31 29 28 27 NC-35 60 52 45 40 36 34 33 32 NC-40 64 56 50 45 41 39 38 37 NC-45 67 60 54 49 46 44 43 42 NC-50 71 64 58 54 51 49 48 47 NC-55 74 67 62 58 56 54 53 52 NC-60 77 71 67 63 61 59 58 57 NC-65 80 75 71 68 66 64 63 62 NC-70 83 79 75 72 71 70 69 68 Related Mobile Apps from The Engineering ToolBox NC Noise Criterion Calculator App - free apps for offline use on mobile devices. Recommended Noise Criterion - NC Noise in different types of rooms should not exceed the Noise Criterion limits as listed below: Type of Room - Space Type Recommended NC Level NC Curve Equivalent Sound Level dBA Residences Apartment Houses 25-35 35-45 Assembly Halls 25-30 35-40 Churches, Synagogues, Mosques 30-35 40-45 Courtrooms 30-40 40-50 Factories 40-65 50-75 Private Homes, rural and suburban 20-30 30-38 Private Homes

, urban 25-30 34-42 Hotels/Motels - Individual rooms or suites 25-35 35-45 - Meeting or banquet rooms 25-35 35-45 - Service and Support Areas 40-45 45-50 - Halls, corridors, lobbies 35-40 50-55 Offices - Conference rooms 25-30 35-40 - Private 30-35 40-45 - Open-plan areas 35-40 45-50 - Business machines/computers 40-45 50-55 Hospitals and Clinics - Private rooms 25-30 35-40 - Operating rooms 25-30 35-40 - Wards 30-35 40-45 - Laboratories 35-40 45-50 - Corridors 30-35 40-45 - Public areas 35-40 45-50 Schools - Lecture and classrooms 25-30 35-40 - Open-plan classrooms 35-40 45-50 Movie motion picture theaters 30-35 40-45 Libraries 35-40 40-50 Legitimate theaters 20-25 30-65 Private Residences 25-35 35-45 Restaurants 40-45 50-55 TV Broadcast studies 15-25 25-35 Recording Studios 15-20 25-30 Concert and recital halls 15-20 25-30 Sport Coliseums 45-55 55-65 Sound broadcasting 15-20 25-30 Example - Estimating NC - Noise Criterion The Noise Criterion - NC - of a noise spectrum like 62.5 Hz : 40 dB 125 Hz

: 50 dB 250 Hz : 55 dB 500 Hz : 60 dB 1000 Hz : 50 dB 2000 Hz : 55 dB 4000 Hz : 45 dB 8000 Hz : 45 dB can be estimated to NC = 57 dB as indicated in the NC - Noise Criterion Example You can save and modify your own copy of the example if you are signed into your Google Account. NCB Curves Balanced Noise Criteria (NCB) curves are used to specify acceptable background noise levels in occupied spaces and include air-conditioning an any other ambient noise. They are intended to replace the NC curves. en: noise criterion nces: ruido criterio ncde: Lärmkriterium nc Need some Expert Advice? JustAnswer can help you! Talk with a verified expert until your satisfied, 100% money- back guarantee. Search the Engineering ToolBox Engineering ToolBox - SketchUp Extension - Online 3D modeling! Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free