HVAC Terminology Guide for Homeowners in Birmingham AL

Programmable Thermostat

A programmable thermostat is a device that allows you to automatically control your heating and cooling systems based on a schedule that you set. It enables you to set specific temperatures for different times of the day and night, helping to improve energy efficiency and comfort. For example, you can program it to keep your...

PSC

PSC stands for "Permanent Split Capacitor," which is a type of motor commonly used in HVAC systems for fans and pumps. These motors run on AC voltage and operate at a fixed speed, sometimes offering two or three preset speed options. However, they are generally less energy-efficient compared to newer motor technologies, as they lack...

PSI

PSI refers to "Pounds Per Square Inch," which is a unit of pressure measurement. It describes the amount of force applied over one square inch of area. In HVAC systems, PSI is commonly used to measure the pressure of refrigerants in different parts of the system, as well as the pressure in compressed air systems...

PSIA

PSIA stands for pounds per square inch absolute. It is a unit of pressure measurement that includes atmospheric pressure in its calculation. Unlike PSIG (pounds per square inch gauge), which measures pressure relative to atmospheric pressure, PSIA measures the total pressure, including the atmospheric pressure at sea level (14.7 psi at standard atmospheric conditions). For...

PSIG

PSIG stands for "pounds per square inch gauge," which is a measurement of pressure. It represents the pressure of a system relative to atmospheric pressure. In HVAC systems, PSIG is often used to measure the pressure inside refrigerant lines or tanks. If the pressure reading is zero PSIG, it means the pressure inside the system...

Pulse With Modulation

Pulse Width Modulation (PWM): A technology used to control the speed of motors, such as those in HVAC systems, by rapidly switching the power on and off. In HVAC systems, PWM is often associated with ECM (Electronically Commutated Motors). This method allows for precise control of fan speeds, enabling the system to adjust airflow as...

Purge Unit

A purge unit is a device used in chiller systems to remove non-condensable gases, such as air or other impurities, that can accumulate within the refrigeration system. These gases can impair system efficiency by reducing heat transfer and increasing pressure. The purge unit captures and expels these unwanted gases from the system, ensuring the chiller...

PVC

PVC, or polyvinyl chloride, is a durable and versatile plastic commonly used in HVAC systems for various purposes, such as drain lines, vent pipes, and ductwork. It is lightweight, resistant to corrosion, and cost-effective, making it a practical choice for safely transporting air, water, or condensate without degrading over time.

PWM

PWM (Pulse Width Modulation) is a technique used in HVAC systems to control the speed of devices like fans or compressors by adjusting the power supplied to them. Instead of running at full power all the time, the motor receives a series of rapid on/off pulses, with the duration of the "on" time determining the...

R-22 Refrigerant

R-22 Refrigerant: A chemical compound (also known as Freon) that was commonly used as the refrigerant in residential and commercial air conditioning systems for several decades. However, due to its harmful effects on the ozone layer, its production and use have been gradually phased out under the Montreal Protocol and U.S. EPA regulations. Systems using...

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James Coco

Jonathan to the rescue! A quick response saved us from a miserable night. Jonathan had us fixed in a matter of minutes! Highly recommend!

Pam Bennett

I can not say enough amazing things about my experience with Paradise - most importantly, about JONATHAN PERKINSON! He is super knowledgeable about any and all HVAC systems, and he answered all my questions - he actually went above and beyond my expectations. I am excited about this company bc I have tried SEVERAL in the Birmingham area - and I’m telling you - this is the company to use and Jonathan is the one specifically that I will be calling again and again!

B. Keith Putt

Excellent company! Jonathan and Matt were professional, friendly, and extremely efficient. They had my HVAC system replaced in 4 hours! If my other unit ever bites the dust, they will be the ones I call for a new one!! I highly recommend them.

David Brainerd

Jonathan did a great job. Highly recommended.

Audray Jones

First of all they are very courteous people. Secondly they gave me an appointment asap and was there right on time in which I was able to keep track of the arrival by text messages. They diagnosed the problem and it was resolved in less than 30mins. I am truly grateful for Paradise Heating and Air. Thank you for your service. Side note: they chose the best name for the company. I was in Paradise after the repair lol

Dana Gaudet

I recently had this company come out to my home because my unit wasn’t working, they had someone out the same day. Jonathan was extremely professional and knowledgeable, definitely recommend this company!!

glophers hicks

Jonathan was very professional and knowledgeable, with a great personality. I will be doing business in the future with his company. I immediately signed up with the company’s annual service plan.

Ashley Ponter

We were very pleased with the service we received! The men were knowledgeable, honest, and timely. We would HIGHLY recommend this service!

Brian Motley

My unit for upstairs had a major leak in the evaporation coils. Jonathan and Matthew came over and spent an hour here investigating and giving me my options. I decided to replace the whole unit and they were here on a Saturday replacing the unit. The knowledge that Jonathan possessed was second to none. The experience was excellent I will be using them again and I highly recommend them.

akash ahmed

Good service.

Danna Jones

Great service - always on time and very professional.

Cynthia Belyeu

We have had Jonathan and his capable team working on our A/c and Heating for several years. They are punctual, well mannered and reasonably priced. The work they have done including an A/C replacement has always been outstanding. Plus, we have appreciated their problem solving skills in helping our remaining old units get along from year to year. We are so grateful to have them a phone call away!

Joshua Woodall

Jonathan provided excellent service and was extremely knowledgeable. He had our heat up and going in no time and also helped us with setting up functions on our thermostat while he was here!

Katherine Marshall

Extremely nice, on time, helpful and explanatory. Very professional. Thank you

Sandy Hicks

Being a first time customer I was extremely impressed with how punctual and professional the technicians are. I highly recommend Paradise Heating and Air

Marianne Herman

Exactly what I needed!

Steve

Always polite. They were at my house at 8:30 pm making sure we had cool air.

VWC

Amazing service and very helpful as well as willing to inform me of what was going on.

samuel wilson

Tech was on time, very professional, courteous, knowledgeable addressed my concerns about the system. Will definitely be recommending Paradise Heating and Air.

Chris Holland

Jonathan and the whole Paradise staff are professional, courteous, and fast. I had a system failure, and they were able to get to me quickly and diagnose the problem. Through Jonathan's research he discovered my system had a warrantied part needing replacement and saved me $1600. I would HIGHLY recommend Jonathan and the Paradise crew and will be using again!

Mary Cavett

Jonathan was great - AC suddenly went out and he was able to get over in 30 min and get it working again! Very knowledgeable and nice!

Cheryl Kruse

I highly recommend Paradise Heating and Air. I contacted them to give me an estimate on adding more insulation to my attic. They were super responsive. They came out, gave me an estimate that I felt was very reasonable. In a very short time I was on their schedule. They showed up at the time they told me they would and they did a great job!! They even took care of the areas that were leaking heat. They are very personable, great to deal with. I am super pleased.

Erica Harris

Highly recommend Jonathan and Matthew. They were able to come same day when my air stopped blowing cool air none other than the first week of consistent upper 80s weather. They were on time and from the brief description I shared over the phone they knew right where to start. They had the part that needed to be replaced and I had cool air flowing in less than an hour! Thanks guys will use you again.

Tom Marvin

Jonathan and his crew are always quick to respond and on time. They always help me to understand what is going on with our AC and heating units. I get a concise explanation of what needs to be done. I have always gotten an honest answer about my current units and I have never gotten any pressure to replace the equipment that did not need replacing. It feels great to be able to trust the information you get from the people looking after your HVAC equipment, and that is what we get from Paradise. T. Marvin

Charles Reynolds

Jonathon, as always, provided great service! He is very efficient and honest. Thanks Jonathon, Charles

Robert Dasenbrock

M Sewall

Paradise was very responsive and was able to come same day. Very professional, nice and honest - would recommend to anyone!

lee lee

2025 UPDATE: I needed Jonathan service on Friday, April 3rd. I called his office at 6:40. Jonathan arrived at my home by 2 o’clock that afternoon. Got my unit back up and running in less than an hour. The team at Paradise heating and cooling. Always provide exceptional, customer service and expertise. As long as Jonathan is in business, I will continue to do business with him. "I was so impressed with Mr. Jonathan from Paradise Heating & Air! They were incredibly respectful of my home, even wearing shoe covers. They were punctual and kept me informed every step of the way. Mr. Jonathan took the time to explain the issue clearly and simply, without any confusing technical terms. They offered several options and let me decide what was best for me and my budget. I really appreciated that they didn't try to oversell me on something I didn't need. It's clear that Mr. Jonathan is knowledgeable and truly cares about their customers. I highly recommend Mr. Jonathan and Paradise Heating & Air to anyone looking for reliable and honest HVAC service. It's refreshing to find a company you can trust."

Kofi Creme

My unit was not working and they were working with my relatives. I asked if they would take a look at mine and they did with no problem. They told me what the problem was an within 2 days they had my unit up and running!

Mark Hamblen

Did a very thorough job of servicing my system. Will use again.

Blake Driskill

Excellent experience!

A.K. Powell

Scheduling was super easy and they were able to work me in quickly. Jonathan was so nice and explained things to me in a way I understood. They were also very quick but thorough

Steve S

I had paradise come out to get me started with their paradise maintenance package, and had them take a look at my attic because we had concerns with our insulation not being adequate. They didn’t try to over sell work I didn’t need, and were honest with what exactly was needed to get us back on track. Techs Jonathan and Matthew came out for the initial inspection and service and came back to do the attic insulation. They were patient and knowledgeable (I ask a lot of questions) and took their time. They found all the places that my system was leaking (out and in) air, fixed them, and then filled the attic. They kept the house clean and were respectful and had great attitudes the entire time. They have definitely earned my business, and I would recommend them to anyone looking for HVAC work. They are AWESOME!

Linda Thompson

Jonathan and his helper were awesome. Keeping us informed as to what they were doing as they replaced our heating and air units. They were pleasant to have around and did a great job. They not only left the areas clean they hauled off all the old equipment. We would highly recommended them to everyone.

Andrea Martin

5 stars! Look nowhere else for all of heating and cooling needs. Jonathan is amazing - experienced, reasonable and reliable. Look nowhere else!

Sandy Farris

Paradise ALWAYS delivers high quality service! I love the honesty and integrity of this company. Paradise is without a doubt my first choice for all my heating and air needs!

Peter Wald

Routine service plus setting changes plus education plus rec's for the future. Spent much more time than normal to satisfy my real needs.

John Wills

Great company to work with AGAIN! The minor issues found were carefully explained and resolved. We setup a biannual service plan to keep this 20 yr old house in tip top shape. This is the company you need to handle your HVAC needs.

Gayle Wroclawski

We've been doing a complete renovation of our family home of 30 years to sell and retire. We also needed to make sure we had adequate insulation and have the ductwork inspected. I called Paradise Heating and Air, and found that this was a service they could provide. They were very responsive. I had an estimate within a few days and the job completed the following week. They fixed anything that could become a problem and blew in the amount of insulation to meet the current Hoover building code. Jonathan was so friendly, explained everything that was done and the cost was very reasonable. In fact he talked me out of insulating an area that wasn't really needed!!! I couldn't be happier with the service, and feel good that everything is secure and to code. I highly recommend Jonathan and Paradise Heating and Air!!

Carole Grimes

Called Paradise on a Sunday(Father's Day) and got a call back and service/ repair the same day. They explained what was needed and did the necessary repairs. I have a nice cool home again.

Laurie Dunn

Always knowledgeable, respectful, and right on time!

John Wright

The only company I'll use for HVAC. Jon and his team explain everything, do meticulous work, and clean up after the job is done. What more could you ask for? Thanks guys!

Polly Norris

I honestly cannot tell you just how highly I recommend these folks. Five stars are not enough! They are friendly, professional, very competitively priced and a real pleasure to work with. I've had them out twice, once for a split unit in my sunroom and then today for my main unit and both times they did an exceptional job.

Printella Thomas

Wonder job Persistent and thorough in evaluating the problem and correcting the problem

Nancy Hollaway

Our AC was struggling a bit. Had another HVCA company come check it out first. Their recommendation was a whole new replacement unit. Bare minimum a $6000 repair job. Got a second opinion from Jonathan’s company, Paradise. All the unit needed was refrigerant. Saved us thousands !! We would recommend Paradise every day of the week and twice on Sunday.

Jon Hinds

On time, explained everything very well. Came up with come options to repair my system rather than replace. Thank you.

Wilson Moores

I have been extremely pleased with the work performed and customer service.

Melanie Authement

Honest and kind. Gave incredible price for work completed. Called and was able to come earlier than expected! Cannot recommend enough

Chase H

Quick service, fair price, and very thorough with explaining different options. Jonathan was straight and to the point without any sort of pushy sales talk which is rare in the HVAC industry today. Highly recommend!

SteelCityScreenPrint

Paradise answered my call late at night and made me an appointment for first thing in the morning and even showed up early. They crawled under my rental house through the dirt and mud to inform me that my landlord had me living in a dangerous environment. He was upfront and honest about everything and let me know the steps I needed to do to get my family out of this situation. No bandaid fixes from these guys, they do things in a professional manner and I couldn’t be more appreciative. Top notch customer service. Highly recommend!

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