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Sine Wave Electric & HVAC does household electrical work, from basement outlets to whole-house mini splits, and holds a 5-star average from 10 Google ratings. Its New Hampshire electrician license, number 0504C, is active on the state registry; the holder of record is Sine Wave Services, LLC, doing business as Mr. Electric of Southeast NH. A 2026 customer said Steve put in recessed lighting and was meticulous from planning to install. A customer in a 1940s house said Steve came to diagnose an outside light, uncovered more issues, and walked them through getting everything fixed, with no issues in the year since. A customer with a new garage said Steve helped plan its lighting and power, including a future option for solar panels, and coordinated with other contractors throughout the building process. HVAC is part of the mix too. One household had a whole-house mini split system installed as the latest of numerous jobs in its home and said Steve was transparent with pricing. A customer said Sine Wave added electrical outlets in a basement and a 220v heater in a garage. A customer with apartment units said Steve has done electrical work for them for years, and a Pembroke customer said Steven did a small electric job on their home.
Steve has done a lot of work for us and is always very responsive and proactive to ensure he gets us on the schedule. Earlier this year he put in some recessed lighting for us and was very meticulous from planning to install - it came out great! I’d highly recommend Sine Wave for any electrical needs.
I've had Sine Wave over to do various projects around the house. They added electrical outlets in my basement, a 220v heater in my garage and other similar residential work. Always on time and high quality at a fair price. They are my go to for electrical work.
Steve has been doing electrical work for me and my apartment units for years. He has always been professional, knowledgeable, timely and honest. His prices are competitive with the market and he always puts safety first when it comes to doing work in my home. If you need electrical or HVAC work done, don't call Paradigm, don't call Heritage; Call Sine Wave Steve!
Steve was great! Called and answered right away. Showed up on time and completed everything I needed. Would not use anyone else for electrical or HVAC needs.
Sine Wave Electric & HVAC has done numerous jobs in our home with the most recent being an installation of a whole house mini split system. Each time Steve was punctual, courteous, meticulous, and transparent with pricing. We definitely recommend Steve and his crew. We will continue calling him for all of our electric and HVAC needs!
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1 change recorded — last scanned Oct 18, 2026.
Typical your area range for this kind of work, from regional averages — not a quote from Sine Wave Electric & HVAC. Use it to sanity-check bids, then get the real number in writing.
Standard receptacle swaps — a new dedicated circuit is a bigger job ($350–$750).
Flush mounts, pendants, chandeliers — hung on existing boxes.
Estimated range
$530 – $1,100
Typical electrical project around $820
Smoking plug fixed within a couple of hours5.0
200-amp service upgrades4.3
46 years in businessNot yet rated
