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Typical your area range for this kind of work, from regional averages — not a quote from On Demand Plumbing & Heating. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
On Demand Plumbing & Heating handles boilers, water heaters, furnaces and plumbing calls. A 2024 customer, who had already received 3 boiler estimates they called outrageous from two other companies, said Dave came over to assess the situation the same night they called without charging for an emergency call. That 2024 customer said Dave followed up two days later, arrived two days after the decision with everything needed for the job, and walked them through the entire process. In that 2024 account, his son Alex came over at 7:00 at night four days later to assess a different issue. A 2024 customer said David and Alex replaced a 22 year old boiler and described a no-pressure sales approach. A 2025 customer said Dave had come to the house four times over seven years for toilet, water heater and furnace needs, and that a water heater replacement cost significantly less than the customer had estimated. A 2022 customer reported a fast response even on a Sunday. A 2024 customer said they prepaid over 10k for plumbing work and a filter at their business, the filter was never put in, a line was left sticking out of the wall, and he stopped answering once paid. A 2023 customer said the company did not install what was agreed upon and damaged the fixtures installed. On Google it holds 3.4 stars from 15 ratings, and its Better Business Bureau grade is A+. A New Hampshire HVAC licence, number GFE0802315, held by Daniel R Lavigne, is active on the state registry.
Dave has come to my house four times over the course of seven years for various toilet, water heater, and furnace needs. He is incredibly communicative, efficient, and transparent. He replaced my water heater and the cost was significantly less than I estimated when researching what to expect. The two separate furnace visits ended up being problems due to my lack of knowledge and not actual mechanical issues. He was courteous and thoughtful in his explanations to help me understand what was happening and how I can prevent them in the future. I highly recommend working with them for plumbing and heating needs.
David and Alex did a great job replacing our 22 year old boiler. He is a local straight talking and dealing plumber. No pressure sales approach and very responsive. We felt very pleased with doing business with an independent and local professional.
I’m so grateful that Dave and Alex were recommended to me for my plumbing issues. I had already been given 3 estimates for a new boiler that were outrageous from two different companies. After having Dave come over to assess the situation the same night I called without being charged for an emergency call was amazing! He didn’t try to over sell me or over price the job. He asked me what I wanted and told me what my options were. After allowing me to think about what I wanted to do, he followed up with me two days later. There was no pressure from him to do the job immediately however when I had made my decision he was at my house 2 days later with everything he needed to get the job done. He walked me through the entire process explaining to me what and why he did what he did. After the job was done he again followed up with a text and phone call to see how everything was going. Four days later I had a different issue only at 7:00 at night his son Alex came over to assess the new issue. He communicated what he thought the next step would be and made it happen within 2 days. I could not be more impressed or satisfied with both outcomes. I was told that no matter the time or day, if I ever had any problems to call him and he would be over. He didn’t charge me for coming over to look at the issue nor did I have to sign up for a membership to avoid emergency charges. You can tell that they really care about their clients and want to do a great job for them. As a single woman owning a house, it can be overwhelming, Dave and Alex made me feel 100% supported and did not take advantage of my lack of knowledge in this department. I will 100% refer to them for any plumbing needs to any of my friends and family. Thank you both for your hard work and dedication to your work.
We paid over 10k for plumbing work and a filter to be put in in our business and it was never put in which was paid for and he left a line sticking out of the wall and never fixed it. We pre paid him out of good faith getting the work done and as soon as we paid him he stopped answering and didn’t finish the work.
Did not install what was agreed upon and damaged the fixtures installed. Luckily I held back money !!! DO NOT HIRE
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1 change recorded — last scanned Oct 18, 2026.
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