Service Area

HVAC Company in Hollis, NH

We're equipped to service older homes that are common in Hollis, including propane and oil heating systems and oil-to-heat-pump conversions.

  • A+ BBB rating since 2003
  • 24/7 emergency service
  • Over 35 years in business
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Why Brookside

Why Choose Brookside Heating & Cooling?

No company has been in business for over 35 years without doing something right. At Brookside, we've built a reputation for dependable products and straightforward service.

A+ BBB rating

We've been accredited by the Better Business Bureau since 2003 and are proud to have received recognition for providing exceptional service.

Experienced technicians

Many of our technicians have worked with us for more than 6 years, ready to diagnose issues quickly and fix them correctly.

Fast response times

We never leave our customers waiting for help to arrive.

24-hour availability

Day or night, 24/7 emergency HVAC service is always just a phone call away.

Special offers

Our promotions keep you comfortable without stretching your budget.

New-build expertise

We expertly handle HVAC installations for new construction projects.

Maintenance memberships

Our Premier Comfort Maintenance Plan keeps your system running efficiently and reduces the risk of unexpected breakdowns.

Reviews

See what your neighbors are saying

4.9from 252 reviews onGoogle

“Came on time, eval was very thorough, was communicative, pleasant, polite, explained all the options, seemed well educated in the mechanics, left after diagnosis and came back same day to make repairs.”

Robby Rix

October 2026

“The technician came right out. He was very polite, knowledgeable, and was able to fix the problem quickly.”

Gina Johnson

October 2026

“I’ve always loved the Customer Service at Brookside Mechanical, and today was no exception. Jon did a fantastic job checking my furnace for annual maintenance and he explained everything so I would have no questions.”

Susan Lazos

October 2026

“Great customer service. Techs are on time, knowledgeable and very friendly to work with.”

Anne Leduc

September 2026

“I’ve been a long time customer of Brookside Mechanical for a long time. Johnny Mac did a great job diagnosing our thermostat issues and installing updated equipment in our home. Another fantastic job by Brookside Mechanical!”
Read the full review

Allison Twite

September 2026

Review 1 of 5

Questions

Frequently Asked Questions

What should I do if I need emergency HVAC repair in Hollis?

Call Brookside and request 24/7 emergency HVAC services. Our prompt response time prevents further damage and restores comfort faster.

What causes HVAC systems to break down?

System failures often stem from a lack of maintenance. Brookside recommends routine tune-ups because they improve system performance and reduce the wear and tear that leads to breakdowns.

Is an oil-to-heat-pump conversion a good option for homes in Hollis?

Many Hollis homeowners are switching from oil heat to high-efficiency heat pumps to reduce energy costs and improve year-round comfort. Modern cold-climate heat pumps are designed to operate efficiently in New Hampshire winters while providing air conditioning in summer, making them a versatile alternative to traditional oil heating systems, and Brookside can help you decide if one is right for your home.

How often should I service my boiler in Hollis, NH?

Oil and propane boilers should be professionally serviced at least once a year, preferably before the heating season begins. Brookside's regular boiler maintenance helps improve efficiency, extend equipment life, reduce fuel consumption, and prevent unexpected breakdowns during cold Hollis winters.

Are ductless mini-splits effective for older homes in Hollis?

Yes. Brookside finds ductless mini-splits are an excellent HVAC solution for many older Hollis homes without existing ductwork. They provide efficient heating and cooling for individual rooms, additions, finished basements, and older homes while allowing homeowners to customize temperatures throughout the house.

When should I replace my furnace rather than repair it?

If your furnace is more than 15 years old, requires frequent repairs, struggles to heat your home evenly, or is driving up energy costs, replacement may be the more cost-effective option. A Brookside HVAC technician can help determine whether repair or replacement is the best investment for your Hollis home.

Which is better for a Hollis home: a heat pump or a propane boiler?

Both heat pumps and propane boilers can provide reliable comfort for Hollis homeowners, but they serve different needs. Heat pumps offer highly efficient heating and cooling in a single system, making them an attractive option for year-round comfort and lower energy consumption, while propane boilers provide consistent radiant or hydronic heat that many homeowners prefer during New Hampshire's coldest winter months. Brookside can help determine which option is the better fit for your home based on your existing system, energy goals, budget, and comfort preferences.

Still not sure? Call (603) 691-2106.