Air Purification & Indoor Air Quality

UV purifiers, HEPA filtration, and whole-house air cleaning. Breathe better. SE Massachusetts and Rhode Island.

Clean the Air Inside Your Home

Indoor air is often two to five times more polluted than outdoor air. Dust, pet dander, mold spores, VOCs from paint and cleaning products. Your HVAC circulates all of it unless you add filtration. The older housing stock across Fall River, New Bedford, and Rhode Island makes this worse, since decades-old basements and ductwork hold dust and moisture.

We install UV air purifiers in your ductwork that kill bacteria and mold. HEPA systems that trap particles down to 0.3 microns. ERVs that bring in fresh outside air without losing heating or cooling. Right system depends on your home and what you need solved.

Already getting a furnace, mini split, or AC installed? Adding air purification during the same project saves labor since we are already in the system. Ask about bundling during your free assessment.

UV Purification

Kills bacteria and mold in ductwork

HEPA Filtration

Traps particles down to 0.3 microns

ERV Systems

Fresh air without energy loss

Bundle & Save

Add during HVAC install for lower labor cost

⭐⭐⭐⭐⭐ Donna is always so polite and accommodating. The technicians are knowledgeable and professional. We've used Triangle for years and wouldn't call anyone else.

Karen L.

Residential Customer

Get Your Free Assessment

Services Form — Triangle Mechanical (#5)

📞 Call (508) 501-7424

Fastest: call (508) 501-7424. Calls are answered around the clock, and emergencies get the on-call tech dispatched day or night.

Prefer the form? We typically get back to you within one business day.

First Name

Last Name

Phone

Message

I consent to receive messages from Triangle Mechanical Services, Inc. at the phone number and/or email provided (appointment confirmations, service updates, review requests). Message frequency may vary. Message & data rates may apply. Reply HELP for help or STOP to opt out.

I consent to receive marketing and promotional messages from Triangle Mechanical Services, Inc. at the phone number and/or email provided. Message frequency may vary. Message & data rates may apply. Reply HELP for help or STOP to opt out.

Our Installation Process & Brands

Free Assessment

We evaluate the space, measure rooms, and check your electrical panel. No cost, no obligation.

Custom System Design

We spec the right system for your home and put the price in writing before any work starts.

Professional Installation

Our licensed techs handle HVAC, electrical, and any panel upgrades. All in-house. No subcontractors.

System Training & Warranty

We walk you through the controls, register your warranty, and stand behind the work with a one-year labor guarantee.

What Does Air Purification Cost?

UV duct-mounted purifiers run $1,000 to $2,500 installed. That is the fix for mold and bacteria concerns.

HEPA filtration systems cost $2,000 to $5,000. The choice for allergies, dust, and pet dander.

ERV systems run $3,000 to $6,000 and bring in fresh outside air without losing your heating or cooling. Carbon add-ons for odors and VOCs run $300 to $800.

Bundling with a furnace, AC, or mini split install cuts the labor cost since we are already in the system.

Air Quality Quick Reference (2026)

UV duct purifier (installed)$1,000-$2,500

HEPA filtration system$2,000-$5,000

ERV system$3,000-$6,000

Carbon add-on$300-$800

Bundle with HVAC installReduced labor

We test and recommend. Not everything needs the most expensive system.

Why Homeowners Choose Triangle for Air Quality

In-House Electricians

Most HVAC installers sub out the panel work. That means two companies, two schedules, two invoices. Our own electricians handle the panel work. One company, one invoice.

Mass Save Participating Contractor

We know which systems qualify, what documentation the program requires, and where homeowners usually lose money by picking the wrong equipment tier. We confirm your eligibility before you spend a dollar.

55 Years. Not a Startup.

Rebate money brought a lot of new companies into this market. Triangle has been at 425 Pleasant Street in Fall River since 1970. When your compressor needs warranty service in 2030, we will still be here.

Four Trades, One Company

Getting a mini split and notice the water heater looks rough? Want a generator quote while we are there? Heating, cooling, plumbing, electrical, refrigeration. One call, one truck, one bill.

What Our Customers Say

⭐⭐⭐⭐⭐They diagnosed a heating problem we had for over 20 years that no one else could figure out — including one of the guys from This Old House. They didn't give up until they solved it. The owner Tom is wonderful and Neil is a real gem!

⭐⭐⭐⭐⭐Donna is always so polite and accommodating. The technicians are knowledgeable and professional. We've used Triangle for years and wouldn't call anyone else.

⭐⭐⭐⭐⭐ AJ, Chad, and Tony did an amazing job on our church's HVAC system. Professional, clean, and on time. Triangle treats every job like it matters.

⭐⭐⭐⭐⭐ Called on a Sunday night with no heat. They had someone at our house within an hour. Fixed it on the spot. Can't ask for more than that.

⭐⭐⭐⭐⭐ We use Triangle for all our rental properties. One call for heating, plumbing, electrical — they handle everything. Makes my life so much easier.

What is the best whole-house air purifier?

Depends on the problem. UV for mold and bacteria. HEPA for particles. Carbon for VOCs and odors. We assess and recommend the right fit.

Can I add air purification to my existing HVAC?

Yes. Most systems retrofit directly into existing ductwork. No new major equipment needed beyond the purification unit.

How much does a whole-house air purifier cost?

UV: $1,000 to $2,500. HEPA: $2,000 to $5,000. ERV: $3,000 to $6,000. Bundled labor savings available. Call (508) 501-7424.

Do air purifiers help with allergies?

Yes. HEPA filtration pulls pollen, dust, and pet dander out of the air your HVAC circulates. Spring pollen hits hard across Fall River, Dartmouth, and Providence, and a whole-house system beats portable units because it treats every room. Most allergy customers notice the difference within days.

Can you fix musty smells and mold in the air?

UV purification is built for this. A lamp mounted in your ductwork kills mold spores and bacteria as air passes through. Musty odors in older homes around New Bedford and Warren usually trace to moisture in the system, so we check the ducts too, not just the air.

How often do filters and UV lamps need replacing?

HEPA filters last 1 to 3 years depending on use. UV lamps are annual, and carbon filters run 6 to 12 months. We set the schedule at install and can service everything during your regular HVAC maintenance visit. Call (508) 501-7424 to set it up.

Ready to Get Started?

Whether you need an emergency repair, a new installation, or a second opinion, Triangle is here to help. One call handles it all.