Your Systems.Inspected.Every Year.
A trained technician goes through every accessible component, documents what they find, and tells you exactly what your system needs — before it breaks down at the worst possible time.
$99
per system / per year
16 Points
documented inspection
10%
off service & repairs
$300
referral gift card
Priority service queue
members go to the front
Weekend diagnostic $99
half the standard $199 rate
Warranty documentation included
keeps manufacturer coverage intact
40+ towns
Greater Boston & MetroWest since 2012
Why It Matters
What happens either way.
Home systems don't fail randomly. Most failures are the last step in a chain of events that started months — sometimes years — earlier. The difference between catching it and missing it comes down to whether someone looked.
You find out when it stops working.
Small problems compound quietly. A worn capacitor, a slow refrigerant leak, a cracked heat exchanger — none of these announce themselves. They just get worse.
Manufacturer warranties require documented annual maintenance. Without it, a parts claim can be denied — even on equipment that's still under warranty.
A weekend breakdown costs $199 for a technician to show up — before a single repair is made. Members pay $99 for the same call.
You explain your system from scratch every time you call. No history, no relationship, no one who already knows your home.
You know what's going on before it's a problem.
A technician goes through your system every year — 16 documented points, written report, findings explained. Problems get caught when they're still small.
Your inspection generates the maintenance documentation manufacturers require. Your warranty stays intact.
Priority service — you go to the front of the queue. And when you call on a Saturday, you pay $99, not $199. One call covers the year.
We know your systems, your home, your history. You're not explaining everything from scratch every time — you have your HVAC people.
What $99 Actually Delivers
This is what we find.This is what we fix.
A system that hasn't been serviced in two years doesn't look broken — it just looks normal. The dirt on the coil, the filter clogged solid, the drain line collecting debris. You don't see it. Your system does. The inspection is how we see it before you feel it.
Outdoor Condenser Coil
A clogged coil makes your compressor work overtime.
Dirt restricts airflow across the coil. The compressor runs hotter and harder to compensate. The inspection flags it. A tune-up cleans it. Your system stops working overtime and your energy bill stops climbing.
Mini-Split Air Filter
A blocked filter strains the blower and cuts airflow.
A clogged filter forces the blower motor to strain against restricted airflow. Left unchecked it accelerates wear on the indoor unit. A technician vacuums it clean in minutes. That's what the annual inspection catches.
Heat Pump Coil Cleaning
A dirty coil costs you on both heating and cooling.
Heat pumps transfer heat through the refrigerant coil. When that coil is coated in dirt and debris, it can't exchange heat efficiently — the system runs longer cycles, uses more energy, and wears out faster. A coil cleaning restores transfer efficiency and protects the compressor.
Wall Mounted Mini-Split Hygiene
Mold and bacteria build up inside every indoor unit.
The evaporator housing on a wall-mounted mini-split stays cool and damp — the exact conditions mold and bacteria need to grow. You breathe what comes out. A proper hygiene treatment cleans the coil, housing, and drain pan. Your air quality improves immediately.
Wall Mounted Coil Cleaning
A coated indoor coil quietly reduces every room's comfort.
Dust and debris coat the evaporator coil on the indoor unit over time. Airflow drops. The system compensates by running longer. A thorough coil cleaning restores airflow, reduces strain on the blower, and brings efficiency back to where it should be.
Wall Mounted Ventilation System Cleaning
Blocked vents push contaminated air through your home.
Ventilation systems collect dust, pollen, and debris that circulate back through every room. A full cleaning removes the buildup from grilles, ducts, and housings. The result is cleaner air, better airflow, and a system that doesn't have to fight itself to do its job.
$99 gets a trained technician in your home. That's the whole product.
No pressure. They inspect, document, and tell you what they found. You decide what happens next.
What systems are covered
Every major systemin your home.
One $99 membership covers one system for the year. Most homes have more than one — each system gets its own inspection, its own written report, its own documented condition history.
Heat pumps & central air conditioning
Ductless mini-splits
Gas furnaces
Oil heating systems
Tankless & heat pump water heaters
ERVs & whole-home humidifiers
The maintenance umbrella
Three types of work.You always start with the inspection.
Every engagement starts with an inspection that tells us what your system actually needs. From there, we recommend nothing, a tune-up, or in some cases a rejuvenation. You decide. You approve. Nothing happens without your sign-off.
Inspection
A trained technician evaluates every accessible component — 16 documented points per system type. Nothing is touched, cleaned, or replaced. The goal is an accurate picture of your system's condition, in a written report.
7 system types covered. Ends with a written report and a clear walkthrough of findings.
INCLUDED IN YOUR $99 MEMBERSHIP
Tune-Up
Physical upkeep of components that need attention. If the inspection shows dirty coils, a worn belt, clogged drain lines, or loose wiring — a tune-up addresses it. Only what the system actually needs.
Examples: clean blower motor, wash evaporator coil, clean heat exchanger and burner, clean condensate drain, rewire loose connections, calibrate thermostat.
PRICED SEPARATELY
15% OFF AT MEMBER RATES
Rejuvenation
The system is still running. Nothing is obviously wrong. But some components have a known lifespan — and when they fail, they take other parts with them. Rejuvenation replaces aging components before the emergency arrives.
When inspection identifies components approaching end of service life, we explain which parts, why they matter, and what it costs to address them now — not reactively during a breakdown.
PRICED SEPARATELY
15% OFF AT MEMBER RATES
Membership pricing
$99 per system, per year.Every benefit. No contract.
Renews automatically each year via credit card. Cancel any time — benefits end at cancellation. Membership is transferable within SumZero's service area.
Annual Membership
per system · per year
No long-term contract. Cancel any time. Benefits stop at cancellation — nothing billed after.
Annual 16-point system inspection
Valued at $149 for non-members — included in membership
Priority service queue
Front of the line when you need us
Service & maintenance
All labor — repairs, tune-ups, any service visit
New equipment installation
Heat pumps, mini-splits, water heaters, and more
Electrical services
Panel upgrades, EV chargers, outlets & switches
Plumbing services
Boilers, water heaters, drain cleaning, and more
Weekend diagnostic charge
$199 standard → $99 for members. One Saturday call covers a full year.
Referral gift card
When a friend or neighbor installs with SumZero
What's not included: Tune-ups, cleaning, refrigerant adjustments, and part replacements are not automatic. Any work beyond the inspection is recommended only if needed, explained first, and requires your approval — priced separately at member rates.
The 16-point inspection
What your technicianactually checks.
Select your system type. Every inspection ends with a written report, documented findings, and a clear explanation of any recommendations.
Visual inspection of indoor and outdoor unit condition
Thermostat operation and staging verification
Air filter inspection (vacuum existing or replace customer-supplied)
Condensate drain line inspection for leaks or blockage indicators
Evaporator coil visual inspection (accessible areas only)
Blower wheel and housing visual inspection
Blower motor condition evaluation
Line set insulation condition inspection
Outdoor condenser coil visual condition assessment
Condenser fan motor inspection
Refrigerant system performance diagnostics (superheat/subcool data)
Voltage and amperage measurement of major components
Capacitor and contactor operational testing
Inspection of safety controls, pressure switches, and sensors
Airflow and system performance evaluation
Written report with findings, photos where applicable, and recommendations
Eight system types covered. Gas furnace, gas boiler, central AC & heat pump, ductless mini-split, ERV, humidifier, tankless & heat pump water heater, oil heating systems. Additional inspection visits available at $99/system.
Also from SumZero
Want coverage ifsomething breaks anyway?
SumZero PROTECT is a separate extended labor warranty — 5 or 10 years of covered labor on eligible equipment failures. Comfort Club keeps your systems inspected. PROTECT is a financial backstop if something fails regardless. Two different products, two different purposes.
Common Questions
What people ask before joining
Ready to join?
$99 a year.Your HVAC people.
We’ll confirm your address, note which systems you want enrolled, and get you set up. We schedule your first inspection before the season starts — you don’t have to chase it.
No long-term contract · Cancel any time