Custom Climates HVAC

10/06/2026

One thermostat can only read the temperature in one location. Usually a hallway. Meanwhile someone's cold in the bedroom, someone else is too warm in the living room, and the thermostat doesn't know either of those things.

This is the reality of single-zone heating and cooling in most New Hampshire homes. The system treats the entire house as one space with one temperature. Houses aren't one space.

Multi-zone ductless changes the setup. Each indoor unit has its own temperature control. The bedroom runs at 66. The living room runs at 72. The kids' room runs at whatever they want. The system isn't fighting itself.

We've been installing Mitsubishi multi-zone systems across Southern NH for 18 years. The thermostat war ends when each room has its own control.

603-318-3867 or customclimates.com.

08/23/2026

08/23/2026

08/23/2026

08/18/2026

A review from B. Young this past August: "The units are silent and the outside unit is very quiet."

They ran their Mitsubishi ductless system 24/7 for the entire month. No noise complaints.

Most of the homeowners we talk to are replacing window units. If you've ever tried to sleep next to one in July, you know the sound — a rattling compressor that cycles on and off every 20 minutes. A Mitsubishi wall unit runs at about 20-26 decibels on low. A whisper is roughly 25 decibels.

Quiet operation isn't a premium upgrade. It's the difference between running your AC through the night and shutting it off so you can actually sleep. We hear this from customers regularly — the silence is what surprised them most.

603-318-3867 or customclimates.com.

08/11/2026

If your house feels sticky and humid even with the air conditioner running, the problem might be your equipment — not the temperature setting.

An air conditioner removes moisture from the air as part of the cooling cycle. But here's what most homeowners don't know: if the system is oversized for the space, it cools the air too fast and shuts off before it has time to pull the moisture out. The house reaches the target temperature but stays damp. That's the clammy feeling.

This is one of the most common issues we find in Southern NH homes. An oversized AC was installed during a previous renovation or equipment swap. The homeowner has been living with high indoor humidity for years without knowing the cause.

Mitsubishi ductless systems run variable-speed compressor cycles. They adjust output to match the actual load in the room, which means longer run times at lower speeds. More moisture gets removed per hour of operation. The difference in comfort is immediate.

If your AC is running but your house still feels humid, it's worth having someone look at whether the equipment is sized correctly.

603-318-3867 or customclimates.com.

08/06/2026

If you have a dog or cat that sheds, your HVAC system is working harder than your neighbor's. Pet hair and dander accumulate in your air filter significantly faster than in a non-pet home.

A clogged filter does three things: restricts airflow, forces your system to run longer cycles to reach the target temperature, and recirculates dander and particulates back into the air. For pet owners with allergies, this compounds the problem.

The fix is simple. Check your filter monthly during summer and winter peak use. Replace it every 30 to 60 days if you have shedding pets. A standard filter costs around $15. A service call for a frozen coil or a burnt blower motor from restricted airflow costs considerably more.

Your pets breathe the same air your family does. Clean filtration matters more in a pet household.

603-318-3867 or customclimates.com.

07/08/2026

When we say Wesley holds the Elite Diamond Technician certification from Mitsubishi, it's worth explaining what that actually means.

An authorized dealer or Elite Diamond Contractor status is a business-level relationship — the company is recognized by Mitsubishi. That's what Custom Climates holds at the company level.

The Elite Diamond Technician certification is something different. It's a technician-level credential that requires passing technical exams specific to Mitsubishi equipment. It lives with the technician, not the business. Fewer than a handful of NH companies have a tech who holds it.

That distinction shows up in the precision of every Mitsubishi install Wesley touches.

Call 603-318-3867 for a system estimate.

07/07/2026

One of the most common things we hear before a heat pump estimate in Southern New Hampshire: "but won't it fail in January?"

It's a fair concern — older heat pump technology did struggle in cold climates. The current generation of cold-climate units is a fundamentally different product.

Mitsubishi's H2i+ units deliver 100% heating performance at -10°F and continue operating to -22°F. The average January low in Concord is around 12°F. The equipment handles it — that's what it was designed for.

We've been installing Mitsubishi systems in Southern NH for 18 years. The winters here don't surprise these units.

If you've been holding off on a heat pump because of cold weather concerns, it's worth revisiting the current specs with us.

603-318-3867 or customclimates.com.

07/02/2026

Before running your AC for the first time this season, there's one thing worth checking that most homeowners skip: the air filter.

Indoor air can be 2 to 5 times more polluted than outdoor air, according to the American Lung Association. Your HVAC filter is one of the main factors in whether that number goes up or down in your home.

A filter that hasn't been changed since last fall is working against you. It reduces airflow, forces the system to work harder, and recirculates contaminants back through the return rather than capturing them. Most manufacturers recommend replacement every 1 to 3 months during peak use.

The fix takes two minutes. Worth doing before you need the system to work.

603-318-3867 or customclimates.com for a full pre-season inspection.