Gas Furnaces We Install: Carrier and Bryant

RESIDENTIAL FURNACES

For most comfortable and reliable heating we offer a full line of gas furnaces including Carrier and Bryant, shown here. We are standing by ready to help you select the best system.

Shemtov Systems – Furnace Repairs and Solutions

Gas furnace, propane furnace: We offer Heating services in Silver Spring, Furnace repair, service and furnace replacement. We do our best to offer same day service, call us for any malfunctions in your heating system, we will respond to you immediately, get there as soon as we can and repair your system as soon as possible.

Furnace repair: If your furnace is not coming on, or it’s not working properly, call our technician for quick diagnostic and affordable Furnace repair. It should not be difficult to heat up your home and keep it warm and comfortable during the cold season. Home owners often face common simple problems with furnaces not functioning properly, whether it’s a simple cleaning or faulty ignitor, we will diagnose it fast, give you a price and repair the furnace for you.

Furnace replacement can get pricy and confusing. We offer a FREE estimate for unit replacements if needed, we will go over your home and system with you and offer you the best suitable, advanced products that meets your needs and budget designed to keep your home comfortable while saving you money, if you need a free estimate or any Heating repair services in Silver Spring don’t hesitate call us to experience the difference!

You will find that Shemtov Systems is one of the best in the area. We have been in the business of replacing and maintaining HVAC systems for over three decades. We do it right, we do it by the code, and we get it inspected. Schedule a diagnostic or a Furnace replacement with our company, we will send one of our expert technicians for a diagnosis or a FREE Estimate at the earliest possible time that is convenient to you. We will give you advice even if you decide to use another company. Will provide you with a diagnosis and an estimate to repair your faulty equipment before we repair it or a free estimate replace it with the best possible system that can best service your particular house.

We recommend that home owners keep their Heating, Furnace Serviced and in good working order and their air-conditioning system regularly maintained. A poorly maintained heating or air conditioning system can get expensive, Shemtov Systems provides premium quality service that looks at the entire system, it is geared towards getting the maximum efficiency and optimum operation out of your system while providing the best indoor air quality your unit can provide!

Furnaces

Shemtov Systems offers full line of energy efficient gas and propane furnaces. Call our knowledgeable technicians today to help select the best furnace for you. We will give you advice on everything needed for a safe and correct replacement

EVOLUTION® VARIABLE-SPEED GAS FURNACES

Evolution® Series Gas Furnaces provide quiet, smooth, whole-home comfort. You’ll hardly hear it running as you get cozy with up to 98.3% AFUE savings. Features including variable speed airflow or Perfect Heat® technology can keep you comfortable year round.

GAS POWERED HOME HEATING

Gas is a highly efficient fuel, so you get a good return on every unit of energy. Modern condensing boilers, which use hot flue gases that are wasted in a standard boiler, have very high efficiency. Some are now 90% or more efficient.

We Service

The following areas for HVAC, Heating & Air Conditioning Services for both Commercial & Residential

A furnace is chosen on four specifications: the fuel it burns, its AFUE rating, how finely it can vary its firing rate, and the blower motor behind it. Venting category then decides what will physically fit. To compare furnace models in Silver Spring and the rest of Montgomery County, call Shemtov Systems at 240-355-3333.

Key takeaways

AFUE is the share of fuel energy a furnace turns into delivered heat across a heating season.
The federal minimum is 80.0 percent AFUE, rising to 95.0 percent for gas furnaces manufactured on or after December 18, 2028.
Ninety percent AFUE is the line where a furnace becomes condensing and the venting rules change.
Blower motor type is a separate choice from the burner, driving electricity use and airflow stability.
Model numbers advertise input Btu; compare candidates on output instead.

Gas, propane, or electric: which fuel fits the house?

Natural gas mains reach most of Silver Spring, Wheaton, Bethesda, and Rockville, so a gas furnace is the default there. Where they do not, around Olney and the outer county, propane furnaces are the same cabinet with the manufacturer's LP conversion kit: different burner orifices and manifold pressure, listed for that model. Electric furnaces use resistance elements, cheap to buy and costly to run at Maryland rates, so a heat pump is the better all-electric answer.

What does an AFUE rating actually tell you?

It is a seasonal ratio: heat delivered into the house divided by the energy content of the fuel burned, cycling losses included. An 80 percent furnace sends about a fifth of that energy out the flue; a 96 percent unit recovers most of it by condensing water vapor from the exhaust. AFUE excludes the electricity the blower draws, which is why the motor is judged separately.

Single-stage, two-stage, or modulating: what is the difference?

A single-stage furnace fires at full input every cycle, so rooms overshoot and then drift back down. A two-stage furnace runs a reduced first stage through most of the season and steps up only in real cold. A modulating furnace adjusts firing rate in small increments, matching the mild shoulder weather that fills much of a Maryland heating season and evening out temperatures between floors of a split level or colonial.

Why does the blower motor matter as much as the burner?

A PSC motor runs on fixed speed taps and loses airflow as the filter loads and static pressure climbs. A constant-torque ECM draws less electricity for the same work but, like a PSC, holds torque rather than airflow, so airflow still falls as pressure rises. Only a true variable-speed ECM changes speed to hold target airflow, dropping to a fraction of the wattage at low speed. Continuous low-speed circulation for whole-home air cleaner equipment depends on that last type.

How does venting category limit what will fit?

An 80 percent AFUE furnace is Category I: non-condensing, negative vent pressure, into a lined masonry chimney or a Type B vent. A furnace at 90 percent or higher is Category IV: condensing, positive pressure, vented in PVC, CPVC, or polypropylene out a sidewall. That matters most in older county houses where a gas water heater shares the chimney: moving the furnace to a sidewall leaves the water heater alone on a flue sized for two appliances, which then has to be re-evaluated and often relined.

How is furnace size determined?

By a room-by-room heat loss calculation at the winter design temperature, not a rule of thumb per square foot. Then convert before comparing: output equals input multiplied by AFUE, so a 100,000 Btu input furnace at 96 percent AFUE is listed near 96,000 Btu out. Oversizing brings short cycles, swings, and register noise.

Frequently asked questions

Is a condensing furnace worth it in Maryland?

The heating season here is moderate compared with New England, so fuel savings between an 80 and a 96 percent unit accumulate slowly. Whether a sidewall vent route exists, and the 2028 minimum, usually weigh more.

How long does a gas furnace last?

Fifteen to twenty years is the range most often quoted for a well-maintained gas furnace. Heat exchanger coverage is the longest warranty on the unit, and manufacturers typically require registration soon after installation.

Where does the condensate from a condensing furnace go?

A condensing furnace makes several gallons of mildly acidic water on a cold day. It drains through a trap to a floor drain, a laundry standpipe, or a condensate pump. Cast iron waste lines call for a neutralizer, and a run through an unheated space needs freeze protection.

Talk to Shemtov Systems

Shemtov Systems can compare fuel types, AFUE tiers, staging, and venting routes for a house in Silver Spring, Olney, or the surrounding county: 240-355-3333.

Homeowner guides

Straight answers to the questions we hear most from Montgomery County homeowners.