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Frankford Township sits in the northeastern corner of Sussex County, stretching from the lake communities around Culvers Lake and Stony Lake toward the elevated farmland and wooded hillsides near the New York border. Winters here arrive hard and stay long — the township’s higher terrain and open rural landscape mean sustained cold that puts a real load on any heating system. When an aging furnace finally gives out in a Frankford Township home, a proper replacement isn’t just about picking a model off a spec sheet. It starts with sizing the system correctly for your home’s actual heat loss, not a square-footage estimate that ignores your ceiling heights, insulation gaps, or the fact that lakefront and hillside homes here can sit in the wind in ways a suburban house never does.
Constant Air has been based in Newton and serving Sussex County since 1999 — Frankford Township is roughly 12 miles northeast of our shop, close enough to get a crew out the same day. We start every furnace installation with a Manual J load calculation so the equipment we recommend is matched to your specific home, not whatever happens to be in the warehouse. Frankford’s housing stock is a real mix: older farmhouses along County Route 521, seasonal cottages that have since become year-round homes near the lakes, and newer construction further back in the hills. Each one heats differently, and we account for that before we ever quote a system.
We handle the full installation — equipment selection, gas or propane connections, venting, combustion air, thermostat setup, and Sussex County permit coordination. Free in-home estimates, written pricing before we start, and Hearth financing on qualifying systems so you’re not putting off a furnace replacement another winter.
Frankford Township is far enough out that a regional chain based in Morris County isn’t showing up the same day — and when a furnace quits in January near Culvers Lake or up in the hills off Route 521, waiting matters. Constant Air has been working throughout northeastern Sussex County since 1999, licensed under NJ HVACR #19HC00108700 with full insurance on every job. We know the older farmhouses, the converted lake cottages, and the newer builds out here because we’ve worked on all of them over the past 25-plus years. You get a Newton-based technician who knows the township, not a call-center ticket and a van arriving from an hour away. Free in-home estimates, honest written pricing, 24/7 availability for emergencies, and Hearth financing options — so a properly sized, high-efficiency furnace is within reach rather than something you keep postponing through another cold winter.
Straight, written estimate before any work starts.
We diagnose for your actual Frankford Township home — not a one-size guess.
NJ-licensed techs (#19HC00108700), done right the first time.
We stand behind the work and answer 24/7.
We run a Manual J load calculation on every installation — it factors in your home’s square footage, insulation levels, ceiling heights, window area, and local climate data for this part of Sussex County. A rule-of-thumb BTU estimate is never accurate enough for the mix of older farmhouses and lake-area homes out here. Call (973) 948-0680 to schedule your free in-home estimate and we’ll get the sizing right before anything is ordered.
Yes, propane systems are common throughout rural Sussex County and we install and service them regularly. We’ll check your existing propane setup, assess line sizing and regulator pressure, and recommend a high-efficiency propane furnace that matches your home’s layout and fuel costs. If you’re considering a switch from propane to natural gas — or vice versa — we can walk you through the tradeoffs. Reach us any time at (973) 948-0680.
Yes — New Jersey requires a mechanical permit for furnace replacements and new installations. Constant Air handles the permit application and schedules the final inspection as part of every job. We deal with the Sussex County construction office so you don’t have to, and having a proper permit on record protects you when you eventually sell the home.
Qualifying high-efficiency furnaces may be eligible for NJ Clean Energy Program rebates, and Hearth financing is available if you’d prefer to spread the cost. During your free in-home estimate we’ll identify which equipment qualifies and walk you through the current incentive amounts so you can factor that into your decision. Call (973) 948-0680 to get started.
Newton’s local HVAC team since 1999 — we answer 24/7 and serve all of Sussex County.
At Constant Air, we specialize in delivering high-quality heating, ventilation, and air conditioning services that keep your home and business comfortable all year round.
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